JAVA I\O流

package dama;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class FileTest {
    public static void main(String[] args){
        File file=new File("word.txt");
        try{
            FileOutputStream out=new FileOutputStream(file);
            byte buy[]="12345abcdef@#%&*软件工程".getBytes();
            out.write(buy);
            out.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    
  try{
      FileInputStream in=new FileInputStream(file);
      byte byt[]=new byte[1024];
      int len=in.read(byt);
      System.out.println("文件中的信息是："+ new String(byt,0,len));
      in.close();
      }catch(Exception e){
          e.printStackTrace();
          }
      }
}