Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JTextField;

public class Main {
    public static void main(String[] args) {
        JFrame aWindow = new JFrame();

        aWindow.setBounds(50, 100, 300, 300);
        aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTextField typingArea = new JTextField(20);
        typingArea.addKeyListener(new KeyListener() {
            /** Handle the key typed event from the text field. */
            public void keyTyped(KeyEvent e) {
                displayInfo(e, "KEY TYPED: ");
            }

            /** Handle the key pressed event from the text field. */
            public void keyPressed(KeyEvent e) {
                displayInfo(e, "KEY PRESSED: ");
            }

            /** Handle the key released event from the text field. */
            public void keyReleased(KeyEvent e) {
                displayInfo(e, "KEY RELEASED: ");
            }

            protected void displayInfo(KeyEvent e, String s) {
                String keyString, modString, tmpString, actionString, locationString;
                int id = e.getID();
                if (id == KeyEvent.KEY_TYPED) {
                    char c = e.getKeyChar();
                    keyString = "key character = '" + c + "'";
                } else {
                    int keyCode = e.getKeyCode();
                    keyString = "key code = " + keyCode + " (" + KeyEvent.getKeyText(keyCode) + ")";
                }

                int modifiers = e.getModifiersEx();
                modString = "modifiers = " + modifiers;
                tmpString = KeyEvent.getModifiersExText(modifiers);
                if (tmpString.length() > 0) {
                    modString += " (" + tmpString + ")";
                } else {
                    modString += " (no modifiers)";
                }

                actionString = "action key? ";
                if (e.isActionKey()) {
                    actionString += "YES";
                } else {
                    actionString += "NO";
                }

                locationString = "key location: ";
                int location = e.getKeyLocation();
                if (location == KeyEvent.KEY_LOCATION_STANDARD) {
                    locationString += "standard";
                } else if (location == KeyEvent.KEY_LOCATION_LEFT) {
                    locationString += "left";
                } else if (location == KeyEvent.KEY_LOCATION_RIGHT) {
                    locationString += "right";
                } else if (location == KeyEvent.KEY_LOCATION_NUMPAD) {
                    locationString += "numpad";
                } else { // (location == KeyEvent.KEY_LOCATION_UNKNOWN)
                    locationString += "unknown";
                }

                System.out.println(keyString);
                System.out.println(modString);
                System.out.println(actionString);
                System.out.println(locationString);
            }

        });
        aWindow.add(typingArea);
        aWindow.setVisible(true);
    }
}