運用多執行緒的信號燈法進行邊加邊計算！代碼如下
public class JieChen {
public static void main(String args[]){
Sum sum = new Sum();
new Play(sum).start();
new Add(sum).start();
}
}
class Play extends Thread{
Sum sum;
public Play(Sum sum){
this.sum=sum;
}
@Override
public void run() {
for (int i = 1; i <= 20; i++) {
this.sum.s*=i;
this.sum.count++;
this.sum.play(sum.voe);
}
}
}
class Add extends Thread{
Sum sum;
public Add(Sum sum){
this.sum=sum;
}
@Override
public void run() {
for (int i = 1; i <= 20; i++) {
sum.add();
this.sum.sa+=this.sum.s;
}
}
}
class Sum{
int s=1;
int count=0;
long sa=1;
String voe;
boolean flag = true;
public synchronized void play(String voe){
if(!flag){
try{
this.wait();
}catch (InterruptedException e){
e.printStackTrace();
}
}
System.out.println("計算階乘"+count+"!");
this.notifyAll();
this.voe=voe;
this.flag=!this.flag;
}
public synchronized void add(){
if(flag){
try{
this.wait();
}catch (InterruptedException e){
e.printStackTrace();
}
}
System.out.println("加上階乘結果為"+sa);
this.notifyAll();
this.flag=!this.flag;
}
}
運行結果圖
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標籤：java