eclipse提示错误

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: /opt/eclipse/eclipse/jre/bin/java java in your current PATH

首先运行
update-alternatives --install /usr/bin/java java /home/txlong/dev/jdk1.6.0_24/bin/java 300 
update-alternatives --install /usr/bin/javac javac /home/txlong/dev/jdk1.6.0_24/bin/javac 300 
确保自己的jdk被使用为默认的jdk
update-alternatives --config java 
进行更新设置