Ubuntu运行myeclipse××××.run文件失效！！！

1.今天在Ubuntu上面安装jdk成功后（能够在终端上看到java的版本号）

jellycai@jellycai:~/下载$ java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
2.然后在执行

./myeclipse-2015-stable-2.0-offline-installer-linux.run 的时候提示

Starting installer - please wait...
- Preparing install engine
- Extracted install engine
- Unable to find Java environment
Make sure you have Java installed on your system.
You can download Java from:
http://java.com/

3.在终端中输入

sudo update-alternatives --config java
sudo update-alternatives --config javac
sudo update-alternatives --config javaws

命令全部失效，提示：

update-alternatives: 错误: 无 java 的候选项

4.然后在命令行中输入

 sudo update-alternatives --install /usr/bin/java java /job/jdk1.7.0_60/bin/java 300
 sudo update-alternatives --install /usr/bin/javac javac /job/jdk1.7.0_60/bin/javac 300

 sudo update-alternatives --install /usr/bin/javaws javaws /job/jdk1.7.0_60/bin/javaws 300

 sudo update-alternatives --install /usr/bin/jar jar /job/jdk1.7.0_60/bin/jar 300

 sudo update-alternatives --install /usr/bin/javap javap /job/jdk1.7.0_60/bin/javap 300

 sudo update-alternatives --install /usr/bin/javah javah /job/jdk1.7.0_60/bin/javah 300

提示

update-alternatives: using /job/jdk1.7.0_60/bin/javaws to provide /usr/bin/javaws (javaws) in 自动模式

5.然后输入：

sudo update-alternatives --config java
sudo update-alternatives --config javac
sudo update-alternatives --config javaws

提示：

链接组 javaws (提供 /usr/bin/javaws)中只有一个候选项：/job/jdk1.7.0_60/bin/javaws
无需配置。

6.最后输入

./myeclipse-2015-stable-2.0-offline-installer-linux.run

开始安装，问题解决