package exception;public class lianxiti1 {    public static void main(String[] args) {        for(int i=0;i<4;i++){            int  k;            switch(i){                        case 0:                        int zero=0;        try{        k=911/zero;        }        catch(Exception ee)        {            System.out.println("请您输入正确的数字");        }        break;                case 1:        int  b[]=null;        try        {        k = b[0];        }        catch(Exception ee)        {            System.out.println("请您输入正确的数字");        }        break;                case 2:        int c[]=new int[2];       try{        k=c[9];       }       catch(Exception ee)       {           System.out.println("请您输入正确的数字");       }        break;                case 3:        char  ch="abc".charAt(99);        break;            }                }    }}