java GUI編程(swing)之四swing下拉框，列表框，滾動窗口

下拉框（JComboBox）

列表框（JList）

滾動窗口（JScrollPane）

 

package gui;

import java.awt.GridLayout;

import javax.swing.*;

 

/**

* 下拉框，列表框，窗口滾動

* Created by admin on 2017/7/9.

*/

public class Scroll extends JFrame{

// 定義須要用到的組件

private JList jList;

private JComboBox jComboBox;

private JScrollPane jScrollPane;

private JLabel jLabel, jLabel2;

private JPanel jPanel, jPanel2;

public static void main(String[] args){

Scroll scroll = new Scroll();

}

public Scroll(){

jPanel = new JPanel();

jPanel2 = new JPanel();

jLabel = new JLabel("所在省");

jLabel2 = new JLabel("所在市");

String [] province = {"廣西", "廣東", "湖南"};

// 下拉框

jComboBox = new JComboBox(province);

String [] city = {"南寧", "柳州", "廣州","深圳", "長沙"};

// 列表框

jList = new JList(city);

jList.setVisibleRowCount(3);

// 窗口滾動

jScrollPane = new JScrollPane(jList);

this.setLayout(new GridLayout(2, 1));

jPanel.add(jLabel);

jPanel.add(jComboBox);

 

jPanel2.add(jLabel2);

jPanel2.add(jScrollPane);

 

this.add(jPanel);

this.add(jPanel2);

this.setTitle("Java");

this.setLocation(500, 250);

this.setSize(350, 200);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setVisible(true);

}

}