Java

Java 多线程进阶笔记

Java 多线程进阶笔记

线程启动

第三种可以获得结果
继承Thread类, 不能继承其他类.
Runable接口, 扩展性强.

第一种方式

package com.learn2.A10DuoXianCheng;

public class Mythread extends Thread{
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println(getName()+"hello world");
        }
    }
}

Mythread t1 = new Mythread();
t1.setName("t1");
t1.start();

第二种方式

package com.learn2.A10DuoXianCheng;

public class T2Myrun implements Runnable {

    @Override
    public void run() {
        Thread t = Thread.currentThread();
        for (int i = 0; i < 100; i++) {
            System.out.println(t.getName()+"hello world");
        }
    }
}

T2Myrun myrun = new T2Myrun();
Thread t1 = new Thread(myrun);
t1.setName("t1");

第三种方式

package com.learn2.A10DuoXianCheng;

import java.util.concurrent.Callable;

//泛型是结果的类型.
public class MyCallable implements Callable<Integer> {
    @Override
    public Integer call() throws Exception {
        int sum = 0;
        for (int i = 1; i <= 100; i++) {
            sum+=i;
        }
        return sum;
    }
}

//创建Mycallable 继承 Callable接口， 实现 call方法有返回值
//创建Mycallable对象, 创建FutureTask对象(管理多线程执行结果的)
//创建thread对象,启动
MyCallable mc = new MyCallable();
FutureTask<Integer> ft = new FutureTask<>(mc);
Thread t1 = new Thread(ft);
t1.start();
System.out.println(ft.get());

成员方法