我正在用Java制作一个基本程序。我让 Input 使用此代码:
package main;
import java.awt.event.KeyEvent;
import java.awt.event.KeyAdapter;
public class Input extends KeyAdapter{
public void keyPressed(KeyEvent ke){
_press[ke.getKeyCode()] = true;
_pressed[ke.getKeyCode()] = true;
}
public void keyReleased(KeyEvent ke){
_press[ke.getKeyCode()] = false;
_released[ke.getKeyCode()] = true;
}
public void update(){
for (int i = 0; i < _press.length; i ++){
_pressed[i] = false;
_released[i] = false;
}
}
/**
* checks if a key is being pressed
* @param key an integer representing a key(Key class recommended)
* @return boolean
*/
public static boolean check(int key){
if (_press[key]) return true; else return false;
}
/**
* checks if a key was pressed
* @param key an integer representing a key(Key class recommended)
* @return boolean
*/
public static boolean pressed(int key){
if (_pressed[key]) return true; else return false;
}
/**
* checks if a key was released
* @param key an integer representing a key(Key class recommended)
* @return boolean
*/
public static boolean released(int key){
if (_released[key]) return true; else return false;
}
protected static boolean[] _press = new boolean[128];
protected static boolean[] _pressed = new boolean[128];
protected static boolean[] _released = new boolean[128];
}
我进行了测试,我得到了一个使用 ArrayList 工作的基本实体系统,一切都很好。
但后来我遇到了图形。
我设置了一个 Jcanvas 类(扩展了 Canvas),但是在将它添加到我的框架后,图形可以正常工作,但我的输入根本不起作用。
canvas = new Jcanvas();
canvas.setSize(width, height);
canvas.setBackground(Color.RED);
frame.add(canvas);
//input
frame.addKeyListener(new Input());
有没有办法解决这个问题,还是我会被图形或输入卡住?
这是我的 Jcanvas 类供参考:
package main;
import java.awt.Canvas;
import java.awt.Graphics;
public class Jcanvas extends Canvas{
static final long serialVersionUID = 42L;
public void paint(Graphics g){
}
public void drawrect(int x, int y, int width, int height){
Graphics g = getGraphics();
//g.setColor(Color.blue);
g.drawRect(x, y, width, height);
}
public void drawfill(Graphics g, int x, int y, int width, int height){
}
}