4個執行緒例子,2個執行緒對同一數字加法運算另外2個執行緒對同一共享數字減法運算
//具體業務加減方法
public class AddJian {
public int i=0;
public synchronized void add(String threadName) {
i++;
System.out.println(threadName+"加法運算："+i);
}
public synchronized void jian(String threadName) {
i--;
System.out.println(threadName+"減法運算："+i);
}
}
package com.threeti.mecool.web;
//共享資料加10次執行緒
public class AddThread implements Runnable{
private AddJian addJian;
private String threadName;
public AddThread(AddJian addJian,String threadName){
this.addJian=addJian;
this.threadName=threadName;
}
@Override
public void run() {
// TODO Auto-generated method stub
for (int i = 0; i < 10; i++) {
addJian.add(threadName);
}
}
}
package com.threeti.mecool.web;
//共享資料減10次執行緒
public class JianThread implements Runnable{
private AddJian addJian;
private String threadName;
public JianThread(AddJian addJian,String threadName){
this.addJian=addJian;
this.threadName=threadName;
}
@Override
public void run() {
// TODO Auto-generated method stub
for (int i = 0; i < 10; i++) {
addJian.jian(threadName);
}
}
}
package com.threeti.mecool.web;
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
//同一個數字物件
AddJian addJian=new AddJian();
//2個執行緒對同一個數字加法運算
Thread thread1=new Thread(new AddThread(addJian,"thread-01"));
Thread thread2=new Thread(new AddThread(addJian,"thread-02"));
thread1.start();
thread2.start();
//2個執行緒對同一個數字減法運算
Thread thread3=new Thread(new JianThread(addJian,"thread-03"));
Thread thread4=new Thread(new JianThread(addJian,"thread-04"));
thread3.start();
thread4.start();
}
}