什么是＆＃34;链式异常工具＆＃34;在java？

Question

我正在阅读来自https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html的Throwable类，但我无法理解链式异常工具。所以有人可以帮助我。

Answer 1

正如Oracle doc所说

Chained Exception Facility

  

Java代码通常会捕获一个异常并抛出另一个异常

这里有TutorialsPoint的例子：

public class Main{
   public static void main (String args[])throws Exception { 
      int n = 20, result = 0;
      try { 
         result = n/0;
         System.out.println("The result is"+result);
      } catch(ArithmeticException ex) { 
         System.out.println ("Arithmetic exception occoured: "+ex);
         try { 
            throw new NumberFormatException(ex);
         } catch(NumberFormatException ex1) {
            System.out.println ("Chained exception thrown manually : "+ex1);
         }
      }
   }
}