Action.SMALL_ICON : Action « javax.swing « Java by API

1. Java by API
2. javax.swing
3. Action

Action.SMALL_ICON

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;
import javax.swing.plaf.metal.MetalIconFactory;

public class MainClass {

  public static void main(String[] a) {
    final int STRING_POSITION = 1;
    Object buttonColors[][] = { { Color.RED, "RED" }, { Color.BLUE, "BLUE" },
        { Color.GREEN, "GREEN" }, { Color.BLACK, "BLACK" }, null, // separator
        { Color.CYAN, "CYAN" } };

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ActionListener actionListener = new TheActionListener();

    JToolBar toolbar = new JToolBar();
    toolbar.setRollover(true);

    for (Object[] color : buttonColors) {
      if (color == null) {
        toolbar.addSeparator();
      } else {
        Icon icon = MetalIconFactory.getTreeComputerIcon();
        JButton button = new JButton(icon);
        button.setActionCommand((String) color[STRING_POSITION]);
        button.addActionListener(actionListener);
        toolbar.add(button);
      }
    }

    Action action = new ShowAction(toolbar);
    JButton button = new JButton(action);
    toolbar.add(button);

    Container contentPane = frame.getContentPane();
    contentPane.add(toolbar, BorderLayout.NORTH);
    JTextArea textArea = new JTextArea();
    JScrollPane pane = new JScrollPane(textArea);
    contentPane.add(pane, BorderLayout.CENTER);
    frame.setSize(350, 150);
    frame.setVisible(true);

  }

  public static class TheActionListener implements ActionListener {
    public void actionPerformed(ActionEvent actionEvent) {
      System.out.println(actionEvent.getActionCommand());
    }
  };

}

class ShowAction extends AbstractAction {
  Component parentComponent;

  public ShowAction(Component parentComponent) {
    super("About");
    putValue(Action.MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    putValue(Action.SMALL_ICON, MetalIconFactory.getFileChooserHomeFolderIcon());

    this.parentComponent = parentComponent;
  }

  public void actionPerformed(ActionEvent actionEvent) {
        JOptionPane.showMessageDialog(parentComponent, "About Swing",
            "About Box V2.0", JOptionPane.INFORMATION_MESSAGE);
  }
}

           
       

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