線程間共享數據
阿新 • • 發佈：2018-08-23
ack void shared reads over ++ public final incr
package cn.itcast.heima2;
public class MultiThreadShareData {
private static ShareData1 data1 = new ShareData1();
public static void main(String[] args) {
ShareData1 data2 = new ShareData1();
//第二種自定義的Runable方法，繼承了Runable接口
new Thread(new MyRunnable1(data2)).start();
new Thread(new MyRunnable2(data2)).start();
/* 第一種直接覆蓋Runable的run()
* final ShareData1 data1 = new ShareData1();
new Thread(new Runnable(){public void run() {data1.decrement(); }}).start();
new Thread(new Runnable(){public void run() {data1.increment();}}).start();*/
}
}
class MyRunnable1 implements Runnable{
private ShareData1 data1;
public MyRunnable1(ShareData1 data1){
this.data1 = data1;
}
public void run() {
data1.decrement();
}
}
class MyRunnable2 implements Runnable{
private ShareData1 data1;
public MyRunnable2(ShareData1 data1){
this.data1 = data1;
}
public void run() {
data1.increment();
}
}
class ShareData1 /*implements Runnable*/{
/* private int count = 100;
@Override
public void run() {
// TODO Auto-generated method stub
while(true){
count--;
}
}*/
private int j = 0;
public synchronized void increment(){
j++;
}
public synchronized void decrement(){
j--;
}
}線程間共享數據