?? samplechoice.java
字號:
import java.awt.*;
import java.awt.event.*;
public class SampleChoice implements ItemListener {
private Frame f;
private Choice choice;
public void go() {
f = new Frame("Sample Choice");
choice = new Choice();
choice.addItem("First");
choice.addItem("Second");
choice.addItem("Third");
choice.addItemListener(this);
f.add(choice, BorderLayout.CENTER);
f.pack();
f.setVisible(true);
}
public void itemStateChanged(ItemEvent ev) {
String state = "deselected";
if (ev.getStateChange() == ItemEvent.SELECTED) {
state = "selected";
}
System.out.println (ev.getItem() + " " + state);
}
public static void main (String args[]) {
SampleChoice sampleChoice = new SampleChoice();
sampleChoice.go();
}
}
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