jappletframe.java

详细讲解了java的基础知识

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.net.*;

public class JAppletFrame extends JApplet{
 
  JPanel jPanel1 = new JPanel();
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JButton jButton1 = new JButton();
  JPanel jPanel2 = new JPanel();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  GridLayout gridLayout1 = new GridLayout();
  JScrollPane jScrollPane1 = new JScrollPane();
  
  JTextArea jTextArea1 = new JTextArea();
  URL url;
  JButton jButton4 = new JButton();
  JButton jButton5 = new JButton();
  
  AppletContext appletContext;

  

  //建构函数
  public JAppletFrame() {
  }

  //初始化
  public void init() {
    try  {
      myInit();
    }
    catch(Exception e)  {   //异常处理
      e.printStackTrace();
    }
  }

  //组件初始设定
  private void myInit() throws Exception {
    this.setSize(new Dimension(400, 300));
    this.getContentPane ().setLayout(new BorderLayout(5,5));
    jLabel1.setText("URL:");
    jTextField1.setPreferredSize(new Dimension(250, 23));
	
    jButton1.setText("搜寻");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
	
    jButton2.setText("功能一");
    jButton3.setText("功能二");
    jPanel2.setLayout(gridLayout1);
    gridLayout1.setColumns(1);
    gridLayout1.setHgap(5);
    gridLayout1.setRows(6);
    gridLayout1.setVgap(5);
    jButton4.setText("功能三");
    jButton5.setText("功能四");
	
    this.getContentPane().add(jPanel2, BorderLayout.WEST);
    jPanel2.add(jButton2, null);
    jPanel2.add(jButton3, null);
    jPanel2.add(jButton4, null);
    jPanel2.add(jButton5, null);
    this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);
    this.getContentPane().add(jPanel1, BorderLayout.NORTH);
    jPanel1.add(jLabel1, null);
    jPanel1.add(jTextField1, null);
    jPanel1.add(jButton1, null);
    jScrollPane1.getViewport().add(jTextArea1, null); 
    
  }

  //启动applet
  public void start() {
  }

  //停止applet
  public void stop() {
  }

  //释放applet资源
  public void destroy() {
  }

  //取得Applet信息
  public String getAppletInfo() {
    return "Applet Information";
  }

  //取得parameter
  public String[][] getParameterInfo() {
    return null;
  }

  //Application的main(）
  public static void main(String[] args) {
    JAppletFrame applet = new JAppletFrame();
   
    JFrame frame = new JFrame();
    frame.setTitle("JApplet与JFrame的合并");
    frame.getContentPane().add(applet, BorderLayout.CENTER);//将Applet加入到frame中
    applet.init();
    applet.start();
    frame.setSize(400,320);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }

  
  void jButton1_actionPerformed(ActionEvent e) {
  try{
	showStatus("");
    url=new URL(jTextField1.getText ());	
     jTextArea1.append ("搜寻网址--"+"\n"); 
     jTextArea1.append (jTextField1.getText ()+"\n");     
      showStatus("搜寻网址中");
     }catch (MalformedURLException urle)  
	{
      	showStatus("输入网址错误");
      	jTextArea1.append ("错误信息--"+"\n");
    	jTextArea1.append (urle.toString ()+"\n");
	}	 
    
  }
  
}