ThreadLocal关键字实现每个线程有自己的变量
package com.cppdy;
class Number {
private int num;
public static ThreadLocal<Integer> threadLocal = new ThreadLocal<Integer>() {
@Override
protected Integer initialValue() {
return 0;
}
};
public Number(int num) {
this.num = num;
}
public int getNum() {
int temp = threadLocal.get();
threadLocal.set(temp+1);
int count=threadLocal.get();
return count;
}
}
public class ThreadDemo12 extends Thread {
private Number n;
public ThreadDemo12(Number n) {
this.n = n;
}
@Override
public void run() {
System.out.println(getName() + "--" + n.getNum());
}
public static void main(String[] args) throws Exception {
Number n1 = new Number(0);
ThreadDemo12 mt1 = new ThreadDemo12(n1);
ThreadDemo12 mt2 = new ThreadDemo12(n1);
ThreadDemo12 mt3 = new ThreadDemo12(n1);
mt1.start();
mt2.start();
mt3.start();
}
}