printhelloaction.java

The Definitive Guide to Java Swing, Third Edition by John Zukowski (Author) 源码

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

public class PrintHelloAction extends AbstractAction {
  private static final Icon printIcon = new ImageIcon("Print.gif");
  PrintHelloAction() {
    super("Print", printIcon);
    putValue(Action.SHORT_DESCRIPTION, "Hello, World");
  }
  public void actionPerformed(ActionEvent actionEvent) {
    System.out.println("Hello, World");
  }
}