BufferedReader的重要接口ReadLine

package com.xwj.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class TestTransform2 {

	public static void main(String[] args){
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = null;
		try {
			str = br.readLine();
			while(str != null){
				if(str.equalsIgnoreCase("exit")){
					break;
				}
				System.out.println(str.toUpperCase());
				str = br.readLine();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}