JPanel比JFrame小 [英] JPanel Smaller than JFrame
问题描述
我从未真正创建过JPanel
,但是在我的JFrame
内部似乎有问题.我的球"对象随机出现在屏幕外,我无法弄清楚为什么会导致我的一生.我实际上并没有创建JPanel
并使用方法对其进行设置,并且不知道如何执行此操作,因为扩展了JPanel
的类仅创建图像.如果您帮助我,我将永远爱您. (我对我缺乏Java知识深表歉意)
I never actually create a JPanel
, but I seem to be having issues with it inside of my JFrame
. my "fball" object goes off the screen at random parts and I cannot figure out why for the life of me. I don't actually create a JPanel
and use the methods to set it up, and dont know how to do that since my class that extends JPanel
only creates an image. If you help me I will love you forever. (I apologize for my lacking of knowledge in java)
这是我的Window Class的代码:
Here is the code for my Window Class:
package game.thirdTry;
import java.awt.BorderLayout;
import java.awt.Graphics;
import javax.swing.JFrame;
public class Window extends JFrame {
private static Window instance;
public static Window getInstance() {
if(instance == null) {
instance = new Window("Game");
}
return instance;
}
private Window(String name) {
super(name);
setSize(1200, 700);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setLayout(null);
addKeyListener(new UserInput());
WindowStructure banner = new WindowStructure("Beatles Logo.jpg", 0, 0, getWidth(), 75);
//WindowStructure fball = new WindowStructure("fireball.100x100.png", 100, 100, 100, 100);
WindowStructure fball = WindowStructure.getInstanceF();
System.out.println("Fball.xSize: " + fball.xSize + ", Fball.ySize: " + fball.ySize);
System.out.println("Fball.xLoc: " + fball.xLoc + ", Fball.yLoc: " + fball.yLoc);
banner.setBounds(banner.xLoc, banner.yLoc, banner.xSize, banner.ySize);
fball.setBounds(fball.xLoc, fball.yLoc, fball.xLoc + fball.xSize, fball.ySize + fball.ySize);
add(fball, null);
add(banner, null);
setVisible(true);
while(true){
System.out.println("Fball.xLoc: " + fball.xLoc + ", Fball.yLoc: " + fball.yLoc);
repaint();
try{
Thread.sleep(100);
}catch (Exception e){
}
}
}
/*
public void paint(Graphics g) {
super.paintComponents(g);
}
*/
}
Image Creation Classs (extends JPanel):
package game.thirdTry;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
public class WindowStructure extends JPanel {
private static WindowStructure fball;
public static WindowStructure getInstanceF(){
if(fball == null){
fball = new WindowStructure("fireball.100x100.png", 300, 100, 100, 100);
}
return fball;
}
ImageIcon imageIcon;
int xLoc, yLoc, xSize, ySize;
public WindowStructure(String bannerImg, int xLoc, int yLoc, int xSize, int ySize){
URL bannerImgURL = getClass().getResource(bannerImg);
imageIcon = new ImageIcon(bannerImgURL);
this.xLoc = xLoc;
this.yLoc = yLoc;
this.xSize = xSize;
this.ySize = ySize;
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.drawImage(imageIcon.getImage(), xLoc, yLoc, xSize, ySize, null);
}
}
推荐答案
我的"fball"对象随机出现在屏幕外,我无法弄清楚为什么会成为我的生命
my "fball" object goes off the screen at random parts and I cannot figure out why for the life of me
fball.setBounds(fball.xLoc, fball.yLoc, fball.xLoc + fball.xSize, fball.ySize + fball.ySize);
为什么要将球"的宽度设置为(位置+尺寸),将高度设置为(尺寸+尺寸)?您不为横幅"做此事
Why are you setting the "fball" width to be (location + size) and height to be (size + size)? You don't do this for the "banner"
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