twothread.java

来自「介绍Java多线程编程 有chm格式的电子书及书中源码」· Java 代码 · 共 43 行

public class TwoThread extends Thread {
	private Thread creatorThread;

	public TwoThread() {
		// make a note of the thread that constructed me!
		creatorThread = Thread.currentThread();
	}

	public void run() {
		for ( int i = 0; i < 5; i++ ) {
			printMsg();
			System.out.println("===========================");
			System.out.println("run");
			System.out.println("===========================");
		}
	}

	public void printMsg() {
		// get a reference to the thread running this
		Thread t = Thread.currentThread();//currentThread()方法，返回对当前正在执行的线程对象的引用。

		if ( t == creatorThread ) {
			System.out.println("Creator thread");
		} else if ( t == this ) {
			System.out.println("New thread");
		} else {
			System.out.println("Mystery thread --unexpected!");
		}
	}

	public static void main(String[] args) {
		TwoThread tt = new TwoThread();
		tt.start();

		for ( int i = 0; i < 5; i++ ) {
			tt.printMsg();
			System.out.println("===========================");
			System.out.println("In Main");
			System.out.println("===========================");
		}
	}
}