我在这里有一个 JFrame:
import javax.swing.JFrame;
public class Game extends JFrame {
private static final long serialVersionUID = -7919358146481096788L;
Arena a = new Arena();
public static void main(String[] args) {
new Game();
}
private Game() {
setTitle("Insert name of game here");
setLocationRelativeTo(null);
setLayout(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
add(a);
pack();
setResizable(false);
setVisible(true);
}
private void refresh() {
}
}
这Arena
是一个JPanel:
import java.awt.Dimension;
import javax.swing.JPanel;
public class Arena extends JPanel {
private static final long serialVersionUID = 6499922741928110264L;
byte[][] world = new byte[6000][2000];
int blockPix = 20;
int x = 2999 * blockPix, y = 999 * blockPix;
public Arena() {
setLayout(null);
setMinimumSize(new Dimension(600, 600));
setMaximumSize(new Dimension(600, 600));
setPreferredSize(new Dimension(600, 600));
}
}
然而,JFrame 的大小最终是 0 x 0!