Java多線程經典案例

Java多線程經典案例

/**
* 典型案例：子線程執行10次，主線程執行100次，兩者交替50次。
*/
package cn.itcast.lesson4;
public class TestWaitNotify {
public static void main(String[] args){
final Business business= new Business();
new Thread(
new Runnable() {
public void run() {
for(int i=1;i<=50;i++){
business.sub(i);
}
}
}
).start();
for(int i=1;i<=50;i++){
business.main(i);
}
}
}
class Business{
private boolean bShouldSub = true;
public synchronized void sub(int i){
//如果bussiness調用sub的話，則【!bShouldSub =false，bShouldSub=true】;
//然後主線程main為等待，執行完sub後就bShouldSub=false；喚醒主線程main。
while(!bShouldSub){
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
for(int j=1;j<=10;j++){
System.out.println("sub thread sequence of "+j+",loop of "+i);
}
bShouldSub = false;
//喚醒main
this.notify();
}
public synchronized void main(int i){
while(bShouldSub){
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
for(int j=1;j<=100;j++){
System.out.println("main thread sequence of "+j+",loop of "+i);
}
bShouldSub = true;
//喚醒sub
this.notify();
}
}

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