【问题】
折腾：
期间，结果找不到java而出错：
| A Java Runtime Environment (JRE) or Java Development Kit (JDK) must be available in order to run Eclipse No Java virtual machine was found after searching the following locations: /home/crifan/develop/eclipse/eclipse/jre/bin/java java in your current PATH |
如图：
【解决过程】
1.很明显，是没有找到java。
所以，要么是Ubuntu中没有安装Java，要么是安装了java，但是没有把路径加到PATH中。
2.参考：
虽然有解决办法，但是觉得很不靠谱。
3.参考：
problem running eclipse on ubuntu?
去安装java，结果却由于依赖性问题，无法安装：
crifan@ubuntu:eclipse$ sudo apt-get install openjdk-7-jre
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
openjdk-7-jre : Depends: openjdk-7-jre-headless (= 7u25-2.3.10-1ubuntu0.12.04.2) but it is not going to be installed
Recommends: libgconf2-4 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
crifan@ubuntu:eclipse$ 4.搜一下，现在有哪些openjdk：
crifan@ubuntu:eclipse$ apt-cache search openjdk default-jdk-doc - Standard Java or Java compatible Development Kit (documentation) icedtea-6-jre-cacao - Alternative JVM for OpenJDK, using Cacao icedtea-6-jre-jamvm - Alternative JVM for OpenJDK, using JamVM icedtea-6-plugin - web browser plugin based on OpenJDK and IcedTea to execute Java applets libreoffice - office productivity suite openjdk-6-dbg - Java runtime based on OpenJDK (debugging symbols) openjdk-6-demo - Java runtime based on OpenJDK (demos and examples) openjdk-6-doc - OpenJDK Development Kit (JDK) documentation openjdk-6-jdk - OpenJDK Development Kit (JDK) openjdk-6-jre - OpenJDK Java runtime, using Hotspot JIT openjdk-6-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless) openjdk-6-jre-lib - OpenJDK Java runtime (architecture independent libraries) openjdk-6-source - OpenJDK Development Kit (JDK) source files default-jdk - Standard Java or Java compatible Development Kit default-jre - Standard Java or Java compatible Runtime default-jre-headless - Standard Java or Java compatible Runtime (headless) freemind - Java Program for creating and viewing Mindmaps icedtea-7-jre-jamvm - Alternative JVM for OpenJDK, using JamVM icedtea-7-plugin - web browser plugin based on OpenJDK and IcedTea to execute Java applets jtreg - Regression Test Harness for the OpenJDK platform openjdk-6-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark openjdk-7-dbg - Java runtime based on OpenJDK (debugging symbols) openjdk-7-demo - Java runtime based on OpenJDK (demos and examples) openjdk-7-doc - OpenJDK Development Kit (JDK) documentation openjdk-7-jdk - OpenJDK Development Kit (JDK) openjdk-7-jre - OpenJDK Java runtime, using Hotspot JIT openjdk-7-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless) openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries) openjdk-7-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark openjdk-7-source - OpenJDK Development Kit (JDK) source files uwsgi-app-integration-plugins - plugins for integration of uWSGI and application uwsgi-plugin-jvm-openjdk-6 - Java plugin for uWSGI (OpenJDK 6) uwsgi-plugin-jwsgi-openjdk-6 - JWSGI plugin for uWSGI (OpenJDK 6) icedtea-7-jre-cacao - Transitional package for obsolete Cacao JVM for OpenJDK java-package - Utility for creating Java Debian packages crifan@ubuntu:eclipse$
5.然后去试试安装那个openjdk-7-jre-lib，结果同样错误：
