问题描述
我想在JPanel中添加52个按钮.全部带有ActionListeners.当我达到一定数量(13)并运行该程序时,并不是所有的按钮都显示出来.例如,我添加了15个按钮,但仅显示9个或12个按钮.有时是全部,但并非每次都如此.
I want to add 52 buttons in a JPanel. All with ActionListeners. When I reach a certain amount (13) and run the program, not all of the buttons show up. For example I've added 15 buttons and only 9 or 12 of them show up. Sometimes all of them, but not every time.
这是两个JButton的代码:
Here's the code for two of the JButtons:
JButton button_one=new JButton();
button_one.setPreferredSize(new Dimension(100,150));
mainpanel.add(button_one);
button_one.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent button_1_picked){
amount_of_cards_picked=amount_of_cards_picked+1;
cardamountcheck();
if(twocardspicked==true){
userpick2=0;
System.out.println(setoutcards[userpick2]);
pairdetermination();
}
else if(twocardspicked==false){
userpick1=0;
System.out.println(setoutcards[userpick1]);
}
}
});
JButton button_two = new JButton();
button_two.setPreferredSize(new Dimension(100, 150));
mainpanel.add(button_two);
button_two.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent button_2_picked){
amount_of_cards_picked=amount_of_cards_picked+1;
cardamountcheck();
if(twocardspicked==true){
userpick2=1;
System.out.println(setoutcards[userpick2]);
pairdetermination();
}
else if(twocardspicked==false){
userpick1=1;
System.out.println(setoutcards[userpick1]);
}
}
});
基本上,当单击这些按钮之一时,我的代码中的变量将被更改.这些按钮可以正常运行,并且可以按照我希望的方式正常工作,但是当按钮超过13个时,它们并不会全部显示出来,而我需要52个.
Basically when one of these buttons are clicked, variables in my code get changed.These buttons run fine and work exactly how I want them to, but they don't all appear when there is more than 13 of them, and I need 52.
推荐答案
完成.我创建了一个显示52 JButtons
的GUI.我将它们的尺寸缩小为OP的一半,因此GUI可以更好地解决问题.
Done. I created a GUI that displays 52 JButtons
. I made them half the size of the OP's, so the GUI would fit better in the answer.
在JPanel
上使用GridLayout
相当简单.
这是完整的可运行代码.一个最小的可复制示例.
Here's the complete runnable code. A minimal reproducible example.
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class FiftyTwoJButtonGUI implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new FiftyTwoJButtonGUI());
}
@Override
public void run() {
JFrame frame = new JFrame("52 JButton GUI");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createMainPanel(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JPanel createMainPanel() {
JPanel panel = new JPanel(new GridLayout(0, 13, 5, 5));
panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
CardListener listener = new CardListener();
for (int i = 0; i < 52; i++) {
JButton button = new JButton("" + (i + 1));
button.addActionListener(listener);
button.setPreferredSize(new Dimension(50, 75));
panel.add(button);
}
return panel;
}
public class CardListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent event) {
JButton button = (JButton) event.getSource();
int cardNumber = Integer.valueOf(button.getText());
System.out.println(cardNumber);
}
}
}
这篇关于添加十几个按钮后,并不是所有的JButton都出现.我究竟做错了什么?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!