Java-源代码-简单例外捕获演练2

finally子句用来说明必须执行的语句,无论TRY程序块中是否抛出例外,FINALLY程序块中的语句都将会被执行..

 

 

public class ExampleFinallyException
{
 public static void main(String[] args)
 {
  System.out.println("Hello World!");
  try
  {
   int x=0;
   int y=28;
   int z=y/x;//除数为零..
   System.out.println("The value of y/x is "+z);
  }
  catch (ArithmeticException e)
  {
   System.out.println("this program has caught an Arithmetic Exception!");
  }
  finally
  {
   System.out.println("Excuting the finally sub sentence!"); 
   try
   {
    String name=null;
    if(name.equals("wangneng"))
     System.out.println("My name is wangneng!");
   }
   catch (Exception e)
   {
    System.out.println("this program has caught an Arithmetic Exception once more! ");
   }
   finally
   {
    System.out.println("Excuting the finally sub sentence once more!");
   }
  }
 }
}
 

 

finally子句通常还可以与break.continue and return语句一起使用．当try程序地中出现了break.continue and return等语句时，程序必须先执行finally子句，才能最终离开程序块．．

class BreakAndFinally
{
 public static void main(String[] args)
 {
  System.out.println("Hello World!");
  while(true)
  {
   try
   {
    System.out.println("this program wanna go out of this while sub sentence by break !");
    break;
   }
   finally
   {
    System.out.println("this program must execute me before leave the while sub sentence");
   }
  }
 }
}