I need to launch an app that needs java runtime enviro 1.5. It is saying that it is not installed on my mac but I think it is.

I need to launch an app that requires javaruntime 1.5. My mac is saying that it is not installed but when i go into utilities, it looks like it is.
Don't know where to go from here.
I have version 10.7.3.

I believe that i have the latest version of Java runtime. But my app should be running on it but its not.
Well, either you don't actually have Java, as you think you do, or the app won't run in the latest Java runtime.  Try entering the following command in the Terminal (found in /Applications/Utilities):
java -version
If that causes an install window to appear, you don't have Java at all.
If it displays a version number, make a note of that version, and ask the developer of the app whether it should run in that version of Java.

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