线程之间有异常不影响?

[aotian16]

/**
 * 
 */
package pk.testthread;

/**
 * @author admin
 * 
 */
public class TestThread {

	public static String string;

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		Thread thread = new Thread(new Runnable() {

			@Override
			public void run() {
				System.out.println("in son thread : start");

				// NullPointerException
				System.out.println(string.toString());

				System.out.println("in son thread : end");
			}
		});

		System.out.println("in main thread : start");

		thread.start();
		// try {
		// thread.join();
		// } catch (InterruptedException e) {
		// e.printStackTrace();
		// }

		System.out.println("in main thread : end");
	}
}

我还以为有个线程出异常就退出了呢！
书上也没看到这方面的信息！
高手指教下

[qybao]

线程出异常，线程本身退出了，但你这个程序中，主线程没受影响，当然会继续了

[totaka]

* When a Java Virtual Machine starts up, there is usually a single
* non-daemon thread (which typically calls the method named
* <code>main</code> of some designated class). The Java Virtual
* Machine continues to execute threads until either of the following
* occurs:
* <ul>
* <li>The <code>exit</code> method of class <code>Runtime</code> has been
* called and the security manager has permitted the exit operation
* to take place.
* <li>All threads that are not daemon threads have died, either by
* returning from the call to the <code>run</code> method or by
* throwing an exception that propagates beyond the <code>run</code>
* method.
* </ul>

[aotian16]

多谢