crifan@ubuntu:eclipse$ sudo apt-get install openjdk-7-jre-lib Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: openjdk-7-jre-lib : Depends: openjdk-7-jre-headless (>= 7~b130~pre0) but it is not going to be installed E: Unable to correct problems, you have held broken packages. crifan@ubuntu:eclipse$
6.再去试试那个oracle-java7-jre，结果根本找不到：
crifan@ubuntu:eclipse$ sudo apt-get install oracle-java7-jre Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package oracle-java7-jre crifan@ubuntu:eclipse$
注：我此处是163的源。
7.参考：
去确认一下，当前的JAVA_HOME是否正常，结果是空的：
crifan@ubuntu:eclipse$ echo $JAVA_HOME crifan@ubuntu:eclipse$
8.然后想要查看当前所有的环境变量，看看是否有JAVA_HOME：
结果是没有：
crifan@ubuntu:eclipse$ env SSH_AGENT_PID=1815 GPG_AGENT_INFO=/run/user/crifan/keyring-ypbBAB/gpg:0:1 SHELL=/bin/bash TERM=xterm XDG_SESSION_COOKIE=0a0bee208665f2e846489a7a5201cc2e-1376291429.866841-1612993008 WINDOWID=54539546 GNOME_KEYRING_CONTROL=/run/user/crifan/keyring-ypbBAB GTK_MODULES=overlay-scrollbar USER=crifan LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36: XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0 XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 SSH_AUTH_SOCK=/run/user/crifan/keyring-ypbBAB/ssh SESSION_MANAGER=local/ubuntu:@/tmp/.ICE-unix/1621,unix/ubuntu:/tmp/.ICE-unix/1621 DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg PATH=/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin DESKTOP_SESSION=ubuntu PWD=/home/crifan/develop/eclipse/eclipse LANG=en_US.UTF-8 MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path UBUNTU_MENUPROXY=libappmenu.so COMPIZ_CONFIG_PROFILE=ubuntu GDMSESSION=ubuntu SHLVL=1 HOME=/home/crifan GNOME_DESKTOP_SESSION_ID=this-is-deprecated LOGNAME=crifan XDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/ DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-9VvgvBhebq,guid=91e5460bc6b671a0784b34b852088a6a LESSOPEN=| /usr/bin/lesspipe %s TEXTDOMAIN=im-config DISPLAY=:0.0 XDG_RUNTIME_DIR=/run/user/crifan XDG_CURRENT_DESKTOP=Unity LESSCLOSE=/usr/bin/lesspipe %s %s TEXTDOMAINDIR=/usr/share/locale/ XAUTHORITY=/home/crifan/.Xauthority COLORTERM=gnome-terminal _=/usr/bin/env
9.所以，先去确认一下，当前的java的真正路径，结果真的没找到java：
crifan@ubuntu:eclipse$ ls / -lh total 96K drwxr-xr-x 2 root root 4.0K Aug 11 19:30 bin drwxr-xr-x 3 root root 4.0K Aug 12 00:13 boot drwxr-xr-x 2 root root 4.0K Aug 6 19:43 cdrom drwxr-xr-x 15 root root 4.3K Aug 12 00:13 dev drwxr-xr-x 137 root root 12K Aug 12 00:24 etc drwxr-xr-x 4 root root 4.0K Aug 7 01:04 home lrwxrwxrwx 1 root root 32 Aug 11 19:32 initrd.img -> boot/initrd.img-3.8.0-27-generic lrwxrwxrwx 1 root root 33 Aug 11 19:32 initrd.img.old -> /boot/initrd.img-3.8.0-27-generic drwxr-xr-x 22 root root 4.0K Aug 6 20:53 lib drwx------ 2 root root 16K Aug 6 19:41 lost+found drwxr-xr-x 4 root root 4.0K Aug 7 18:44 media drwxr-xr-x 3 root root 4.0K Aug 7 02:38 mnt drwxr-xr-x 4 root root 4.0K Aug 7 02:56 opt dr-xr-xr-x 192 root root 0 Aug 12 00:10 proc drwx------ 12 root root 4.0K Aug 7 00:57 root drwxr-xr-x 22 root root 780 Aug 12 00:10 run drwxr-xr-x 2 root root 12K Aug 12 00:12 sbin drwxr-xr-x 2 root root 4.0K Jun 11 2012 selinux drwxr-xr-x 2 root root 4.0K Apr 24 10:02 srv dr-xr-xr-x 13 root root 0 Aug 12 00:10 sys drwxrwxrwt 8 root root 4.0K Aug 12 01:50 tmp drwxr-xr-x 10 root root 4.0K Apr 24 10:02 usr drwxr-xr-x 13 root root 4.0K Aug 12 00:10 var lrwxrwxrwx 1 root root 29 Aug 11 19:32 vmlinuz -> boot/vmlinuz-3.8.0-27-generic lrwxrwxrwx 1 root root 29 Aug 11 19:32 vmlinuz.old -> boot/vmlinuz-3.8.0-27-generic crifan@ubuntu:eclipse$ ls /bin/ Display all 150 possibilities? (y or n) crifan@ubuntu:eclipse$ ls /usr/bin/ Display all 1469 possibilities? (y or n) crifan@ubuntu:eclipse$ ls /usr/bin/j join json_pp crifan@ubuntu:eclipse$ ls /usr/bin/^C
