32.自定义Java异常捕获处理类及其使用

1. 自定义异常捕获处理类

/**  * <h1>异常捕捉</h1>  * */ public class ExceptionHandler implements Thread.UncaughtExceptionHandler {      @Override     public void uncaughtException(Thread t, Throwable e) {          StackTraceElement[] ses = e.getStackTrace();         System.err.println(Exception in thread \ + t.getName() + \  + e.toString()); 		         for (StackTraceElement se : ses) {             System.err.println(\tat  + se);         } 		         Throwable ec = e.getCause();         if (null != ec) {             uncaughtException(t, ec);         }     } } 

2. 使用异常捕获处理类

/**  * <h1>想办法打印完整的异常栈信息</h1>  * */ public class CompleteException {      private void imooc1() throws Exception {         throw new Exception(imooc1 has exception...);     }      private void imooc2() throws Exception {          try {             imooc1();         } catch (Exception ex) {             throw new Exception(imooc2 has exception..., ex);         }     }      private void imooc3() {         try {             imooc2();         } catch (Exception ex) { //            Throwable             throw new RuntimeException(imooc3 has exception..., ex);         }     }      public static void main(String[] args) {             // 默认异常处理 //        try { //            new CompleteException().imooc3(); //        } catch (Exception ex) { //            ex.printStackTrace(); //        }          // 使用自定义异常捕获处理类，打印所有异常信息         Thread.setDefaultUncaughtExceptionHandler(new ExceptionHandler());         new CompleteException().imooc3();     } }