Recently I tried to use Eclipse but when I open it,it told me my JVM verion is too old
Incompatible JVM
Version 1.5.0_05 of the JVM is not suitable for this prod
I doesn't know what did you do before, but you have to check :
The java version (according with your eclipse and its version). The JAVA_HOME path (jdk) in global environment variables. Try to change the runtimes environment in Eclipse.
This happen when you have another java version installed in your S.O. and the path to this version stay in "Environment Variables"."Path". So, remove any path that is pointing to another old version of java. In my case, i have oracle Forms6i installed in my S.O., and the installation program putted the path to the java 1.4. In my case the path was: C:\oracle\product\10.1.0\Client_1\jre\1.4.2\bin\client; C:\oracle\product\10.1.0\Client_1\jre\1.4.2\bin;
To access "Ambient Variables" no windows, right click mouse button on "My Computer" -> "Properties". On the left side click in "Advanced System Settings", on the top, click in the guide "Advanced", then click in the last button on the bottom, "Enviroment Variables". On the bottom have "System Variables", search for "Path" and do what i said there on top.
In your ~/.bashrc file add the following lines
export JAVA_HOME=/home/username/jdk1.7.0_11
export JDK_HOME=$JAVA_HOME
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=$JAVA_HOME/lib:$JAVA_HOME/jre/lib
in place of jdk1.7.0_11 put your JDK and see to it that the specified path is correct(wherever you have youe JDK).
What does this site say?
http://www.java.com/en/download/uninstallapplet.jsp
You should probably look for version 1.7, not 1.6. (That's more current)
If you have an older version of Java, go here:
http://java.com/en/download/index.jsp
If this is happening when you click on the Eclipse icon, make sure that you have completely removed any previous Java installation. If you need to have Java 1.5, make sure that this installation is not referenced in the PATH environment variable.
If you can start eclipse, you can configure Eclipse projects to use the correct Java installation.