JAVA-IO-PrintWriter

package cn.itcast.p2.io.print;

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

public class PrintWriterDemo {

	public static void main(String[] args) throws IOException {
			
		
		BufferedReader bufw=new BufferedReader(new InputStreamReader(System.in));
		PrintWriter print=new PrintWriter(new FileWriter("printout.txt"),true);//autoFlush为true时，  .println   .printf   .format  自动刷新
		
		String line=null;
		while((line=bufw.readLine())!=null){
			if(line.equals("over"))
				break;
			
			print.println(line.toUpperCase());
			//print.flush();
			
		}
		bufw.close();
		print.close();
		
	}

}