java Swing 之下拉列表控制元件
阿新 • • 發佈:2019-01-06
/** * Java Swing 之下拉列表控制元件 * @author gao */ package com.gao; import java.awt.FlowLayout; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; public class JComboBoxDemo extends JFrame{ public JComboBoxDemo(){ this.setTitle("下拉列表框使用"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setBounds(100,100,250,100); JPanel contentPane=new JPanel(); contentPane.setBorder(new EmptyBorder(5,5,5,5)); this.setContentPane(contentPane); contentPane.setLayout(new FlowLayout(FlowLayout.CENTER,5,5)); JLabel label=new JLabel("證件型別:"); contentPane.add(label); JComboBox comboBox=new JComboBox(); comboBox.addItem("身份證"); comboBox.addItem("駕駛證"); comboBox.addItem("軍官證"); contentPane.add(comboBox); this.setVisible(true); } public static void main(String[]args){ JComboBoxDemo example=new JComboBoxDemo(); } }