Applet排版布局问题

paradisense 2008-04-03 09:44:27

写了一个这么样的applet的GUI,但是死活运行不出来。难道applet的container不能嵌入panel么？

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

public class GUIGenerator extends JApplet{

private JTextField inputField;
private JLabel promptID;
private JLabel promptResponse;
private JButton sendButton;
private JButton clearButton;
private final int FIELD_WIDTH = 20;
private final int AREA_ROWS = 20;
private final int AREA_COLUMNS = 5;
private JPanel centerPanel;
JPanel bottomPanel;

public void init(){

Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());

createCenterPanel();
createBottomPanel();
promptID = new JLabel("Please input a prompt ID: ");
contentPane.add(promptID,BorderLayout.NORTH);
contentPane.add(centerPanel,BorderLayout.CENTER);
contentPane.add(bottomPanel,BorderLayout.SOUTH);

}
public void createCenterPanel(){

centerPanel = new JPanel();
centerPanel.setLayout(new GridLayout(1,2));

inputField = new JTextField(FIELD_WIDTH);
centerPanel.add(inputField);
sendButton = new JButton("Send");

centerPanel.add(sendButton);

}
public void createBottomPanel(){

bottomPanel = new JPanel();
bottomPanel.setLayout(new GridLayout(3,1));
promptResponse= new JLabel("Server Response: ");
bottomPanel.add(promptResponse);

final JTextArea textArea = new JTextArea(AREA_ROWS, AREA_COLUMNS);
textArea.setEditable(false);
JScrollPane scrollPane = new JScrollPane(textArea);
bottomPanel.add(scrollPane);
clearButton = new JButton("Clear");
bottomPanel.add(clearButton);

}

}

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