、报错信息 ---- 实现一个需求 , 按键 数字 按键 , 让 Canvas 画布中绘制的图像根据按下的数值进行缩放 ; 在 AWT 自定义 Canvas 组件中 , 添加按键事件 , 下面定义的 KeyAdapter...中的 keyPressed 函数不回调 ; addKeyListener(new KeyAdapter() { @Override public.../ KeyListener 监听 , 根本不回调相应的回调函数 ; 将 KeyAdapter / KeyListener 监听器 设置到 JFrame 窗口上 , 此时在该应用中按下对应的按键 , 就会回调...keyPressed 函数 ; public void initKeyListener(JFrame frame) { frame.addKeyListener(new KeyAdapter...(){}) 设置的键盘按键监听 , 即可实现想要的功能 ; JFrame.addKeyListener(new KeyAdapter() { @Override public void keyPressed
实现键盘监听有两个方法,第一个就是实现接口KeyListener,第二个就是继承KeyAdapter,KeyAdapter其实就是实现了刚刚的那个接口而已,只不过是空方法而已。...private class AlgoKeyListener extends KeyAdapter { @Override public void keyReleased(...package ApplicationOfAlgorithm.Probability; import java.awt.*; import java.awt.event.KeyAdapter; import...start(); }); } private void run() { } private class AlgoKeyListener extends KeyAdapter
屏幕为全屏状态时为true */ private boolean fullScreen=false; private final KeyListener keyListener=new KeyAdapter...屏幕为全屏状态时为true */ private boolean fullScreen=false; private final KeyListener keyListener=new KeyAdapter
import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.event.KeyAdapter...new Snake(this); createNode(); this.setBounds(100, 100, WIDTH, HEIGHT); this.addKeyListener(new KeyAdapter
. */ public void keyReleased(KeyEvent e); } KeyListener接口的适配器KeyAdapter public abstract class...KeyAdapter implements KeyListener { /** * Invoked when a key has been typed...has been released. */ public void keyReleased(KeyEvent e) {} } 在jframe中,如果我们要监听键盘按下事件,只需继承KeyAdapter
这个程序实现了关闭窗口的效果 KeyEvent 下图是KeyListener接口的方法,同样的,也有一个类实现了这个接口,叫KeyAdapter,接下来我们直接做一个摁键盘上下左右,然后打印对应的字符串...addKeyListener(new MyKeyMonitor()); setVisible(true); } class MyKeyMonitor extends KeyAdapter
javax.swing.JScrollPane; import javax.swing.border.TitledBorder; import javax.swing.JButton; import java.awt.event.KeyAdapter...new BorderLayout(0, 5)); nameField = new JTextField(); nameField.addKeyListener(new KeyAdapter
//---SnakeControl------------------------- import java.awt.Frame; import java.awt.event.KeyAdapter...; import java.awt.event.KeyEvent; public class SnakeControl extends KeyAdapter{ SnakeModel model
.*; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.image.BufferedImage...setBackground(Color.red); //键盘监听 //设置面板键盘监听 this.addKeyListener(new KeyAdapter
import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter...System.exit(0); } }); tf.addKeyListener(new KeyAdapter...} }); //添加 键盘事件 but.addKeyListener(new KeyAdapter
java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter...} } }); tf.addKeyListener(new KeyAdapter
java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter... } } }); tf.addKeyListener(new KeyAdapter
Frame / JFrame 窗口设置键盘监听 , 为组件设置是无效的 ; 下面是设置键盘监听的核心代码 , 必须要为窗口设置键盘监听 ; frame.addKeyListener(new KeyAdapter...- canvasY); } public void initKeyListener(JFrame frame) { frame.addKeyListener(new KeyAdapter
JAVA里也为java.awt.KeyListener提供了这样一个适配器:java.awt.KeyAdapter。...static void main(String[] args) { JFrame frame = new JFrame(); frame.addKeyListener(new KeyAdapter
\ MouseAdapter //鼠标适配器 KeyAdapter //键盘适配器 ActionListener //动作监听 适配器设计模式: 在使用监听器的时候, 需要定义一个类事件监听器接口....java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter...System.out.println("释放"); System.exit(0); } }); //5.键盘监听 button.addKeyListener(new KeyAdapter
java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter...TextField(40); f.add(label); f.add(textField); //键盘监听事件 textField.addKeyListener(new KeyAdapter
** * 设置组件的监听器 */ private void addListener() { input_total.addKeyListener(new KeyAdapter...input_total_show.setText("$ " + input_total_money); } }); input_count.addKeyListener(new KeyAdapter...System.out.println("个数:" + input_count.getText()); } }); input_msg.addKeyListener(new KeyAdapter
paint(Graphics graphics) {} @Override public void update(Graphics g){} class KeyMoniter extends KeyAdapter...(); g.drawImage(ImageBuffer, 0, 0, this); } 在按键监听里面调用思聪的按键按下和释放方法 class KeyMoniter extends KeyAdapter
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