我要用Java制作游戏,我的游戏会有一个菜单。菜单有一个背景和2个JLabel
个对象。我把它们放在单独的类上,传递给一个JFrame
。我的问题是,我在一个框架上加载了其中两个,但其中一个总是被另一个框架隐藏。
这是代码:
@SuppressWarnings("serial")
public class Sistem extends JFrame{
private final int lebar=954;
private final int tinggi=540;
private Image bg;
File gbr=new File("res/a.jpg");
public Sistem(){
this.setTitle("Unknown man Unkown power");
this.setSize(new Dimension(lebar,tinggi));
this.setFocusable(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setResizable(false);
this.setContentPane(new Ngrep());
//this.setContentPane(new Menu());
this.setVisible(true);
//loadfont();
//loadbg();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
new Sistem();
}
});
}
}
@SuppressWarnings("serial")
public class Ngrep extends JPanel{
private int l=954;
private int t=540;
private BufferedImage bg;
File gbr=new File("res/a.jpg");
public Ngrep(){
loadbg();
}
private void loadbg() {
// TODO Auto-generated method stub
try {
bg=ImageIO.read(gbr);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void paint(Graphics g) {
// TODO Auto-generated method stub
super.paint(g);
g.drawImage(bg, 0, 0, l, t, null);
}
}
@SuppressWarnings("serial")
public class Menu extends JPanel implements Runnable,KeyListener{
private int l=954;
private int t=540;
JLabel menu1=new JLabel("MULAI BARU");
JLabel menu2=new JLabel("KELUARRR");
private File fo=new File("res/Mawns.ttf");
JLayeredPane p=new JLayeredPane();
public Menu(){
loadfont();
this.add(menu1);
this.add(menu2);
}
public void loadfont(){
try {
FileInputStream fi=new FileInputStream(fo);
Font f=Font.createFont(Font.TRUETYPE_FONT, fi).deriveFont(Font.TRUETYPE_FONT, 30);
GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
ge.registerFont(f);
menu1.setFont(f);
menu2.setFont(f);
} catch (Exception ex) {
// TODO Auto-generated catch block
ex.printStackTrace();
}
p.setLayout(new GridLayout(2, 3));
menu1.setBounds(0, 0, getWidth(), getHeight());
menu2.setBounds(0, 0+menu1.getHeight(), getWidth(), getHeight());
p.add(menu1, 2);
p.add(menu2, 2);
}
}
我想要的是菜单在背景前面,但仍然可以看到背景。以及如何安排我创建的JLabel
以屏幕为中心。
如何实现所需的布局?
答案 0 :(得分:3)
public class Ngrep extends JPanel{
请注意,由于Ngrep
是 JPanel
,您可以直接向其添加组件,从而使Menu
类成为冗余。
在此SSCCE中看到的东西。
请注意,我最终进行了如此多的更改,因此无法明确记录大部分内容。仔细查看代码,根据原始代码进行检查,检查Java Docs,如果有任何不明白的变化,请问我。
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.URL;
import javax.imageio.ImageIO;
@SuppressWarnings("serial")
public class Sistem extends JFrame {
public Sistem() {
this.setTitle("Unknown man Unkown power");
this.setFocusable(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setContentPane(new Ngrep());
this.setResizable(false);
this.pack();
this.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Sistem();
}
});
}
}
@SuppressWarnings("serial")
class Ngrep extends JPanel {
private int l = 375;
private int t = 150;
private BufferedImage bg;
JLabel menu1 = new JLabel("MULAI BARU");
JLabel menu2 = new JLabel("KELUARRR");
public Ngrep() {
this.add(menu1);
this.add(menu2);
try {
Font f = new Font(Font.MONOSPACED, Font.ITALIC, 30);
menu1.setFont(f);
menu1.setForeground(Color.RED);
menu2.setFont(f);
menu2.setForeground(Color.RED);
URL url = new URL("http://i.stack.imgur.com/OVOg3.jpg");
bg = ImageIO.read(url);
} catch (Exception ex) {
ex.printStackTrace();
}
setLayout(new GridLayout(2, 3));
add(menu1);
add(menu2);
}
public Dimension getPreferredSize() {
return new Dimension(l, t);
}
/*
* For a JComponent, override paintComponent rather than paint
*/
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
// a JPanel IS AN ImageObserver
g.drawImage(bg, 0, 0, getWidth(), getHeight(), this);
}
}
答案 1 :(得分:2)
首先使用JFrame#add
代替JFrame#setContentPane
,除非您打算向该(内容)窗格添加更多组件。
默认情况下,JFrame
会为BorderLayout
使用LayoutManager
。您需要将其更改为您喜欢使用的内容或将每个组件添加到BorderLayout
有关详细信息,请参阅Laying Out Components Within a Container
答案 2 :(得分:0)
解决了,因为我发现我使用paint()而不是paintComponent()。 像这样:
@Override
public void paint(Graphics g) {
// TODO Auto-generated method stub
super.paint(g);
g.drawImage(bg, 0, 0, l, t, this);
}
到此:
@Override
public void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponents(g);
g.drawImage(bg, 0, 0, l, t, this);
}