我正在为我正在上的高中类(class)制作/创建一个基于 Java 的游戏,但我不知道它的逻辑。
我想做的目标是制作一个游戏,在 JPanel 上的 24x24 网格中随机生成一个“地形”方 block (因为我发现这是最常见的绘制对象),所有这些都靠它自己无需外部(用户)帮助。
我正在通过“for”循环尝试此操作,该循环将采用“coords[][]”并用值标记某个“虚构”位置,例如:floor。
但是当我运行它时,它所做的只是在 0,0 处绘制第一个 20x20 正方形。
现在我听说/读到 Java 内部没有像 Small Basic 那样的“多维”数组。但我不明白数组中的数组具体是做什么的。对于这方面的一些解释将不胜感激。
此外,任何可以使我的程序变得更容易/更流畅的替代建议将非常感激,因为我目前是一名新手程序员。
我在这些帖子中寻找问题的解决方案,但没有成功。
how to create dynamic two dimensional array in java?
How to insert values in two dimensional array programmaticaly?
how to automatically populate a 2d array with numbers
How to fill a two Dimensional ArrayList in java with Integers?
ArrayList.toArray() method in Java
How can I dynamically add items to a Java array?
Automatic adding of elements to an array
这是应该为我执行此操作但当前失败的代码块:
class gamePanel extends JPanel
{
public gamePanel()
{
setBounds(115,93,480,480);
setBackground(Color.white);
}
private Random generator = new Random();
int floor = 0; //initializes the variable floor to zero for later use
int dirt = 1;
int stone = 2;
int water = 3;
int lava = 4;
int iron = 5;
int gold = 6;
int emerald = 7;
int diamond = 8;
int bedrock = 9;
int width = 24;
int height = 24;
int x, y; // my x & y variables for coordinates
int[][] coords = new int[width][height]; //my array that I want to store the coordinates for later use in painting
int[] terrain = {floor, dirt, stone, water, lava, iron,
gold, emerald, diamond, bedrock}; //my terrain that will determine the color of the paint
public void mapGen() //what should mark/generate the JPanel
{
for(x = 0; x <= width; x++)
{
for(y = 0; y <= height; y++)
{
int z = generator.nextInt(20);// part of the randomization
if(z <= 11)
{
coords[x][y] = terrain[0]; //marks the coordinates as floor
}
else{};
}
}
coords[0][0] = terrain[0]; // sets coordinate 0,0 to floor //need to have these always be floor
coords[24][24] = terrain[0]; // sets coordinate 24,24 to floor //^^^^^^^^^^
}
@Override
public void paintComponent(Graphics g)//what will paint each 20x20 square on the grid what it is assigned
{
super.paintComponent(g);
if(coords[x][y] == terrain[floor])
{
g.setColor(new Color(46,46,46));
g.fillRect((x*20),(y*20),20,20);
}
else{};
}
}//end gamePanel
任何在 Java 编程中不被视为“基本”的术语/代码,如果在响应中得到解释,我们将不胜感激。
请在回复中尽可能详细和具体,因为我仍在学习 Java 及其工作原理。
<小时/>编辑
所以这段代码在某种程度上可以工作,但它没有完成它应该做的事情。
这个程序(至少部分)应该工作的方式是,随着循环的进行,每个单独的 20x20 方 block 都被标记为由“coords[x][y]”表示的特定坐标的特定地形
然后,在标记了坐标之后,它应该返回并分别为“paintComponent”中分配的“地形”绘制每个坐标
在执行此操作时,程序应该创建一个 map 供玩家通过。
相反,它的作用是仅用“terrain[dirt]”覆盖整个 JPanel,而没有其他内容
这是该程序的工作模型及其问题:
import java.awt.*;
import javax.swing.*;
import java.util.*;
public class gamePanel extends JPanel
{
public gamePanel()
{
setBounds(115,93,480,480);
setBackground(Color.white);
}
private Random generator = new Random();
int floor = 0; //initializes the variable floor to zero for later use
int dirt = 1;
int stone = 2;
int water = 3;
int width = 24;
int height = 24;
int x, y; // my x & y variables for coordinates
