Java6学习笔记10——利用Swing开发文本选择输入框

import javax.swing.JFrame; import javax.swing.JButton;
import javax.swing.JOptionPane;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Flavor extends JFrame implements ActionListener {
public static void main(String arg[]) {
new Flavor();
}
public Flavor() {
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
} );
setLocation(250,150);
Container pane = getContentPane();
pane.setLayout(new FlowLayout());
JButton button = new JButton("Dialog");
button.addActionListener(this);
pane.add(button);
pack();

setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String selection = e.getActionCommand();
if(selection.equals("Dialog")) {
String possibleFlavor[] = { "Vanilla","Chocolate","Rocky Road" };
String favorite = (String)JOptionPane.showInputDialog(this,//定义输入对话框的属性
"Choose your favorite",
"Ice Cream Flavors",
JOptionPane.QUESTION_MESSAGE,
null,
possibleFlavor,
possibleFlavor[0]);
if(favorite == null)
System.out.println("No choice made");
else
System.out.println("Favorite: " + favorite);
}
}
}