scanner=new Scanner(System.in); int i=scanner.nextInt();

import java.util.Scanner;

public class TryScanner {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        try{
            System.out.println("input int:");
            Scanner scanner=new Scanner(System.in);
            int i=scanner.nextInt();
            System.out.printf("%d\n",i);
        }catch(java.util.InputMismatchException e)
        {
            System.out.println(e.toString());
            System.out.println(e.getMessage());
        }
        System.out.println("exit...");

    }

}

input int:
qq
java.util.InputMismatchException
null
exit...

public class ErrorExceptionDemo {

    /**
     * @param args
     */
    public static void main(String[] args) {
        int i=2;
        try{
            for(int j=-1;i<3;j++)
            {
                int k=i/j;
                System.out.printf("%d\n",k);
            }
        }catch(java.lang.ArithmeticException e)
        {
            System.out.printf("%s\n",e.getMessage());
            System.out.printf("%s\n",e.toString());
        }

    }

}