我正在尝试制作扫雷器。当我点击 JButton
我想让按钮隐藏起来。我已经完成了这个任务,但按钮并没有覆盖整个 JPanel
. 它总是让顶部的一些面板可见。
我试过设置首选尺寸、垂直和水平对齐。
为什么会这样?我怎样才能解决这个问题?
class canvas extends JFrame {
public static JPanel[] panels;
public static Tile[] tiles;
canvas(int size){
JFrame theGUI = new JFrame();
panels = new JPanel[size*size]; //creates panels and tiles, the tiles contain color, if it is
a bomb ect.
tiles = new Tile[size*size];
Container con = theGUI.getContentPane();
Graphics g;
for(int i = 0; i < panels.length; i++) {
JPanel temp = new JPanel();
temp.setBorder(BorderFactory.createEmptyBorder(0,0,0,0));//adds borders
temp.setBorder(BorderFactory.createLineBorder(Color.black,1));
JButton button = new JButton();
button.setBackground(Color.GRAY);
button.setAlignmentY(0.0f);//tried to see if vertical align would fix it, it didnt
button.setPreferredSize(new Dimension(70,70));
button.addActionListener(new Action() {
public void actionPerformed(ActionEvent event) {
button.setVisible(false);
}
});
temp.add(button);
Tile tempTile = new Tile();
panels[i] = temp;
tiles[i] = tempTile;
tiles[i].color = Color.green;
panels[i].setBackground(tiles[i].color);
con.add(panels[i]);
}
con.setLayout(new GridLayout(size,size));
theGUI.setTitle("mine sweeper");
theGUI.setSize(size*40, size*40);
theGUI.setVisible(true);
}
}
我想解决的问题。
我想你可以用更简单的代码来实现你的目标。你只需要添加 JButton
的直接到一个 JPanel
使用 GridLayout
作为其布局管理器。请看下面的代码。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
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.WindowConstants;
public class MineSweeper implements ActionListener, Runnable {
private JFrame frame;
public void actionPerformed(ActionEvent event) {
Object obj = event.getSource();
if (obj instanceof JButton) {
JButton button = (JButton) obj;
button.setVisible(false);
}
}
public void run() {
showGui();
}
private JButton createButton() {
JButton button = new JButton();
button.setPreferredSize(new Dimension(40, 40));
button.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
button.addActionListener(this);
return button;
}
private JPanel createMineField() {
JPanel mineField = new JPanel(new GridLayout(10, 10));
mineField.setBackground(Color.GREEN);
for (int i = 0; i < 100; i++) {
mineField.add(createButton());
}
return mineField;
}
private void showGui() {
frame = new JFrame("Mine Sweeper");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(createMineField(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
/**
* Start here.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new MineSweeper());
}
}