package project2;public class EchoTestDrive {public static void main(String[] args){Echo e1=new Echo();Echo e2=new Echo();int x=0;while(x<4) {?? ?e1.hello();?? ?e1.count=e1.count+1;?? ?if(x==3) {?? ??? ?e2.count=e2.count+1;?? ?}?? ?if(x>0) {?? ??? ?e2.count=e2.count+e1.count;?? ?}x=x+1;}System.out.println(e2.count);}}package project2;public class Echo {int count=0;void hello() {?? ?System.out.println("helloooo");}}輸出：helloooohelloooohelloooo10沒(méi)看懂代碼運(yùn)算的過(guò)程，麻煩詳細(xì)點(diǎn)，謝謝。