10.然后，通过输入java，发现有用的提示：
crifan@ubuntu:eclipse$ java The program 'java' can be found in the following packages: * default-jre * gcj-4.6-jre-headless * gcj-4.7-jre-headless * openjdk-7-jre-headless * openjdk-6-jre-headless Try: sudo apt-get install <selected package> crifan@ubuntu:eclipse$
所以，可以去试试安装那个openjdk-7-jre-headless：
结果还是无法安装：
crifan@ubuntu:eclipse$ sudo apt-get install openjdk-7-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
openjdk-7-jre-headless : Depends: ca-certificates-java but it is not going to be installed
Depends: tzdata-java (>= 2012e-0ubuntu0.12.04.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
crifan@ubuntu:eclipse$ 11.再去试试其他几个最后只有可以gcj-4.6-jre-headless安装：
crifan@ubuntu:eclipse$ sudo apt-get install default-jre
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
default-jre : Depends: default-jre-headless (= 1:1.6-43ubuntu2) but it is not going to be installed
Depends: openjdk-6-jre (>= 6b23~pre11-1ubuntu1~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
crifan@ubuntu:eclipse$ sudo apt-get install openjdk-6-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
openjdk-6-jre-headless : Depends: ca-certificates-java but it is not going to be installed
Depends: tzdata-java but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
crifan@ubuntu:eclipse$ sudo apt-get install gcj-4.7-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package gcj-4.7-jre-headless
E: Couldn't find any package by regex 'gcj-4.7-jre-headless'
crifan@ubuntu:eclipse$ sudo apt-get install gcj-4.6-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
gcj-4.6-base gcj-4.6-jre-lib libgcj-common libgcj12
Suggested packages:
fastjar gcj-4.6-jdk libgcj12-awt libgcj12-dbg
The following NEW packages will be installed:
gcj-4.6-base gcj-4.6-jre-headless gcj-4.6-jre-lib libgcj-common libgcj12
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 22.1 MB of archives.
After this operation, 51.9 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://mirrors.163.com/ubuntu/ precise/main gcj-4.6-base i386 4.6.3-1ubuntu2 [11.3 kB]
Get:2 http://mirrors.163.com/ubuntu/ precise/main libgcj-common all 1:4.6.3-1ubuntu5 [127 kB]
Get:3 http://mirrors.163.com/ubuntu/ precise/main libgcj12 i386 4.6.3-1ubuntu2 [11.4 MB]
Get:4 http://mirrors.163.com/ubuntu/ precise/main gcj-4.6-jre-headless i386 4.6.3-1ubuntu2 [60.0 kB]
Get:5 http://mirrors.163.com/ubuntu/ precise/main gcj-4.6-jre-lib all 4.6.3-1ubuntu2 [10.5 MB]
Fetched 22.1 MB in 1min 33s (235 kB/s)
Selecting previously unselected package gcj-4.6-base.
(Reading database ... 187522 files and directories currently installed.)
Unpacking gcj-4.6-base (from .../gcj-4.6-base_4.6.3-1ubuntu2_i386.deb) ...
Selecting previously unselected package libgcj-common.
Unpacking libgcj-common (from .../libgcj-common_1%3a4.6.3-1ubuntu5_all.deb) ...
