Java by API/javax.swing/KeyStroke

KeyStroke.getKeyStroke(char ch)

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
public class MainClass {
  public static void main(String args[]) {
    String ACTION_KEY = "The Action";
    
    JFrame frame = new JFrame("KeyStroke Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton buttonA = new JButton("FOCUSED (control alt 7)");
    JButton buttonB = new JButton("FOCUS/RELEASE (VK_ENTER)");
    JButton buttonC = new JButton("ANCESTOR  (VK_F4+SHIFT_MASK)");
    JButton buttonD = new JButton("WINDOW (" ")");
    Action actionListener = new AbstractAction() {
      public void actionPerformed(ActionEvent actionEvent) {
        JButton source = (JButton) actionEvent.getSource();
        System.out.println("Activated: " + source.getText());
      }
    };
    KeyStroke controlAlt7 = KeyStroke.getKeyStroke("control alt 7");
    InputMap inputMap = buttonA.getInputMap();
    inputMap.put(controlAlt7, ACTION_KEY);
    ActionMap actionMap = buttonA.getActionMap();
    actionMap.put(ACTION_KEY, actionListener);
    KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true);
    inputMap = buttonB.getInputMap();
    inputMap.put(enter, ACTION_KEY);
    buttonB.setActionMap(actionMap);
    KeyStroke shiftF4 = KeyStroke.getKeyStroke(KeyEvent.VK_F4,
        InputEvent.SHIFT_MASK);
    inputMap = buttonC
        .getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    inputMap.put(shiftF4, ACTION_KEY);
    buttonC.setActionMap(actionMap);
    KeyStroke space = KeyStroke.getKeyStroke(" ");
    inputMap = buttonD.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    inputMap.put(space, ACTION_KEY);
    buttonD.setActionMap(actionMap);
    frame.setLayout(new GridLayout(2, 2));
    frame.add(buttonA);
    frame.add(buttonB);
    frame.add(buttonC);
    frame.add(buttonD);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

KeyStroke.getKeyStroke("control alt 7")

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
public class MainClass {
  public static void main(String args[]) {
    String ACTION_KEY = "The Action";
    
    JFrame frame = new JFrame("KeyStroke Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton buttonA = new JButton("FOCUSED (control alt 7)");
    JButton buttonB = new JButton("FOCUS/RELEASE (VK_ENTER)");
    JButton buttonC = new JButton("ANCESTOR  (VK_F4+SHIFT_MASK)");
    JButton buttonD = new JButton("WINDOW (" ")");
    Action actionListener = new AbstractAction() {
      public void actionPerformed(ActionEvent actionEvent) {
        JButton source = (JButton) actionEvent.getSource();
        System.out.println("Activated: " + source.getText());
      }
    };
    KeyStroke controlAlt7 = KeyStroke.getKeyStroke("control alt 7");
    InputMap inputMap = buttonA.getInputMap();
    inputMap.put(controlAlt7, ACTION_KEY);
    ActionMap actionMap = buttonA.getActionMap();
    actionMap.put(ACTION_KEY, actionListener);
    KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true);
    inputMap = buttonB.getInputMap();
    inputMap.put(enter, ACTION_KEY);
    buttonB.setActionMap(actionMap);
    KeyStroke shiftF4 = KeyStroke.getKeyStroke(KeyEvent.VK_F4,
        InputEvent.SHIFT_MASK);
    inputMap = buttonC
        .getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    inputMap.put(shiftF4, ACTION_KEY);
    buttonC.setActionMap(actionMap);
    KeyStroke space = KeyStroke.getKeyStroke(" ");
    inputMap = buttonD.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    inputMap.put(space, ACTION_KEY);
    buttonD.setActionMap(actionMap);
    frame.setLayout(new GridLayout(2, 2));
    frame.add(buttonA);
    frame.add(buttonB);
    frame.add(buttonC);
    frame.add(buttonD);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

KeyStroke: getKeyStroke(int keyCode,int modifiers,boolean onKeyRelease)

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
public class MainClass {
  public static void main(String args[]) {
    String ACTION_KEY = "The Action";
    
    JFrame frame = new JFrame("KeyStroke Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton buttonA = new JButton("FOCUSED (control alt 7)");
    JButton buttonB = new JButton("FOCUS/RELEASE (VK_ENTER)");
    JButton buttonC = new JButton("ANCESTOR  (VK_F4+SHIFT_MASK)");
    JButton buttonD = new JButton("WINDOW (" ")");
    Action actionListener = new AbstractAction() {
      public void actionPerformed(ActionEvent actionEvent) {
        JButton source = (JButton) actionEvent.getSource();
        System.out.println("Activated: " + source.getText());
      }
    };
    KeyStroke controlAlt7 = KeyStroke.getKeyStroke("control alt 7");
    InputMap inputMap = buttonA.getInputMap();
    inputMap.put(controlAlt7, ACTION_KEY);
    ActionMap actionMap = buttonA.getActionMap();
    actionMap.put(ACTION_KEY, actionListener);
    KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true);
    inputMap = buttonB.getInputMap();
    inputMap.put(enter, ACTION_KEY);
    buttonB.setActionMap(actionMap);
    KeyStroke shiftF4 = KeyStroke.getKeyStroke(KeyEvent.VK_F4,
        InputEvent.SHIFT_MASK);
    inputMap = buttonC
        .getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    inputMap.put(shiftF4, ACTION_KEY);
    buttonC.setActionMap(actionMap);
    KeyStroke space = KeyStroke.getKeyStroke(" ");
    inputMap = buttonD.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    inputMap.put(space, ACTION_KEY);
    buttonD.setActionMap(actionMap);
    frame.setLayout(new GridLayout(2, 2));
    frame.add(buttonA);
    frame.add(buttonB);
    frame.add(buttonC);
    frame.add(buttonD);
    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}

KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.CTRL_MASK)

import java.awt.BorderLayout;
import java.awt.ruponent;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
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.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
public class MainClass {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Mnemonic/Accelerator Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final Action printAction = new PrintHelloAction();
    JMenuBar menuBar = new JMenuBar();
    JMenu menu = new JMenu("File");
    menuBar.add(menu);
    JMenuItem menuItem = new JMenuItem("Print");
    KeyStroke ctrlP = KeyStroke.getKeyStroke(KeyEvent.VK_P,
        InputEvent.CTRL_MASK);
    menuItem.setAccelerator(ctrlP);
    menuItem.addActionListener(printAction);
    menu.add(menuItem);
    JButton fileButton = new JButton("About");
    fileButton.setMnemonic(KeyEvent.VK_A);
    fileButton.addActionListener(printAction);
    frame.setJMenuBar(menuBar);
    frame.add(fileButton, BorderLayout.SOUTH);
    frame.setSize(300, 100);
    frame.setVisible(true);
  }
}
class PrintHelloAction extends AbstractAction {
  private static final Icon printIcon = new MyIcon();
  PrintHelloAction() {
    super("Print", printIcon);
    putValue(Action.SHORT_DESCRIPTION, "Hello, World");
  }
  public void actionPerformed(ActionEvent actionEvent) {
    System.out.println("Hello, World");
  }
}
class MyIcon implements Icon {
  public int getIconWidth() {
    return 32;
  }
  public int getIconHeight() {
    return 32;
  }
  public void paintIcon(Component c, Graphics g, int x, int y) {
    g.drawString("jexp.ru", 0, 20);
  }
}

KeyStroke.getKeyStroke("N", Event.CTRL_MASK)

import java.awt.Event;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.KeyStroke;
public class MainClass extends JFrame {
  public MainClass() {
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setJMenuBar(menuBar);
    JMenu fileMenu = new JMenu("File");
    JMenu elementMenu = new JMenu("Elements");
    fileMenu.setMnemonic("F");
    elementMenu.setMnemonic("E");
    // Construct the file pull down menu
    newItem = fileMenu.add("New");
    openItem = fileMenu.add("Open");
    closeItem = fileMenu.add("Close");
    fileMenu.addSeparator();
    saveItem = fileMenu.add("Save");
    saveAsItem = fileMenu.add("Save As...");
    JMenu colorMenu = new JMenu("Color");
    fileMenu.addSeparator();
    printItem = fileMenu.add("Print");
    newItem.setAccelerator(KeyStroke.getKeyStroke("N", Event.CTRL_MASK));
    openItem.setAccelerator(KeyStroke.getKeyStroke("O", Event.CTRL_MASK));
    saveItem.setAccelerator(KeyStroke.getKeyStroke("S", Event.CTRL_MASK));
    printItem.setAccelerator(KeyStroke.getKeyStroke("P", Event.CTRL_MASK));
    elementMenu.add(lineItem = new JRadioButtonMenuItem("Line", true));
    elementMenu
        .add(rectangleItem = new JRadioButtonMenuItem("Rectangle", false));
    elementMenu.add(circleItem = new JRadioButtonMenuItem("Circle", false));
    elementMenu.add(curveItem = new JRadioButtonMenuItem("Curve", false));
    ButtonGroup types = new ButtonGroup();
    types.add(lineItem);
    types.add(rectangleItem);
    types.add(circleItem);
    types.add(curveItem);
    lineItem.setAccelerator(KeyStroke.getKeyStroke("L", Event.CTRL_MASK));
    rectangleItem.setAccelerator(KeyStroke.getKeyStroke("E", Event.CTRL_MASK));
    circleItem.setAccelerator(KeyStroke.getKeyStroke("I", Event.CTRL_MASK));
    curveItem.setAccelerator(KeyStroke.getKeyStroke("V", Event.CTRL_MASK));
    elementMenu.addSeparator();
    elementMenu.add(colorMenu); // Add the sub-menu
    colorMenu.add(redItem = new JCheckBoxMenuItem("Red", false));
    colorMenu.add(yellowItem = new JCheckBoxMenuItem("Yellow", false));
    colorMenu.add(greenItem = new JCheckBoxMenuItem("Green", false));
    colorMenu.add(blueItem = new JCheckBoxMenuItem("Blue", true));
    // Add element color accelerators
    redItem.setAccelerator(KeyStroke.getKeyStroke("R", Event.CTRL_MASK));
    yellowItem.setAccelerator(KeyStroke.getKeyStroke("Y", Event.CTRL_MASK));
    greenItem.setAccelerator(KeyStroke.getKeyStroke("G", Event.CTRL_MASK));
    blueItem.setAccelerator(KeyStroke.getKeyStroke("B", Event.CTRL_MASK));
    menuBar.add(fileMenu);
    menuBar.add(elementMenu);
  }
  private JMenuBar menuBar = new JMenuBar();
  // File menu items
  private JMenuItem newItem, openItem, closeItem, saveItem, saveAsItem,
      printItem;
  // Element menu items
  private JRadioButtonMenuItem lineItem, rectangleItem, circleItem, curveItem,
      textItem;
  private JCheckBoxMenuItem redItem, yellowItem, greenItem, blueItem;
  public static void main(String[] args) {
    JFrame aWindow = new MainClass();
    aWindow.setSize(200,200);
    aWindow.setVisible(true);
  }
}