下面的示例展示了如何从基于swing的应用程序中的对话框中的列表中获取用户输入。
使用以下API -
JOptionPane
- 创建标准对话框。JOptionPane.showInputDialog()
- 显示带有输入选项的消息警报。option
- 设置列表的输入。
示例
package com.yiibai.swingdemo;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class SwingTester {
public static void main(String[] args) {
createWindow();
}
private static void createWindow() {
JFrame frame = new JFrame("Swing Tester");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createUI(frame);
frame.setSize(560, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void createUI(final JFrame frame){
JPanel panel = new JPanel();
LayoutManager layout = new FlowLayout();
panel.setLayout(layout);
JButton button = new JButton("点击这里~");
final JLabel label = new JLabel();
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String[] options = {"Python", "Java/Swing", "Ruby"};
String result = (String)JOptionPane.showInputDialog(
frame,
"请选择一种语言:",
"Swing下拉列表选择",
JOptionPane.PLAIN_MESSAGE,
null,
options,
options[0]
);
if(result == "Python" || result == "Java/Swing" || result == "Ruby"){
label.setText("您选择了:" + result);
}else {
label.setText("未选择~");
}
}
});
panel.add(button);
panel.add(label);
frame.getContentPane().add(panel, BorderLayout.CENTER);
}
}
执行上面示例代码,得到以下结果: