PrintStream

/*
 * 打印流
 * 字节打印流
 * PrintStream
 * 构造函数可以接收的参数类型
 * 1.file对象。File
 * 2.字符串路径。String
 * 3.字节输出流，Writer
 * 
 * 字符打印流
 * PrintWriter
 * 
 */
public class EncodeStream {
      public static void main(String[] args) throws IOException {
BufferedReader bufr=new BufferedReader(new InputStreamReader(System.in));
//PrintWriter out=new PrintWriter(System.out);//写到控制台
//PrintWriter out=new PrintWriter("G:\\demo.txt");//写到文本里
PrintWriter out=new PrintWriter(new FileWriter("G:\\sds.txt"),true);//自动刷新
String line=null;
while((line=bufr.readLine())!=null){
if("over".equals(line)){
break;
}
out.println(line.toUpperCase());
//out.flush();
}

out.close();
bufr.close();
}     
}