switchtest3.java

编程之道--java程序设计入门源代码

/*
*分支语句功能测试
*/
import java.io.*;
public class SwitchTest3
{
	public static void main(String[] args)
	{
		String strIn = "";
		InputStreamReader in = new InputStreamReader(System.in);
		BufferedReader buffIn = new BufferedReader(in);
		System.out.print("Please enter a singal lower letter: ");
		try
		{
			strIn = buffIn.readLine();//从命令行读入数据
		}
		catch (IOException e)
		{
    	System.out.println(e.toString());
		}
		char letter = strIn.charAt(0);//将字符串转变成字符型数据
		switch(letter)
		{
			case 'a':
				System.out.println("the letter is a!");
				break;
			case 'b':
				System.out.println("the letter is b!");
				break;
			case 'c':
				System.out.println("the letter is c!");
				break;
			case 'd':
				System.out.println("the letter is d!");
				break;
			default:
				System.out.println("the letter is not between a and d!");
		}
	}
}