TextField

 

 

import java.awt.*;
import java.io.*;
public class A
{
 public static void main(String args[])throws IOException
 {
  Frame f=new Frame ("查看文件");
  f.setVisible(true);
  TextArea ta=new TextArea(20,50);
  String aline;
  BufferedReader br=new BufferedReader(new FileReader("A.java"));
  while((aline=br.readLine())!=null)
  ta.append(aline+'\n');
  br.close();
  f.add(ta);
  f.pack();
 }
}