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我正在尝试对游戏进行编程，但我无法准确地制作我需要的大窗口。第一个 println 给我 720 和第二个 732 并且窗口真的比 720 大。我怎样才能使游戏显示精确到 720 像素高？

xCopterGame.java

import javax.swing.JFrame;
import java.awt.Dimension;
import java.awt.event.*;

public class xCopterGame extends JFrame implements MouseListener{

  private static final long serialVersionUID = 1L;

  Board panel=null;
  public xCopterGame(){
    panel = new Board();
    setTitle("Pong");
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    panel.setPreferredSize(new Dimension(1280,720));
    getContentPane().add(panel);
    pack();
    setLocationRelativeTo(null);
    setVisible(true);
    setResizable(false);

    System.out.println(panel.getHeight());

    panel.yCopter = getHeight()/2-15;

    panel.addMouseListener(this);
    addMouseListener(this);
  }

  public void mousePressed(MouseEvent e) {
    panel.mousePressed(e);
  }

  public void mouseReleased(MouseEvent e) {
    panel.mouseReleased(e);
  }

  public static void main(String[] args) {
    new xCopterGame();
  }


  public void mouseClicked(MouseEvent e) {

  }
  public void mouseEntered(MouseEvent e) {

  }
  public void mouseExited(MouseEvent e) {

  }
}

Board.java

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import javax.swing.JPanel;

public class Board extends JPanel implements Runnable{
  private static final long serialVersionUID = 1L;

  Thread th=null;
  boolean mousePressed = false, firstClick = false;
  int yCopter;

  public Board(){
    th = new Thread(this);
    th.start();
  }

  public void paint(Graphics g){
    super.paint(g);
    this.setBackground(Color.black);
    g.setColor(Color.white);
    g.fillRect(80, yCopter, 30, 30);

    g.setColor(Color.gray);
    for(int i=0; i<37; i++){
      g.drawLine(0, i*20, this.getWidth(), i*20);
    }

    g.fillRect(100, 715, 30, 5);
    g.fillRect(100, 0, 30, 5);       
    System.out.println(this.getHeight());
  }

  public void run() {
    while(true){
      if(mousePressed == true)
        yCopter--;
      if(mousePressed == false && firstClick == true)
        yCopter++;

   //   repaint();

      try { 
        Thread.sleep(10); 
      } 
      catch(InterruptedException ex) {

      }
    }
  }

  public void mousePressed(MouseEvent e) {
    mousePressed = true;
    firstClick = true;
  }
  public void mouseReleased(MouseEvent e) {
    mousePressed = false;
  }
}
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2 回答 2

3

setResizable()可能会影响框架的插图。最好在setResizable(). 试试这个调用顺序：

setResizable(false);
pack();
setVisible(true);

供参考，请参阅@HovercraftFullOfEels 的分析

您可能还会发现我应该避免在 Java Swing 中使用 set[Preferred|Maximum|Minimum]Size 方法吗？有帮助。

于 2013-02-28T23:26:38.463 回答
0

我注意到您只是在设置Board首选尺寸。如果你想为你的窗口强制一个特定的大小，你可以简单地调用JFrame.setSize()you的方法xCopterGame。

我鼓励你看看这个链接。当您使用LayoutManager.

于 2013-02-28T23:26:29.747 回答