梦竹百合

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ComboBoxExample
{
public static void main(String[] args)

{

ComboBoxFrame frame = new ComboBoxFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.show();

}

}
class ComboBoxFrame extends JFrame

{
public ComboBoxFrame()
{

setTitle("ComboBoxExample");

setSize(WIDTH, HEIGHT);


Container contentPane = getContentPane();
//建立容纳组合框的面板
jobsPanel = new JPanel();
//新建组合框
jobsBox = new JComboBox();
jobsBox.setEditable(true);;
jobsBox.addItem("job1");
jobsBox.addItem("job2");
jobsBox.addItem("job3");
jobsBox.addItem("job4");
jobsBox.addItem("job5");
jobsBox.addItem("job6");
//增加事件监听器
jobsBox.addActionListener(new jobsListener());
jobsPanel.add(choiceLabel);
jobsPanel.add(jobsBox);
//建立容纳文本域的面板
JPanel textPanel = new
JPanel();
//新建文本域
myTextField = new JTextField("", 15);
textPanel.add(choosedLabel, BorderLayout.NORTH);
textPanel.add(myTextField, BorderLayout.CENTER);
contentPane.add(jobsPanel, BorderLayout.NORTH);
contentPane.add(textPanel, BorderLayout.CENTER);
}
//事件监听器
private class jobsListener implements ActionListener

{

public void actionPerformed(ActionEvent event)

{

  StringBuffer tempSeletedText = new StringBuffer("");

  Object selectedJob = jobsBox.getSelectedItem();

  String str = (String)selectedJob;

  tempSeletedText.append(str);

  myTextField.setText(tempSeletedText.toString());

}

}


public static final int WIDTH = 300;

public static final int HEIGHT = 150;

public static final JLabel choosedLabel=new JLabel("Job has been choosed:");

public static final JLabel choiceLabel=new JLabel("Job will be choosed:");


private JTextField myTextField;

private JComboBox jobsBox;

private JPanel jobsPanel;

}