我已经开始学习基础Java并且想要重写一个游戏地图生成器,这个生成器之前是用PHP写的。其中一部分已经正常工作(这只是开始),但是每当我想要展示两个东西(使用.add())时,它只会展示其中一个。以下是我的代码:
public static void main(String[] args) {
JFrame m1 = new JFrame();
Container con = m1.getContentPane();
Color c = new Color(16, 174, 0);
con.setBackground(c);
m1.setSize(mapWidth, mapHeight);
m1.setTitle("ThomasMosey's Map Generator"); // Window Title
m1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
m1.add(new User());
m1.add(new Grid());
m1.setVisible(true);
}
这只是代码的一部分,我想知道在 .add 部分是否有任何错误。
提前感谢您。
以下是完整代码;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JComponent;
import javax.swing.JFrame;
public class Map extends JFrame {
public static int mapWidth = 576; // The Map's Width
public static int mapHeight = 598; // The Map's Height
public static int userX = 1;
public static int userY = 1;
private static final long serialVersionUID = 1L;
public static void main(String[] args) {
JFrame m1 = new JFrame();
Container con = m1.getContentPane();
Color c = new Color(16, 174, 0);
con.setBackground(c);
m1.setSize(mapWidth, mapHeight);
m1.setTitle("ThomasMosey's Map Generator"); // Window Title
m1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
con.add(new User(), BorderLayout.NORTH);
con.add(new Grid(), BorderLayout.CENTER);
m1.setVisible(true);
}
}
// The Grid system
class Grid extends JComponent {
private static final long serialVersionUID = 1L;
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Color gridColor = new Color(0, 84, 12);
g2.setColor(gridColor);
int i;
int i2;
for(i = 50; i <= Map.mapWidth; i += 51) {
g2.drawLine(0, i, Map.mapWidth, i);
}
for(i2 = 50; i2 <= Map.mapHeight; i2 += 51) {
g2.drawLine(i2, 0, i2, Map.mapHeight);
}
}
}
// Drawing the Grid but lower down to give a significant difference to check whether or not it's actually drawing on the JFrame
class User extends JComponent {
private static final long serialVersionUID = 1L;
public void paint(Graphics g2) {
Graphics2D g22 = (Graphics2D) g2;
g22.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Color gridColor = new Color(0, 84, 12);
g22.setColor(gridColor);
int i22;
for(i22 = 50; i22 <= 6000; i22 += 53) {
g22.drawLine(0, i22, Map.mapWidth, i22+1);
}
}
}