相关疑难解决方法(0)

当你按下其中一个方向键时,我试图让球逐渐移动,现在它只是传送.我想要它,以便你可以看到它移动.基于这个例子,我使用的是键绑定,并且有一个名为delta的变量会导致球移动50个像素,但就像我说的那样,只要你按下箭头键,球就会出现50个像素,我想要它就像你要踢球一样,你可以看到它从a点到b点.转到我觉得问题所在的第89行.

package game;

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;

/**
 * @see https://stackoverflow.com/questions/6991648
 * @see https://stackoverflow.com/questions/6887296
 * @see https://stackoverflow.com/questions/5797965
 */
public class LinePanel extends JPanel {
myObject ball;

private Point b1 = new Point(0,0);


private MouseHandler mouseHandler = new MouseHandler();
private Point p1 = new Point(100, 100);
private …

我正在使用本网站的教程- "修正时间步"部分.

这是代码 - http://pastebin.com/QaHgcLaR

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class GameLoopTest extends JFrame implements ActionListener
{
   private GamePanel gamePanel = new GamePanel();
   private JButton startButton = new JButton("Start");
   private JButton quitButton = new JButton("Quit");
   private JButton pauseButton = new JButton("Pause");
   private boolean running = false;
   private boolean paused = false;
   private int fps = 60;
   private int frameCount = 0;
   public GameLoopTest()
   {
      super("Fixed Timestep Game Loop Test");
      Container cp = getContentPane();
      cp.setLayout(new BorderLayout());
      JPanel …

大家好,我正在做一个线程来更新JFrame上的球,所以我重新绘制屏幕......然后将球更新到它的位置......然后再次绘制屏幕......画出球和同样的周期......这是代码

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
   Thread t = new Thread()
   {
     public void run()
     {
         while(true)
         {
             repaint();
             b2.update(ob,2);
             b2.paint(ob.getGraphics());

             b2.setT(b2.getT() + 1);
             try {
                 Thread.sleep(50);
             } catch (InterruptedException ex) {
                 System.out.println("Error in Sleeping");
             }

         }
     }
   };

   t.start();
}

但问题是我没有看到球...屏幕的油漆总是覆盖球,球就像在Jframe下面.

我写了以下代码

   import java.awt.BorderLayout;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

final public class Test
{

    JFrame frame;
    DrawPanel drawPanel;
    boolean up = false;
    boolean down = true;
    boolean left = false;
    boolean right = true;
    private int timeStep = 0;
    private int ballYTravel = 100;
    private int BALL_NUM = 24;

    public static void main(String... args)
    {
        new Test().go();
    }

    private void go()
    {
        frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        drawPanel = new DrawPanel();

        frame.getContentPane().add(BorderLayout.CENTER, drawPanel);

        frame.setResizable(false);
        frame.setSize(800, 600);
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
        moveIt();
    } …