Java实现多线程异常捕获Runnable的案例

这篇文章主要介绍了详解Java中多线程异常捕获Runnable的实现的相关资料,希望通过本文能帮助到大家，让大家理解掌握这样的知识，需要的朋友可以参考下

详解Java中多线程异常捕获Runnable的实现

1、背景：

Java 多线程异常不向主线程抛，自己处理，外部捕获不了异常。所以要实现主线程对子线程异常的捕获。
2、工具：

实现Runnable接口的LayerInitTask类，ThreadException类，线程安全的Vector
3、思路：

向LayerInitTask中传入Vector，记录异常情况，外部遍历，判断，抛出异常。

4、代码：

package step5.exception;  import java.util.Vector; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit;  import com.autonavi.pds.core.incre.impl.LayerInitTask;  public class ThreadException {    public static void main(String[] args) {     try {       Vector<String> errRet = new Vector();       ExecutorService pool = Executors.newFixedThreadPool(6);       for (int i = 0; i < 6; ++i) {         pool.execute(new LayerInitTask(i, errRet));       }       pool.shutdown();       pool.awaitTermination(1, TimeUnit.DAYS);              if (errRet.size() > 0) {         System.out.println("根据返回值捕获：exception");         throw new RuntimeException( "入库失败！");       }            } catch (Exception e) {       System.out.println("根据抛出异常捕获：exception");       throw new RuntimeException( "入库失败！");     }     System.out.println("-----入库成功，发成功完成工作邮件--------");   }  }

package step5.exception;  import java.util.Vector;  public class LayerInitTask implements Runnable {   private int threadNum;   private Vector<String><p>本文来源gao!%daima.com搞$代*!码9网(</p> errRet;    public LayerInitTask(int num, Vector<String> errRet) {     this.threadNum = num;     this.errRet = errRet;   }    @Override   public void run() {     try {       if (this.threadNum == 3) {         throw new RuntimeException( this.threadNum + ":数据格式有误.");       }       System.out.println(this.threadNum + ":刷表成功");     } catch (Exception e) {       this.errRet.add("线程:" + this.threadNum + "运行异常！");       throw new RuntimeException( this.threadNum + ":刷表失败");     }   }  }

5、结果：

Exception in thread "pool-1-thread-4" java.lang.RuntimeException: 3:刷表失败   at step5.exception.LayerInitTask.run(LayerInitTask.java:23)   at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)   at java.lang.Thread.run(Unknown Source) Exception in thread "main" java.lang.RuntimeException: 入库失败！   at step5.exception.ThreadException.main(ThreadException.java:27) 2:刷表成功 1:刷表成功 5:刷表成功 0:刷表成功 4:刷表成功 根据返回值捕获：exception 根据抛出异常捕获：exception

以上就是Java实现多线程异常捕获Runnable的案例的详细内容，更多请关注搞代码gaodaima其它相关文章！

喜欢 (0)赏

[搞代码]

分享 (0)