java 异常处理2

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;
            }

        }
    }

}