10.22日总结

1 import javax.swing.*;class AboutException {   public static void main(String[] a)    {      int i=1, j=0, k;      k=i/j; try {    k = i/j;    // Causes division-by-zero exception  //throw new Exception("Hello.Exception!"); }  catch ( ArithmeticException e) {  System.out.println("被0除.  "+ e.getMessage()); }  catch (Exception e) {  if (e instanceof ArithmeticException)   System.out.println("被0除");  else  {     System.out.println(e.getMessage());     } }  finally     {       JOptionPane.showConfirmDialog(null,"OK");     }    }}

 1 public class CatchWho { 
 2     public static void main(String[] args) { 
 3         try { 
 4                 try { 
 5                     throw new ArrayIndexOutOfBoundsException(); 
 6                 } 
 7                 catch(ArrayIndexOutOfBoundsException e) { 
 8                        System.out.println(  "ArrayIndexOutOfBoundsException" +  "/内层try-catch"); 
 9                 }
10  
11             throw new ArithmeticException(); 
12         } 
13         catch(ArithmeticException e) { 
14             System.out.println("发生ArithmeticException"); 
15         } 
16         catch(ArrayIndexOutOfBoundsException e) { 
17            System.out.println(  "ArrayIndexOutOfBoundsException" + "/外层try-catch"); 
18         } 
19     } 
20 }

 1 public class CatchWho2 { 
 2     public static void main(String[] args) { 
 3         try {
 4                 try { 
 5                     throw new ArrayIndexOutOfBoundsException(); 
 6                 } 
 7                 catch(ArithmeticException e) { 
 8                     System.out.println( "ArrayIndexOutOfBoundsException" + "/内层try-catch"); 
 9                 }
10             throw new ArithmeticException(); 
11         } 
12         catch(ArithmeticException e) { 
13             System.out.println("发生ArithmeticException"); 
14         } 
15         catch(ArrayIndexOutOfBoundsException e) { 
16             System.out.println( "ArrayIndexOutOfBoundsException" + "/外层try-catch"); 
17         } 
18     } 
19 }