ex030201.java

我在学习JAVA的讲义

import java.io.*;
public class Ex030201{
	static char method(char c){
		if ((c>='A') &&  (c<='Z')){
			c=(char)(c-('A'-'a'));
		}
		else if ((c>='a') &&  (c<='z')){
			c=(char)(c+('A'-'a'));
		}
		return c;
	}
	public static void main(String[] args){
		char c=' ';
		try{
			c=(char)System.in.read();
		}catch (IOException e){}
		System.out.println("Converted: "+method(c));
	}
}