Selecting previously unselected package libgcj12.
Unpacking libgcj12 (from .../libgcj12_4.6.3-1ubuntu2_i386.deb) ...
Selecting previously unselected package gcj-4.6-jre-headless.
Unpacking gcj-4.6-jre-headless (from .../gcj-4.6-jre-headless_4.6.3-1ubuntu2_i386.deb) ...
Selecting previously unselected package gcj-4.6-jre-lib.
Unpacking gcj-4.6-jre-lib (from .../gcj-4.6-jre-lib_4.6.3-1ubuntu2_all.deb) ...
Processing triggers for man-db ...
Setting up gcj-4.6-base (4.6.3-1ubuntu2) ...
Setting up libgcj-common (1:4.6.3-1ubuntu5) ...
Setting up libgcj12 (4.6.3-1ubuntu2) ...
Setting up gcj-4.6-jre-headless (4.6.3-1ubuntu2) ...
Setting up gcj-4.6-jre-lib (4.6.3-1ubuntu2) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
crifan@ubuntu:eclipse$ 安装后，试试java是否可用，貌似是可用的：
crifan@ubuntu:eclipse$ java --version java version "1.5.0" gij (GNU libgcj) version 4.6.3 Copyright (C) 2007 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. crifan@ubuntu:eclipse$ which java /usr/bin/java
但是，貌似JAVA_HOME，是什么，都不知道。。。
12.所以，看来，还是先去解决上面那个错误吧：
13.后来参考：
openjdk-7-jre_7u25-2.3.10-1ubuntu0.12.04.2_amd64.deb
看到有：
/usr/lib/jvm
中有java。
所以去看了看，果然有：
crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/ java-1.5.0-gcj-4.6/ java-gcj-4.6/ .java-gcj-4.6.jinfo crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/java-1.5.0-gcj-4.6/ bin jre lib man crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/java-1.5.0-gcj-4.6/bin/ gcj-dbtool gij java keytool orbd rmid rmiregistry tnameserv crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/java- java-1.5.0-gcj-4.6/ java-gcj-4.6/ crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/java-gcj-4.6/ bin/ jre/ lib/ man/ crifan@ubuntu:openjdk-7-7u25-2.3.10$ ls /usr/lib/jvm/java-gcj-4.6/bin/ gcj-dbtool gij java keytool orbd rmid rmiregistry tnameserv crifan@ubuntu:openjdk-7-7u25-2.3.10$
所以，尝试去设置JAVA_HOME。
参考：
How to set JAVA_HOME in Ubuntu?
去加上：
PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin:/usr/lib/jvm/java-gcj-4.6
然后source使其生效，然后再去运行Eclipse试试，结果说是版本太低：
14.所以，还是要想办法，去安装1.6或1.7的java才可以。
15.后来，解决了：
接着，就可以去：
（1）卸载旧的1.5的java：
crifan@ubuntu:openjdk-7-7u25-2.3.10$ sudo apt-get autoremove gcj-4.6-jre-headless Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: gcj-4.6-base gcj-4.6-jre-headless gcj-4.6-jre-lib libgcj-common libgcj12 0 upgraded, 0 newly installed, 5 to remove and 6 not upgraded. After this operation, 51.9 MB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 188432 files and directories currently installed.) Removing gcj-4.6-jre-lib ... Removing gcj-4.6-jre-headless ... Removing libgcj12 ... Removing gcj-4.6-base ... Removing libgcj-common ... Processing triggers for man-db ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place
（2）再把之前在.bashrc中加到PATH的路径去掉：
PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin #PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin:/usr/lib/jvm/java-gcj-4.6
以及：
crifan@ubuntu:openjdk-7-7u25-2.3.10$ source ~/.bashrc
（3）确认重新安装最新的1.7的java：
crifan@ubuntu:eclipse$ java --version Unrecognized option: --version Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. crifan@ubuntu:eclipse$ javac --version The program 'javac' can be found in the following packages: * default-jdk * ecj * gcj-4.6-jdk * gcj-4.7-jdk * openjdk-7-jdk * openjdk-6-jdk Try: sudo apt-get install <selected package> crifan@ubuntu:eclipse$ sudo apt-get install openjdk-7-jdk Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libatk-wrapper-java libatk-wrapper-java-jni libbonobo2-0 libbonobo2-common libgconf2-4 libgif4 libgnome2-0 libgnome2-bin libgnome2-common libgnomevfs2-0 libgnomevfs2-common libice-dev libidl-common libidl0 liborbit2 libpthread-stubs0 libpthread-stubs0-dev libsm-dev libx11-dev libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxt-dev openjdk-7-jre ttf-dejavu-extra