Java输入输出

import java.io.*;public class IoOut {public void writeTo(String s) throws IOException{FileWriter out =  new FileWriter("D:/javaSample/2chapter1/file/file.txt"); PrintWriter write=new PrintWriter(out);write.print(s);write.flush();}public void readIn() throws IOException{FileReader reader=new FileReader("D:/javaSample/2chapter1/file/file.txt");BufferedReader in=new BufferedReader(reader);String s;while((s=in.readLine()) != null){System.out.println("文件内容："+s);}}public static void main(String[] args) throws IOException {// TODO Auto-generated method stubIoOut ioOut=new IoOut();ioOut.writeTo("hi");ioOut.readIn();}}