useexread2.java

java基础教程以及代码 java base document and code

//  异常演示  作除法  使用了  instanceof  eRef.printStackTrace();

import java.io.*;

public class UseExRead2
{
	public static void main(String [] args) throws IOException
	{
		try
		{
			BufferedReader key=new BufferedReader
				(new InputStreamReader(System.in));
			int a=Integer.parseInt(key.readLine());
			int b=Integer.parseInt(key.readLine());
			System.out.println(""+a+" / "+b+" = "+a/b);
		}
		catch (Exception eRef)
		{
			if (eRef instanceof ArithmeticException) 
				System.out.println("Math Error "+eRef.toString());
			if (eRef instanceof NumberFormatException) 
				System.out.println("Format Error "+eRef.toString());
			if (eRef instanceof IOException) 
				System.out.println("IO Error "+eRef.toString());
			eRef.printStackTrace();
		}

	}
}