Java by API/javax.swing.text/Keymap

Keymap: addActionForKeyStroke(KeyStroke key, Action a)

   <source lang="java">

import javax.swing.*; import javax.swing.text.*; import java.util.Hashtable; import java.awt.event.*; import java.awt.BorderLayout; public class KeymapExample {

 public static void main(String[] args) {
   JTextArea area = new JTextArea(6, 32);
   Keymap parent = area.getKeymap();
   Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);
   KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U, InputEvent.CTRL_MASK);
   Action actionU = new UpWord(); 
   newmap.addActionForKeyStroke(u, actionU);
   Action actionList[] = area.getActions();
   Hashtable lookup = new Hashtable();
   for (int j=0; j < actionList.length; j+=1)
     lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);
   KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L, InputEvent.CTRL_MASK);
   Action actionL = (Action)lookup.get(DefaultEditorKit.selectLineAction);
   newmap.addActionForKeyStroke(L, actionL);
   KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK);
   Action actionW = (Action)lookup.get(DefaultEditorKit.selectWordAction);
   newmap.addActionForKeyStroke(W, actionW);
   area.setKeymap(newmap);
   JFrame f = new JFrame("KeymapExample");
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
   area.setText("www.\n jexp \n .ru.");
   f.pack();
   f.setVisible(true);
 }
 public static class UpWord extends TextAction {
   public UpWord() {
     super("uppercase-word-action");
   }
   public void actionPerformed(ActionEvent e) {
     JTextComponent comp = getTextComponent(e);
     if (comp == null) return;
     Document doc = comp.getDocument();
     int start = comp.getSelectionStart();
     int end = comp.getSelectionEnd();
     try {
       int left = javax.swing.text.Utilities.getWordStart(comp, start);
       int right = javax.swing.text.Utilities.getWordEnd(comp, end);
       String word = doc.getText(left, right-left);
       doc.remove(left, right-left);
       doc.insertString(left, word.toUpperCase(), null);
       comp.setSelectionStart(start); // restore previous position/selection
       comp.setSelectionEnd(end);
     } catch (BadLocationException ble) { return; }
   }
 }

}

      </source>
   
  
 
  

Keymap: removeKeyStrokeBinding(KeyStroke keystroke)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.text.Keymap; public class MainClass {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("Default Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JTextField textField = new JTextField();
   frame.add(textField, BorderLayout.NORTH);
   JPanel panel = new JPanel();
   JButton defaultButton = new JButton("Default Button");
   defaultButton.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       System.out.println(actionEvent.getActionCommand() + " selected");
     }
   });
   panel.add(defaultButton);
   JButton otherButton = new JButton("Other Button");
   otherButton.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       System.out.println(actionEvent.getActionCommand() + " selected");
     }
   });
   panel.add(otherButton);
   frame.add(panel, BorderLayout.SOUTH);
   Keymap keymap = textField.getKeymap();
   KeyStroke keystroke = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, false);
   keymap.removeKeyStrokeBinding(keystroke);
   frame.getRootPane().setDefaultButton(defaultButton);
   frame.setSize(250, 150);
   frame.setVisible(true);
 }

}

      </source>