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import java.util.LinkedList;import java.util.Iterator;public class LoopTest {	public static void main(String[] args) {		Thread.currentThread().setPriority(Thread.MAX_PRIORITY);		long time1, time2, time3, time4;		LinkedList l1 = new LinkedList(), l2 = new LinkedList(), l3 = new LinkedList();		for(int i=0; i<1000000; i++) {			l1.add(i);			l2.add(i);			l3.add(i);		}		time1 = System.nanoTime();		for(Iterator it = l1.iterator(); it.hasNext();) {			it.next();		}		time2 = System.nanoTime();		for(Object o : l3) {			//		}		time3 = System.nanoTime();		Iterator it = l2.iterator();		while(it.hasNext()) {			it.next();		}		time4 = System.nanoTime();		System.out.println(time2-time1);		System.out.println(time3-time2);		System.out.println(time4-time3);	}}