comboboxevents.java

来自「由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的」· Java 代码 · 共 45 行

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

/*
<APPLET
    CODE = comboboxevents.class
    WIDTH = 300
    HEIGHT = 200 >
</APPLET>
*/

public class comboboxevents extends JApplet implements ItemListener
{
    JComboBox jcombobox = new JComboBox();
    String outString = "";

    public void init() 
    {
        Container contentPane = getContentPane();

        jcombobox.addItem("Item 1");
        jcombobox.addItem("Item 2");
        jcombobox.addItem("Item 3");
        jcombobox.addItem("Item 4");
        jcombobox.addItem("Item 5");

        contentPane.setLayout(new FlowLayout());

        contentPane.add(jcombobox);

        jcombobox.addItemListener(this);
    }

    public void itemStateChanged(ItemEvent e) 
    {
        if(e.getStateChange() == ItemEvent.SELECTED)
            outString += "Selected: " + (String)e.getItem();
        else
            outString += "Deselected: " + (String)e.getItem();

        showStatus(outString);
    }
}