Java Utililty Methods Swing Key Action

List of utility methods to do Swing Key Action

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Description

The list of methods to do Swing Key Action are organized into topic(s).

Method

booleankeyEventPressed(KeyEvent event, KeyStroke keyStroke)
key Event Pressed 
int targetKeyCode = keyStroke.getKeyCode();
return event.getKeyCode() == targetKeyCode && (event.getModifiers() & KeyEvent.CTRL_MASK) != 0;
StringkeyStrokeToString(final KeyStroke keyStroke)
Returns a nice string representation of the specified key stroke. 
final StringBuilder sb = new StringBuilder(" (");
if (keyStroke.getModifiers() != 0)
    sb.append(KeyEvent.getKeyModifiersText(keyStroke.getModifiers())).append('+');
sb.append(KeyEvent.getKeyText(keyStroke.getKeyCode())).append(')');
return sb.toString();
StringkeyStrokeToString(KeyStroke key)
The KeyStroke.toString() method does not return a string that can be parsed by KeyStroke.getKeyStroke(). 
StringBuffer s = new StringBuffer(50);
int m = key.getModifiers();
if ((m & (InputEvent.SHIFT_DOWN_MASK | InputEvent.SHIFT_MASK)) != 0) {
    s.append("shift ");
if ((m & (InputEvent.CTRL_DOWN_MASK | InputEvent.CTRL_MASK)) != 0) {
    s.append("ctrl ");
if ((m & (InputEvent.META_DOWN_MASK | InputEvent.META_MASK)) != 0) {
    s.append("meta ");
if ((m & (InputEvent.ALT_DOWN_MASK | InputEvent.ALT_MASK)) != 0) {
    s.append("alt ");
if ((m & (InputEvent.BUTTON1_DOWN_MASK | InputEvent.BUTTON1_MASK)) != 0) {
    s.append("button1 ");
if ((m & (InputEvent.BUTTON2_DOWN_MASK | InputEvent.BUTTON2_MASK)) != 0) {
    s.append("button2 ");
if ((m & (InputEvent.BUTTON3_DOWN_MASK | InputEvent.BUTTON3_MASK)) != 0) {
    s.append("button3 ");
switch (key.getKeyEventType()) {
case KeyEvent.KEY_TYPED:
    s.append("typed ");
    s.append(key.getKeyChar() + " ");
    break;
case KeyEvent.KEY_PRESSED:
    s.append("pressed ");
    s.append(getKeyText(key.getKeyCode()) + " ");
    break;
case KeyEvent.KEY_RELEASED:
    s.append("released ");
    s.append(getKeyText(key.getKeyCode()) + " ");
    break;
default:
    s.append("unknown-event-type ");
    break;
return s.toString();
StringkeyStrokeToString(KeyStroke key)
Return a good string representation of the given keystroke, since the toString method returns more garbage than we want to see in a user interface. 
int modifiers = key.getModifiers();
StringBuffer buffer = new StringBuffer();
if ((modifiers & Event.SHIFT_MASK) == Event.SHIFT_MASK) {
    buffer.append("(Shift-");
    buffer.append(KeyEvent.getKeyText(key.getKeyCode()));
    buffer.append(")");
if ((modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) {
...
StringkeyStrokeToString(KeyStroke key)
Return a good string representation of the given keystroke, since the toString method returns more garbage than we want to see in a user interface. 
int modifiers = key.getModifiers();
StringBuffer buffer = new StringBuffer();
if ((modifiers & Event.SHIFT_MASK) == Event.SHIFT_MASK) {
    buffer.append("(Shift-");
    buffer.append(KeyEvent.getKeyText(key.getKeyCode()));
    buffer.append(")");
if ((modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) {
...
ActionmakeCloseAction(final Window window)
make Close Action 
return new AbstractAction() {
    @Override
    public void actionPerformed(ActionEvent e) {
        closeWindowByEvent(window);
};
booleanmatches(Action action, KeyEvent ke)
Return whether a key event matches the mnemonic of a provided action. 
KeyStroke key = (KeyStroke) action.getValue(Action.ACCELERATOR_KEY);
return KeyStroke.getKeyStrokeForEvent(ke).equals(key);
KeyStrokeparseKeyStroke(String keyStroke)
Converts a string to a keystroke. 
if (keyStroke == null) {
    return (null);
int modifiers = 0;
int ch = '\0';
int index = keyStroke.indexOf('+');
for (int i = 0; i < index; i++) {
    switch (Character.toUpperCase(keyStroke.charAt(i))) {
...
KeyStrokeparseKeyStroke(String keyStroke)
Converts a string to a keystroke. 
Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
if (keyStroke == null)
    return null;
int modifiers = 0;
int index = keyStroke.indexOf('+');
if (index != -1) {
    for (int i = 0; i < index; i++) {
        switch (Character.toUpperCase(keyStroke.charAt(i))) {
...
voidpressKey(Component component, int keyCode, int modifier)
press Key 
if (component.getKeyListeners().length > 0) {
    KeyEvent event = new KeyEvent(component, KeyEvent.KEY_PRESSED, 0, modifier, keyCode, (char) keyCode);
    for (int i = 0; i < component.getKeyListeners().length; i++) {
        KeyListener keyListener = component.getKeyListeners()[i];
        keyListener.keyPressed(event);
if (JComponent.class.isInstance(component)) {
...