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
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.