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[QUOTE="timjowers, post: 2954272"]
Does a way exist to instruct the Java compiler to compile code only
if a certain version of Java is supported? For example, I may want to
measure with milliseconds in Java 1.4 or nanoseconds if I'm running in
Java 5.

import java.io.IOException;

public class JVMLoadTimeRunner {

public static void main(String[] args) {

long start = System.currentTimeMillis(); // only compile this line
in Java 1.4
		//long start = System.nanoTime(); // only compile this line in Java
5

try {
			Process newP = Runtime.getRuntime().exec( cmd );
			newP.waitFor();
			long end = System.currentTimeMillis();
			System.out.println( "Process Execution took " + (float)(end-start)/
1000F + " seconds" );
// Java 5
			// System.out.println( "Process Execution took " + (float)(end-
start)/1000000000F + " seconds" );
		} catch (IOException e) {
			e.printStackTrace();
		} catch (InterruptedException e) {
			System.out.println( "Process wait threw an Exception" );
			e.printStackTrace();
		}
	}
}
[/QUOTE]

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