keyview.java

来自「Usefull sample codes for Java. Containt 」· Java 代码 · 共 38 行

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class KeyView extends JFrame implements KeyListener {
    JTextField keyText = new JTextField(80);
    JLabel keyLabel = new JLabel("Press any key in the text field.");

    KeyView() {
        super("KeyView");
        setSize(350, 100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        keyText.addKeyListener(this);
        BorderLayout bord = new BorderLayout();
        setLayout(bord);
        add(keyLabel, BorderLayout.NORTH);
        add(keyText, BorderLayout.CENTER);
        setVisible(true);
    }

    public void keyTyped(KeyEvent input) {
        char key = input.getKeyChar();
        keyLabel.setText("You pressed " + key);
    }

    public void keyPressed(KeyEvent txt) {
        // do nothing
    }

    public void keyReleased(KeyEvent txt) {
        // do nothing
    }

    public static void main(String[] arguments) {
        KeyView frame = new KeyView();
    }
}