innerclasseventuse.java

JAVA编程思想源代码 值得一下 很难找的

package chapter11;

//ComboBoxExample.java

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

public class InnerClassEventUse extends JFrame
{  
	public static final int WIDTH = 300;
	public static final int HEIGHT = 150;
	public static final JLabel choosedLabel=new JLabel("出生月份为:");
	public static final JLabel choiceLabel=new JLabel("选择出生的月份:");

	private JTextField myTextField;
	private JComboBox monthBox;
	private JPanel monthPanel;
	
	public InnerClassEventUse()
	{
		setTitle("ComboBoxExample");
		setSize(WIDTH, HEIGHT);

		Container contentPane = getContentPane();
		
		//建立面板
		monthPanel = new JPanel();

		//新建JComboBox
		monthBox = new JComboBox();
		monthBox.setEditable(true);;
		monthBox.addItem("一月");
		monthBox.addItem("二月");
		monthBox.addItem("三月");
		monthBox.addItem("四月");
		monthBox.addItem("五月");
		monthBox.addItem("六月");
		monthBox.addItem("七月");
		monthBox.addItem("八月");
		monthBox.addItem("九月");
		monthBox.addItem("十月");
		monthBox.addItem("十一月");
		monthBox.addItem("十二月");
		
		//增加事件监听器
		monthBox.addActionListener(new jobsListener());
		monthPanel.add(choiceLabel);
		monthPanel.add(monthBox);

		//建立容纳JTextField的面板
		JPanel textPanel = new JPanel();
		//新建JTextField
		myTextField = new JTextField("", 15);
		textPanel.add(choosedLabel, BorderLayout.NORTH);
		textPanel.add(myTextField, BorderLayout.CENTER);

		contentPane.add(monthPanel, BorderLayout.NORTH);
		contentPane.add(textPanel, BorderLayout.CENTER);
	}

	//内部类实现事件监听器
	private class jobsListener
		implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			StringBuffer tempSeletedText = new StringBuffer("");
			Object selectedJob = monthBox.getSelectedItem();
			String str = (String)selectedJob;
			tempSeletedText.append(str);
			myTextField.setText(tempSeletedText.toString());
		}
	}

	public static void main(String[] args)
	{  
		InnerClassEventUse frame = new InnerClassEventUse();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}