這兩天在ubuntu上安裝eclipse真的是遇到了各種問題，

其實我的JDK早就已經安裝好了

但是開啟eclipese的時候提示：

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/xxxx/ADT/ADT/adt-bundle-linux-x86_64-20131030/eclipse/jre/bin/java
java in your current PATH

一開始覺得查網上資料以為是我的JDK配置有問題：

仔細察看

#set java environment
JAVA_HOME=/home/tools/jdk1.6.0_45
export JRE_HOME=/home/tools/jdk1.6.0_45/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH 

是沒有問題的

$ java -version 
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) Server VM (build 20.45-b01, mixed mode)

也是OK的

後面修改：

 vi /etc/environment

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/tools/jdk1.6.0_45/bin"

CLASSPATH="/home/tools/jdk1.6.0_45/lib"
JAVA_HOME="/home/tools/jdk1.6.0_45"
ANDROID_SDK_HOME="/home/xxx/ADT/ADT/adt-bundle-linux-x86_64-20131030/sdk"

修改完這個之後就可以正常開啟eclipse了.