1 //异常类 2 package st; 3 public class example_1 4 { 5     public static void main(String args[]) 6     { 7         int n=0,m=0,t=1000; 8         try 9         {10             m=Integer.parseInt("8888");11             n=Integer.parseInt("ab89");12             t=7777;  //t没有机会被赋值13         }14         catch(NumberFormatException e)15         {16           System.out.println("发生异常："+    e.getMessage());17         }18         System.out.println("n="+n+",m="+m+",t="+t);19         try20         {21             System.out.println("故意抛出I/O异常！");22             throw new java.io.IOException("我是故意的"); //故意抛出异常23             24         }25         catch(java.io.IOException e)26         {27           System.out.println("发生异常:"+e.getMessage());28         }29     }30 }

/*发生异常：For input string: "ab89"n=0,m=8888,t=1000故意抛出I/O异常！发生异常:我是故意的*/

 

1 package st ; 2  /*  和接口有关的匿名类  */ 3 interface SpeakHello 4 { 5   void speak(); 6 } 7 class HelloMachine 8 { 9     public void turnon(SpeakHello hello)10     {11         hello.speak();12     }13 }14 public class example_115 {16     public static void main(String args[])17     {18      HelloMachine machine =new HelloMachine();19       machine.turnon( new SpeakHello(){20        public void speak(){21          System.out.println("hello ,you are welcome !");22        }23      }24     );25     machine.turnon( new SpeakHello()26     {27         public void speak()28         {29             System.out.println("你好，欢迎光临！");    30         }31     }32     );33     }34 }

 

/*hello ,you are welcome !你好，欢迎光临！*/