动画在Java中的两个图像 [英] Animating two images in java

问题描述

我很新的到Java。我需要在Java游戏动画两个图像。它的意思是一个飞船游戏允许两个用户控制的对象，使用键盘。我已经部分地实现这一点，但我不明白如何让两个键盘控制，也就是通过键盘输入移动一个对象闪烁了很多。

I'm quite new to java. I need to animate two images on a java game. It's meant to be a spaceship game allowing two users to control the objects, using a keyboard. I've partially implemented this, however I cannot understand how to allow for two keyboard controls, and also the one object that is moving via keyboard input is flickering a lot.

public class MainFrame extends JFrame implements KeyListener {

    MainPanel mPanel;
        MainPanel secondss;
         MainPanel thirdss;
        int speed = 5;
        //ss facing north
        int direction = 0;

    MainFrame() {
        setTitle("spaceship Game");
        mPanel = new MainPanel("C:/img");
                secondss = new MainPanel("C:/img");

        setSize(1024, 768);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(mPanel); // add MainPanel JPanel to JFrame
        setVisible(true); // show class

                add(secondSs);
                add(thirdSs);
                seconds.currentSs.setX(400);
                secondSS.currentSs.setY(100);
    }

   public void actionPerformed( ActionEvent e )
   {
     if( e.getSource() == mPanel)
     {
     }
   }

        @Override
        public void keyPressed(KeyEvent e) {
        if (e.getKeyCode() == e.VK_LEFT) {

         int x = mPanel.currentSs.getX() - speed;
         mPanel.currentSs.setX(x);
        }

        if (e.getKeyCode() == e.VK_RIGHT) {
         int x = mPanel.currentSs.getX() + speed;
         mPanel.currentSs.setX(x);
        }
        if (e.getKeyCode() == e.VK_DOWN) {
         int y = mPanel.currentSs.getY() + speed;
         mPanel.currentSs.setY(y);
        }
        if (e.getKeyCode() == e.VK_UP) {
         int y = mPanel.currentSs.getY() - speed;
         mPanel.currentSs.setY(y);
        }
        //change image direction    
        mPanel.frame = direction;
        }

    public static void main(String[] args) {
        MainFrame mainFrame = new MainFrame();
                mainFrame.addKeyListener(mainFrame);
    }

如果有人可以提供帮助或如果不点我在正确的方向我将不胜感激。

If someone could provide help or if not point me in the right direction I would be grateful.

推荐答案

• JFrame中不可作为焦点的KeyEvent为，则默认情况下从未到的KeyEvent反应

• JFrame isn't focusable for KeyEvents, then by default never to react to KeyEvents

  调用setVisible（真）;应该是最后code线，毕竟JComponent上被添加到JFrame中，

  setVisible(true); should be last code line, after all JComponents are added to JFrame,

  为什么原因是有公共无效的actionPerformed（ActionEvent的五），必须产生错误时抛出的形式compilier

  for why reason is there public void actionPerformed( ActionEvent e ), must generating excpetion form compilier

  
  

  • 创建一个JFrame作为局部变量

  • create a JFrame as local variable

  提出的JPanel进入的JFrame

  put JPanel into JFrame

  覆盖GET preferredSize的JPanel的，为的JFrame的setSize的instesad

  override getPreferredSize for JPanel, instesad of setSize for JFrame

  然后调用包（）和setVisble（真）

  then call pack() and setVisble(true)

  
  

  • 把图像Java包

  • put images to the Java package

  把图像至的JLabel

  put Images to JLabel

  设置为NullLayout JPanel的（否则动画是不可能的）

  set NullLayout to JPanel (otherwise animations isn't possible)

  添加键盘绑定的JPanel，覆盖所需/所需的KeyEvent

  add KeyBindings to JPanel, override desired/required KeyEvents

  
  
  • 有通过使用自定义的绘画，通过重写paintComponent为JPanel的另一种方式，对于这里的KeyEvent保持键绑定为更好的倾听与KeyListener的比较
  
  

  这篇关于动画在Java中的两个图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！