【发布时间】:2014-02-06 01:51:59
【问题描述】:
我对 java 编程还是很陌生,所以请帮助我纠正我可能忽略的任何错误或提供有关如何改进此程序的提示。
好的,已经解决了很多问题,现在我有了一个 CardLayout,但我仍然对如何让我的管道显示在里面有疑问。
当我尝试添加刷新率计时器和速度计时器时,我遇到了关于如何声明和初始化布尔变量的问题。
另外,当我编译和运行这个游戏时,我得到了诸如Game$1.class 之类的文件。有没有办法让我清理这个,有人可以解释为什么会这样吗?这些对成品有影响吗? (当游戏被编译并打包成 JAR 时。)
我想在单击播放按钮时将 playerIsReady 设置为 true。从那里开始,当 if 语句为真时,切换到显示管道的面板,并开始在屏幕上移动管道。最好是该管道的 3 个实例,每个实例都在不同的时间开始,但是您可以提供任何帮助都可以。
其中一些代码需要工作,所以我已经注释掉了一些部分并留下了注释。
我对这个游戏的其他问题可以找到here。
这是我的当前代码
Game.java
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.border.EmptyBorder;
import javax.swing.SwingUtilities;
public class Game {
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
// the GUI as seen by the user (without frame)
final CardLayout cl = new CardLayout();
final JPanel gui = new JPanel(cl);
// remove if no border is needed
gui.setBorder(new EmptyBorder(10,10,10,10));
JPanel menu = new JPanel(new GridBagLayout());
JButton playGame = new JButton("Play!");
ActionListener playGameListener = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
cl.show(gui, "game");
}
};
playGame.addActionListener(playGameListener);
Insets margin = new Insets(20, 50, 20, 50);
playGame.setMargin(margin);
menu.add(playGame);
gui.add(menu);
cl.addLayoutComponent(menu, "menu");
final JPanel pipes = new Pipes();
gui.add(pipes);
cl.addLayoutComponent(pipes, "game");
JFrame f = new JFrame("Pipes Game");
f.add(gui);
// Ensures JVM closes after frame(s) closed and
// all non-daemon threads are finished
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
// See https://stackoverflow.com/a/7143398/418556 for demo.
f.setLocationByPlatform(true);
// ensures the frame is the minimum size it needs to be
// in order display the components within it
f.pack();
// should be done last, to avoid flickering, moving,
// resizing artifacts.
f.setVisible(true);
/*if (playerIsReady) {
Timer speed = new Timer(10, new ActionListener() { //pipe speed
@Override
public void actionPerformed(ActionEvent e) {
pipes.move();
}
});
speed.start();
Timer refresh = new Timer(30, new ActionListener() { //refresh rate
@Override
public void actionPerformed(ActionEvent e) {
pipes.repaint();
}
});
refresh.start();
}*/
}
};
// Swing GUIs should be created and updated on the EDT
// http://docs.oracle.com/javase/tutorial/uiswing/concurrency
SwingUtilities.invokeLater(r);
}
}
管道.java
// What import(s) do I need for ArrayList?
public class Pipes {
List<Pipe> pipes = new ArrayList<Pipe>();
public Pipes() {
pipes.add(new Pipe(50, 100));
pipes.add(new Pipe(150, 100));
pipes.add(new Pipe(250, 100));
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
for ( Pipe pipe : pipes ){
pipe.drawPipe(g);
}
}
}
PipeObject.java
import java.awt.Graphics;
public class PipeObject {
//Declare and initialiaze variables
int x1 = 754; //xVal start
int x2 = 75; //pipe width
//total width is 83
int y1 = -1; //yVal start
int y2 = setHeightVal(); //pipe height
int gap = 130; //gap height
public void drawPipe(Graphics g) {
g.clearRect(0,0,750,500); //Clear screen
g.drawRect(x1,y1,x2,y2); //Draw part 1
g.drawRect(x1-3,y2-1,x2+6,25); //Draw part 2
g.drawRect(x1-3,y2+25+gap,x2+6,25); //Draw part 3
g.drawRect(x1,y2+25+gap+25,x2,500-y2-49-gap); //Draw part 4
}
public void move() {
x1--;
}
public int getMyX() { //To determine where the pipe is horizontally
return x1-3;
}
public int getMyY() { //To determine where the pipe is vertically
return y2+25;
}
public int setHeightVal() { //Get a random number and select a preset height
int num = (int)(9*Math.random() + 1);
int val = 0;
if (num == 9)
{
val = 295;
}
else if (num == 8)
{
val = 246;
}
else if (num == 7)
{
val = 216;
}
else if (num == 6)
{
val = 185;
}
else if (num == 5)
{
val = 156;
}
else if (num == 4)
{
val = 125;
}
else if (num == 3)
{
val = 96;
}
else if (num == 2)
{
val = 66;
}
else
{
val = 25;
}
return val;
}
}
【问题讨论】:
-
查看
CardLayout。 -
.java文件中的每个内部类在执行 javac 以将它们转换为字节码时都被视为新的.class。这就是为什么Main$1.class是您看到的第一个内部类。您可以使用java.beans.EventHandler,它不会随机创建类,但请谨慎使用。对于后者,请参阅 example 以获取 CardLayout。 -
为了尽快获得更好的帮助,请发布MCTaRE(经过测试和可读的最小完整示例)。
-
顺便说一句 - 快乐 50+ 代表。现在您可以在 any 问题或答案上留下 cmets。 :)
-
Pipes应该是JPanel类。并且您想使用PipeObject对象而不是Pipe对象。你甚至没有Pipe类
标签: java swing jframe jpanel awt