x11proto-core-dev x11proto-input-dev x11proto-kb-dev xorg-sgml-doctools xtrans-dev Suggested packages: libbonobo2-bin desktop-base libgnomevfs2-bin libgnomevfs2-extra gamin fam gnome-mime-data libice-doc libsm-doc libxcb-doc libxt-doc openjdk-7-demo openjdk-7-source visualvm icedtea-7-plugin The following NEW packages will be installed: libatk-wrapper-java libatk-wrapper-java-jni libbonobo2-0 libbonobo2-common libgconf2-4 libgif4 libgnome2-0 libgnome2-bin libgnome2-common libgnomevfs2-0 libgnomevfs2-common libice-dev libidl-common libidl0 liborbit2 libpthread-stubs0 libpthread-stubs0-dev libsm-dev libx11-dev libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxt-dev openjdk-7-jdk openjdk-7-jre ttf-dejavu-extra x11proto-core-dev x11proto-input-dev x11proto-kb-dev xorg-sgml-doctools xtrans-dev 0 upgraded, 32 newly installed, 0 to remove and 6 not upgraded. Need to get 24.7 MB of archives. After this operation, 52.4 MB of additional disk space will be used. Do you want to continue [Y/n]? y Get:1 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgif4 i386 4.1.6-10ubuntu1 [31.3 kB] Get:2 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main openjdk-7-jre i386 7u25-2.3.10-1ubuntu0.13.04.2 [225 kB] Get:3 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libatk-wrapper-java all 0.30.4-0ubuntu4 [29.8 kB] Get:4 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libatk-wrapper-java-jni i386 0.30.4-0ubuntu4 [31.7 kB] Get:5 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libbonobo2-common all 2.32.1-0ubuntu3 [34.1 kB] Get:6 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libidl-common all 0.8.14-0.2ubuntu3 [8,536 B] Get:7 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libidl0 i386 0.8.14-0.2ubuntu3 [76.9 kB] Get:8 http://mirrors.ustc.edu.cn/ubuntu/ raring/main liborbit2 i386 1:2.14.19-0.1ubuntu2 [143 kB] Get:9 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libbonobo2-0 i386 2.32.1-0ubuntu3 [204 kB] Get:10 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgnomevfs2-common i386 1:2.24.4-1ubuntu5 [23.1 kB] Get:11 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgnomevfs2-0 i386 1:2.24.4-1ubuntu5 [209 kB] Get:12 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgnome2-common all 2.32.1-2ubuntu4 [33.3 kB] Get:13 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgnome2-bin i386 2.32.1-2ubuntu4 [14.9 kB] Get:14 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgnome2-0 i386 2.32.1-2ubuntu4 [42.0 kB] Get:15 http://mirrors.ustc.edu.cn/ubuntu/ raring/main ttf-dejavu-extra all 2.33-3ubuntu2 [1,680 kB] Get:16 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libgconf2-4 i386 3.2.6-0ubuntu1 [2,046 B] Get:17 http://mirrors.ustc.edu.cn/ubuntu/ raring/main xorg-sgml-doctools all 1:1.10-1 [12.0 kB] Get:18 http://mirrors.ustc.edu.cn/ubuntu/ raring/main x11proto-core-dev all 7.0.23-1 [744 kB] Get:19 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libice-dev i386 2:1.0.8-2 [52.3 kB] Get:20 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libpthread-stubs0 i386 0.3-3 [3,264 B] Get:21 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libpthread-stubs0-dev i386 0.3-3 [2,860 B] Get:22 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libsm-dev i386 2:1.2.1-2 [17.6 kB] Get:23 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libxau-dev i386 1:1.0.7-1 [10.0 kB] Get:24 http://mirrors.ustc.edu.cn/ubuntu/ raring/main libxdmcp-dev i386 1:1.1.1-1 [26.8 kB] Get:25 http://mirrors.ustc.edu.cn/ubuntu/ raring/main x11proto-input-dev all 2.2.99.1-0ubuntu1 [139 kB] Get:26 http://mirrors.ustc.edu.cn/ubuntu/ raring/main x11proto-kb-dev all 1.0.6-2 [269 kB] Get:27 http://mirrors.ustc.edu.cn/ubuntu/ raring/main xtrans-dev all 1.2.7-1 [84.3 kB] Get:28 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main