我尝试使用cookie.setLocation(x,y)。我将面板的布局设置为null，但似乎不起作用。我究竟做错了什么？当我运行它时，窗口上什么都没有出现。我设置了尺寸，所以不能那样。
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.Timer;
import javax.swing.border.Border;
import java.util.*;
public class menus extends JPanel implements ActionListener{
JPanel p=new JPanel();
JPanel p2=new JPanel();
JLabel lbl=new JLabel();
JLabel lblpr=new JLabel();
Boolean fin=true;
Boolean fin2=true;
Boolean fin3=true;
Boolean fin4=true;
int g=5;
int x=0;
JLabel lbl2=new JLabel();
int seconds=0;
Timer t=new Timer(1000,this);
int counter=0;
ImageIcon image = new ImageIcon();
public menus(){
lblpr=new JLabel("");
p.setLayout(null);
image = new ImageIcon(getClass().getResource(""));
JButton cookie = new JButton(new ImageIcon(getClass().getResource("cookie-1.gif")));
Border emptyBorder = BorderFactory.createEmptyBorder();
p.add(cookie);
JButton b=new JButton("Buy Grandma(40 cookies)");
p.add(b);
cookie.setSize(200,200);
cookie.setLocation(100,100);
b.setSize(200,200);
b.setLocation(100,100);
p.add(lblpr);
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(counter>=40){
if(x<5){
t.start();
counter-=40;
x++;
}else{
JOptionPane.showMessageDialog(null, "You bought a maximum of 5 grandmas. To win the game get 200 cookies!");
}
}else{
JOptionPane.showMessageDialog(null, "Error you do not have enought cookies to buy a grandma");
}
}
});
cookie.setBorder(emptyBorder);
cookie.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
counter++;
if(counter>=200 && fin==true){
fin=false;
JOptionPane.showMessageDialog(null, "Woo.. now... em... idk... exit? "
+ "I mean you must keep on going....."
+ "\nNext goal 10000 can u do it? i dont think u have the balls to do it");
g=1000;
}
if(counter>=10000 && fin2==true){
fin2=false;
JOptionPane.showMessageDialog(null, "Wow... you do got the balls afterall... Well next one is 100000. Ok i dont think you will actually do this one.. "
+ "\ni mean 5 grandmas by ur side only.. well let me give u a little help since we are getting along. I present u the ULTIMATE GRANDMA. This grandma will give you 300 cookies/s so yeah.. \nGood luck and see you at 100000");
g=305;
}
if(counter>=100000 && fin3==true){
fin3=false;
JOptionPane.showMessageDialog(null, "Really? Still playing? jeez... ok i guess the LAST goal is 1 Million.. See you there for ur price. oh yeah heres the BADASS ULTIMATE GRANDMA. 1000 cookies/s.");
g=1305;
}
if(counter>=1000000 && fin4==true){
fin4=false;
JOptionPane.showMessageDialog(null, "Well wow.. you really really did it didnt u? Ok here is ur prize.. press ok to claim");
ImageIcon i=new ImageIcon(getClass().getResource("Screenshot_1.png"));
lblpr.setIcon(i);
}
lbl.setText("You have "+counter+" Cookies!");
}
});
lbl = new JLabel("");
p.add(lbl);
add(p);
}
public void actionPerformed(ActionEvent e){
if(x==1){
counter++;
lbl.setText("You have "+counter+" Cookies!");
}else if(x==2){
counter+=2;
lbl.setText("You have "+counter+" Cookies!");
}else if(x==3){
counter+=3;
lbl.setText("You have "+counter+" Cookies!");
}else if(x==4){
counter+=4;
lbl.setText("You have "+counter+" Cookies!");
}else if(x==5){
counter+=g;
lbl.setText("You have "+counter+" Cookies!");
}
}
public static void main(String Args[]){
menus gui = new menus();
JFrame jf = new JFrame();
jf.setTitle("Yo");
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setSize(1280,720);
jf.setVisible(true);
jf.setResizable(false);
jf.getContentPane().add(gui);
}
}
最佳答案
我在这里看到两种可能性：
删除p
摆脱您的中间p JPanel。
您将使用menus（默认），FlowLayout JPanel添加到p JPanel。
什么都没有告诉menus您的p JPanel的大小是多少，因此它的大小为0/0。
然后将menus添加到内容窗格中，这是可以的，因为内容窗格通常具有默认的BorderLayout。
您的menus面板将填满内容窗格的所有表面，不幸的是，其中没有可见的内容（由于p的首选大小为0）。
因此，删除p，然后直接在menus面板上添加和填充所有组件。
更改menus布局
您也可以只更改默认布局menus：
setLayout(new BorderLayout());
在这里，当您添加
p（默认情况下为BorderLayout.CENTER）时，它将填充menus的整个表面。然后，将
menus添加到内容窗格中（默认情况下为BorderLayout.CENTER）也是如此，因为内容窗格也具有BorderLayout。