perftest.java

java手机程序设计入门配套的源代码 很详细 感觉很好

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class PerfTest extends MIDlet
{	
	public PerfTest() 
	{
	}
	public void startApp()
	{
		long start,end ;
		start = System.currentTimeMillis() ;
		for(int i=0 ; i < 9000000 ; i++) ;
		end = System.currentTimeMillis() ;
		System.out.println("Normal loop : "+ (end-start) + " milliseconds") ;
		
		start = System.currentTimeMillis() ;
		for(int i=8999999 ; i >= 0 ; i--) ;
		end = System.currentTimeMillis() ;
		System.out.println("Optimized loop : "+ (end-start) + " milliseconds") ;
	}
	public void pauseApp() 
	{
	}
	public void destroyApp(boolean unconditional) 
	{
	}
}