int[][] coords = new int[width][height]; //my array that I want to store the coordinates for later use in painting
int[] terrain = {floor, dirt, stone, water}; //my terrain that will determine the color of the paint
public void mapGen() //what should mark/generate the JPanel
{
for(x = 0; x <= width; x++)
{
for(y = 0; y <= height; y++)
{
int z = generator.nextInt(20);// part of the randomization
if(z <= 11)
{
coords[x][y] = terrain[0]; //should mark the coordinates as floor
}
if(z == 12)
{
coords[x][y] = terrain[3];//should mark the coordinates as water
}
if(z >= 13 && z <= 17)
{
coords[x][y] = terrain[2];//should mark the coordinates as stone
}
if(z >= 18 && z <= 20)
{
coords[x][y] = terrain[1];//should mark the coordinates as dirt
}
coords[0][0] = terrain[0]; // sets coordinate 0,0 to floor //need to have these always be floor
coords[24][24] = terrain[0]; // sets coordinate 24,24 to floor //^^^^^^^^^^
}
}
}
@Override
public void paintComponent(Graphics g)//what will paint each 20x20 square on the grid what it is assigned
{
super.paintComponent(g);
for(int x = 0; x < width; x++)
{
for(int y = 0; y < height; y++)
{
if(coords[x][y] == terrain[floor])//should paint the floor color at marked coordinates
{
g.setColor(new Color(46,46,46));
g.fillRect((x*20), (y*20), 20, 20);
}
if(coords[x][y] == terrain[dirt]);//should paint the dirt color at marked coordinates
{
g.setColor(new Color(135,102,31));
g.fillRect((x*20), (y*20), 20, 20);
}
if(coords[x][y] == terrain[stone])//should paint the stone color at marked coordinates
{
g.setColor(new Color(196,196,196));
g.fillRect((x*20),(y*20),20,20);
}
if(coords[x][y] == terrain[water])//should paint the water color at marked coordinates
{
g.setColor(new Color(85,199,237));
g.fillRect((x*20),(y*20),20,20);
}
}
}
}//end paintComponent
public static void main(String[] args)
{
gamePanel panel = new gamePanel();
JFrame frame = new JFrame();
frame.setSize(480,480);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(panel);
frame.setVisible(true);
}//end main
}// end gamePanel
最佳答案
两个要点:
- 绘画每次都具有破坏性
paintComponent
被调用时,您需要重新绘制整个组件状态 -
x
和y
不要改变你的paintComponent
,它们与mapGen
后的值相同被称为
相反,您的绘制方法可能看起来更像......
@Override
protected void paintComponent(Graphics g)//what will paint each 20x20 square on the grid what it is assigned
{
super.paintComponent(g);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
if (coords[x][y] == terrain[floor]) {
g.setColor(new Color(46, 46, 46));
g.fillRect((x * 20), (y * 20), 20, 20);
} else ... {
//...
}
}
}
}
参见Painting in AWT and Swing和 Performing Custom Painting了解更多详情
就个人而言,在 mapGen
,我会创建一个 BufferedImage
这是24*20
宽和24*20
高,将所有瓷砖涂在上面和 paintComponent
中方法,绘制图像
基于可运行的示例...
-
mapGen
从未被调用,因此coord
中的值总是0
或`地板 -
for (x = 0; x <= width; x++) {
和for (y = 0; y <= height; y++) {
将导致IndexOutOfBoundsException
因为数组是从零开始的 (0-23
) -
coords[24][24] = terrain[0];
将导致IndexOutOfBoundsException
出于与上述相同的原因。
一旦更正,代码可以生成类似...的内容
关于java - 多维数组java的行和列,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36852964/