extendthreaddemo.java

Java网络编程与分布式计算, 主要分析java网络各方面的编程, 提供许多实用安全

// Chapter 7, Listing 1
public class ExtendThreadDemo extends java.lang.Thread
{
	int threadNumber;

	public ExtendThreadDemo ( int num )
	{
		// Assign to member variable
		threadNumber = num;
	}

	// Run method is executed when thread first started
	public void run()
	{
		System.out.println ("I am thread number " + threadNumber);

		try
		{
			// Sleep for five thousand milliseconds (5 secs), to simulate work being done
			Thread.sleep(5000);
		}
		catch (InterruptedException ie) {}

		System.out.println (threadNumber + " is finished!");
	}


	// Main method to create and start threads
	public static void main(String args[])
	{
		System.out.println ("Creating thread 1");

		// Create first thread instance
		Thread t1 = new ExtendThreadDemo(1);

		System.out.println ("Creating thread 2");

		// Create second thread instance
		Thread t2 = new ExtendThreadDemo(2);

		/*
		// Make both threads daemon threads
		t1.setDaemon(true); t2.setDaemon(true);
		*/

		// Start both threads
		t1.start(); t2.start();

		/*
		try
		{
			// Sleep for one second, to allow threads
			// time to display first message
			Thread.sleep(1000);
		}
		catch (InterruptedException ie) {}
		*/
	}
}