libxcb1-dev i386 1.8.1-2ubuntu2.1 [81.2 kB] Get:29 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main libx11-dev i386 2:1.5.0-1ubuntu1.1 [895 kB] Get:30 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main libx11-doc all 2:1.5.0-1ubuntu1.1 [2,448 kB] Get:31 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main libxt-dev i386 1:1.1.3-1ubuntu0.13.04.1 [472 kB] Get:32 http://mirrors.ustc.edu.cn/ubuntu/ raring-updates/main openjdk-7-jdk i386 7u25-2.3.10-1ubuntu0.13.04.2 [16.6 MB] Fetched 24.7 MB in 12s (1,995 kB/s) Extracting templates from packages: 100% Selecting previously unselected package libgif4:i386. (Reading database ... 188328 files and directories currently installed.) Unpacking libgif4:i386 (from .../libgif4_4.1.6-10ubuntu1_i386.deb) ... Selecting previously unselected package openjdk-7-jre:i386. Unpacking openjdk-7-jre:i386 (from .../openjdk-7-jre_7u25-2.3.10-1ubuntu0.13.04.2_i386.deb) ... Selecting previously unselected package libatk-wrapper-java. Unpacking libatk-wrapper-java (from .../libatk-wrapper-java_0.30.4-0ubuntu4_all.deb) ... Selecting previously unselected package libatk-wrapper-java-jni:i386. Unpacking libatk-wrapper-java-jni:i386 (from .../libatk-wrapper-java-jni_0.30.4-0ubuntu4_i386.deb) ... Selecting previously unselected package libbonobo2-common. Unpacking libbonobo2-common (from .../libbonobo2-common_2.32.1-0ubuntu3_all.deb) ... Selecting previously unselected package libidl-common. Unpacking libidl-common (from .../libidl-common_0.8.14-0.2ubuntu3_all.deb) ... Selecting previously unselected package libidl0:i386. 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Setting up libgif4:i386 (4.1.6-10ubuntu1) ... Setting up libbonobo2-common (2.32.1-0ubuntu3) ... Setting up libidl-common (0.8.14-0.2ubuntu3) ... Setting up libidl0:i386 (0.8.14-0.2ubuntu3) ... Setting up liborbit2:i386 (1:2.14.19-0.1ubuntu2) ... Setting up libbonobo2-0:i386 (2.32.1-0ubuntu3) ... Setting up libgnomevfs2-common (1:2.24.4-1ubuntu5) ... Setting up libgnomevfs2-0:i386 (1:2.24.4-1ubuntu5) ... Setting up libgnome2-common (2.32.1-2ubuntu4) ... Setting up ttf-dejavu-extra (2.33-3ubuntu2) ... Setting up libgconf2-4:i386 (3.2.6-0ubuntu1) ... Setting up xorg-sgml-doctools (1:1.10-1) ... Setting up x11proto-core-dev (7.0.23-1) ... Setting up libice-dev:i386 (2:1.0.8-2) ... Setting up libpthread-stubs0:i386 (0.3-3) ... Setting up libpthread-stubs0-dev:i386 (0.3-3) ... Setting up libsm-dev:i386 (2:1.2.1-2) ... Setting up libxau-dev:i386 (1:1.0.7-1) ... Setting up libxdmcp-dev:i386 (1:1.1.1-1) ... Setting up x11proto-input-dev (2.2.99.1-0ubuntu1) ... Setting up x11proto-kb-dev (1.0.6-2) ... Setting up xtrans-dev (1.2.7-1) ... Setting up libxcb1-dev:i386 (1.8.1-2ubuntu2.1) ... Setting up libx11-dev:i386 (2:1.5.0-1ubuntu1.1) ... Setting up libx11-doc (2:1.5.0-1ubuntu1.1) ... Setting up libxt-dev:i386 (1:1.1.3-1ubuntu0.13.04.1) ... Setting up openjdk-7-jre:i386 (7u25-2.3.10-1ubuntu0.13.04.2) ... update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/jre/bin/policytool to provide /usr/bin/policytool (policytool) in auto mode Setting up libatk-wrapper-java (0.30.4-0ubuntu4) ... Setting up openjdk-7-jdk:i386 (7u25-2.3.10-1ubuntu0.13.04.2) ... update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/appletviewer to provide /usr/bin/appletviewer (appletviewer) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/extcheck to provide /usr/bin/extcheck (extcheck) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/idlj to provide /usr/bin/idlj (idlj) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jar to provide /usr/bin/jar (jar) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jarsigner to provide /usr/bin/jarsigner (jarsigner) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/javac to provide /usr/bin/javac (javac) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/javadoc to provide /usr/bin/javadoc (javadoc) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/javah to provide /usr/bin/javah (javah) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/javap to provide /usr/bin/javap (javap) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jcmd to provide /usr/bin/jcmd (jcmd) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jconsole to provide /usr/bin/jconsole (jconsole) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jdb to provide /usr/bin/jdb (jdb) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jhat to provide /usr/bin/jhat (jhat) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jinfo to provide /usr/bin/jinfo (jinfo) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jmap to provide /usr/bin/jmap (jmap) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jps to provide /usr/bin/jps (jps) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jrunscript to provide /usr/bin/jrunscript (jrunscript) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jsadebugd to provide /usr/bin/jsadebugd (jsadebugd) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jstack to provide /usr/bin/jstack (jstack) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jstat to provide /usr/bin/jstat (jstat) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/jstatd to provide /usr/bin/jstatd (jstatd) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/native2ascii to provide /usr/bin/native2ascii (native2ascii) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/rmic to provide /usr/bin/rmic (rmic) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/schemagen to provide /usr/bin/schemagen (schemagen) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/serialver to provide /usr/bin/serialver (serialver) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/wsgen to provide /usr/bin/wsgen (wsgen) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/wsimport to provide /usr/bin/wsimport (wsimport) in auto mode update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/bin/xjc to provide /usr/bin/xjc (xjc) in auto mode Setting up libatk-wrapper-java-jni:i386 (0.30.4-0ubuntu4) ... Setting up libgnome2-bin (2.32.1-2ubuntu4) ... Setting up libgnome2-0:i386 (2.32.1-2ubuntu4) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place
确认一下：
crifan@ubuntu:eclipse$ ls /usr/lib/jvm/ java-1.7.0-openjdk-i386/ java-7-openjdk-common/ .java-1.7.0-openjdk-i386.jinfo java-7-openjdk-i386/ crifan@ubuntu:eclipse$ ls /usr/lib/jvm/java-1.7.0-openjdk-i386/ ASSEMBLY_EXCEPTION docs/ jre/ man/ THIRD_PARTY_README bin/ include/ lib/ src.zip crifan@ubuntu:eclipse$ ls /usr/lib/jvm/java-1.7.0-openjdk-i386/bin -lh total 236K -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 appletviewer -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 apt -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 extcheck -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 idlj -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jar -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jarsigner lrwxrwxrwx 1 root root 15 Jul 3 12:59 java -> ../jre/bin/java -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 javac -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 javadoc -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 javah -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 javap -rwxr-xr-x 1 root root 2.8K Jul 3 07:04 java-rmi.cgi -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jcmd -rwxr-xr-x 1 root root 5.6K Jul 3 13:00 jconsole -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jdb -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jhat -rwxr-xr-x 1 root root 5.6K Jul 3 13:00 jinfo -rwxr-xr-x 1 root root 5.6K Jul 3 13:00 jmap -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jps -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jrunscript -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jsadebugd -rwxr-xr-x 1 root root 5.6K Jul 3 13:00 jstack -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jstat -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 jstatd lrwxrwxrwx 1 root root 18 Jul 3 12:59 keytool -> ../jre/bin/keytool -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 native2ascii lrwxrwxrwx 1 root root 15 Jul 3 12:59 orbd -> ../jre/bin/orbd lrwxrwxrwx 1 root root 18 Jul 3 12:59 pack200 -> ../jre/bin/pack200 lrwxrwxrwx 1 root root 21 Jul 3 12:59 policytool -> ../jre/bin/policytool -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 rmic lrwxrwxrwx 1 root root 15 Jul 3 12:59 rmid -> ../jre/bin/rmid lrwxrwxrwx 1 root root 22 Jul 3 12:59 rmiregistry -> ../jre/bin/rmiregistry -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 schemagen -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 serialver lrwxrwxrwx 1 root root 21 Jul 3 12:59 servertool -> ../jre/bin/servertool lrwxrwxrwx 1 root root 20 Jul 3 12:59 tnameserv -> ../jre/bin/tnameserv lrwxrwxrwx 1 root root 20 Jul 3 12:59 unpack200 -> ../jre/bin/unpack200 -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 wsgen -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 wsimport -rwxr-xr-x 1 root root 5.5K Jul 3 13:00 xjc crifan@ubuntu:eclipse$
（4）且加上JAVA_HOME了：
#PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin:/usr/lib/jvm/java-1.7.0-openjdk-i386/
source一下：
crifan@ubuntu:eclipse$ source ~/.bashrc
即可找到：
crifan@ubuntu:eclipse$ java
Usage: java [-options] class [args...]
(to execute a class)
or java [-options] -jar jarfile [args...]
(to execute a jar file)
where options include:
-d32 use a 32-bit data model if available
-d64 use a 64-bit data model if available
-client to select the "client" VM
-server to select the "server" VM
-zero to select the "zero" VM
-jamvm to select the "jamvm" VM
-avian to select the "avian" VM
-hotspot is a synonym for the "client" VM [deprecated]
The default VM is server,
because you are running on a server-class machine.
-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
A : separated list of directories, JAR archives,
and ZIP archives to search for class files.
-D<name>=<value>
set a system property
-verbose:[class|gc|jni]
enable verbose output
-version print product version and exit
-version:<value>
require the specified version to run
-showversion print product version and continue
-jre-restrict-search | -no-jre-restrict-search
include/exclude user private JREs in the version search
-? -help print this help message
-X print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
enable assertions with specified granularity
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
disable assertions with specified granularity
-esa | -enablesystemassertions
enable system assertions
-dsa | -disablesystemassertions
disable system assertions
-agentlib:<libname>[=<options>]
load native agent library <libname>, e.g. -agentlib:hprof
see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
load Java programming language agent, see java.lang.instrument
-splash:<imagepath>
show splash screen with specified image
See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.
crifan@ubuntu:eclipse$ javac -version
javac 1.7.0_25
crifan@ubuntu:eclipse$ which java
/usr/bin/java（5）再去双击运行Eclipse，结果终于可以正常打开了：
包括第一次跳出界面，设置workspace：
【总结】
当双击Eclipse运行出错：
时，解决办法很简单：
1.安装jre（我此处安装的是jdk，包括了jre）：
sudo apt-get install openjdk-7-jdk
2.设置好对应的JAVA_HOME
PATH=$PATH:/opt/crosstool-ng/bin:/opt/crosscompile/xscale/gcc-4.6.0-glibc-2.9/bin:/opt/crosscompile/curl/bin:/opt/crosscompile/pcre/bin:/usr/lib/jvm/java-1.7.0-openjdk-i386/
即可。
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