01_Thread中处理未捕获得异常

1.Thread程序终止有两种方式a.)run方法执行结束 b).run中抛出异常,该异常会被Thread的ThreadGroup层顺流向上传    送，到达ThreadGroup root,尤其进行处理

 

2.通过UncaughtExceptionHandler来完成ThreadGroup异常处理的工作

  public class BubbleSortThread extends Thread {

	private int[] numbers;
	
	
	
	public BubbleSortThread(int[] numbers) {
		setUncaughtExceptionHandler(new SimpleThreadExceptionHandler());
		this.numbers = numbers;
	}
	
	@Override
	public void run() {
		
		int index = numbers.length;
		boolean finished = false;
		
		while(!finished){
			index--;
			finished = true;
			
			for(int i=0;i<index;i++){
				
				if(numbers[i] < 0)throw new RuntimeException("不能为负数！");
				
				if(numbers[i] > numbers[i+1]){
					int temp = numbers[i];
					numbers[i] = numbers[i+1];
					numbers[i+1] = temp;
				}
				
				finished = false;
			}
		}
		
System.out.println("run finished.....");
	}

	private static void printArray(int[] numbers){
		
		for(int temp : numbers){
			System.out.print(temp+",");
		}
		System.out.println();
	}

	public static void main(String[] args) {
		int[] numbers = new int[]{3,1,4,7,23,3,45,23};
		Thread t = new BubbleSortThread(numbers);
		t.start();
		
		try {
			t.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		
		printArray(numbers);
		
		int[] numbers2 = new int[]{-3,-1,-4,-7,-23,-3,-45,-23};
		Thread t2 = new BubbleSortThread(numbers2);
		t2.start();
		
		try {
			t2.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		
		printArray(numbers2);
	}

}

class SimpleThreadExceptionHandler implements Thread.UncaughtExceptionHandler{

	public void uncaughtException(Thread t, Throwable e) {
		System.out.println(".....");
		System.out.println("theandName:"+t.getName()+e.getMessage()+e.getStackTrace()[0].getLineNumber()+e.getStackTrace()[0].getFileName());
	}
	
}

 

setUncaughtExceptionHandler(new SimpleThreadExceptionHandler());

   设定Thread的UncaughtExceptionHandler,此Thread的throw异常,都会被SimpleThreadExceptionHandler自动处理