java多线程

java多线程的实现方式：
1、继承Thread

[Java] 纯文本查看复制代码

1

2

3

public Thread(Runnable target) {
 init(null, target, "Thread-" + nextThreadNum(), 0);
 }

2、实现Runable

这是Runable的源码所以Runable需要重写run方法

[Java] 纯文本查看复制代码

"color:rgb(79, 79, 79)">""">"font-size:16px">@FunctionalInterface[/size][/font][/color][/p]public interface Runnable {


			    /**
			     * When an object implementing interface Runnable is used
			     * to create a thread, starting the thread causes the object's
			     * run method to be called in that separately executing
			     * thread.
			     * 
			     * The general contract of the method run is that it may
			     * take any action whatsoever.
			     *
			     * @see     java.lang.Thread#run()
			     */
			    public abstract void run();
			}

3、接口通过FutureTask包装器来创建Thread线程

[Java] 纯文本查看复制代码

特点：可以返回值
 
public class FutureTask implements RunnableFuture 
public interface RunnableFuture extends Runnable, Future {
使用Callable方式，需要Futertask的支持
 
    public FutureTask(Callable callable) {
    if (callable == null)
        throw new NullPointerException();
    this.callable = callable;
    this.state = NEW;       // ensure visibility of callable
}