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 try
20 {
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_1
15 {
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!
*/