import java.io.*;
public class mine{
  public static void main(string argv[]){
  mine m=new mine();
    system.out.println(m.amethod());
  }
public int amethod(){
       try{
           fileinputstream dis =new fileinputstream("hello.txt"); //1，抛出异常
       }catch ( exception ex) {
               system.out.println("no such file found");   //2.catch捕获异常，并执行
               return -1;                                  //4,return 返回
       }finally{
               system.out.println("doing finally");  //3.finally一定会执行，在return之前。
       }
        return 0;
    }
}

运行结果:

c:/java>java   mine
no such file found
doing finally
-1