about.java

希望大家多多交流

package system;

import javax.swing.*;
import java.awt.*;
import java.io.*;

public class About extends JDialog{
  private static final int WIDTH = 300;
  private static final int HEIGHT = 300;

  public About(JFrame owner,String fileName){
    super(owner,true);
    JTextArea content = new JTextArea();
    content.setOpaque(false);
    content.setEditable(false);
    content.setLineWrap(true);

    JScrollPane s = new JScrollPane(content);
    s.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    this.getContentPane().add(s);

    //====================加载文件内容=======================================
    try{
      BufferedReader b =
          new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
      String data;
      while((data = b.readLine()) != null){
        content.append(data);
        content.append("\n");
      }
    }
    catch(FileNotFoundException e){
      e.printStackTrace();
      System.out.println("About.java---没有找到相应的文件！");
    }
    catch(IOException e){
      e.printStackTrace();
    }
  }

  public static void showAboutDialog(JFrame owner,String fileName){
    new About(owner,fileName).show();
  }

  public void show(){
    this.setTitle("关于");
    this.setSize(this.WIDTH,this.HEIGHT);
    this.setResizable(false);

    Dimension s = Toolkit.getDefaultToolkit().getScreenSize();
    int width = s.width;
    int height = s.height;
    this.setLocation((width - this.WIDTH)/2,(height - this.HEIGHT)/2);

    super.show();
  }
}