java如何在没有布局管理器的情况下显示JLabel

Question

我正在为一个最终的项目做一个游戏，我需要一个标签，它是一个大的“X”出现在JPAND的中间。我有JPanel出现，但标签不会出现，因为我没有布局管理器，但如果我使用布局管理器，我的整个项目都会改变。这是我必须做的项目，这样你就可以看到我在努力做什么

Create a game that helps new mouse users improve their hand-eye coordination. Within a JFrame, display an array of 48 JPanels in a GridLayout using eight rows and six columns. Randomly display an X on one of the panels. When the user clicks the correct panel(the one displaying the X), remove the X and display it on a different panel. After the user has successfully “hit” the correct panel 10 times, display a congratulation message that includes the user’s percentage(hits divided by clicks). Save the file as JCatchTheMouse.java.

这是我的密码

package CatchTheMouse;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CatchTheMouse extends JFrame implements ActionListener, MouseListener{
    final int ROWS = 8;
    final int COLS = 6;
    final int GAP = 2;
    final int MAX_PANELS = ROWS * COLS;
    int clicks;
    int hits;
    int percentage = 0;
    int width;
    int height;
    int panelX;
    int panelY;
    int whichPanel = (int)(Math.random() * 48 + 1);
    int numberOfPanels = 1;

    JLabel grats = new JLabel("");
    JLabel spot = new JLabel("X");
    JPanel[] panel = new JPanel[MAX_PANELS];
    JPanel pane = new JPanel(new GridLayout(ROWS, COLS, GAP, GAP));
    Font xFont = new Font("Ariel", Font.BOLD, 30);
    Font font = new Font("Ariel", Font.PLAIN, 12);

    public CatchTheMouse() {
        super("Catch the Mouse");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300,300);
        add(spot);
        spot.setFont(xFont);
        add(grats);
        grats.setFont(font);
        add(pane);
        for(int x = 0; x < MAX_PANELS; ++x) {
            panel[x] = new JPanel();
            pane.add(panel[x]);
            panel[x].setBackground(Color.RED);
        }
        pane.setBackground(Color.BLACK);
        panelX = panel[whichPanel].getX();
        panelY = panel[whichPanel].getY();
        width = panel[whichPanel].getWidth() / 2;
        height = panel[whichPanel].getHeight() / 2;
        spot.setBounds(panelX, panelY, width, height);
    }

    public void mouseClicked(MouseEvent e) {
        clicks = e.getClickCount();
    }

    public void mouseEntered(MouseEvent e) {    
    }

    public void mouseExited(MouseEvent e) {
    }

    public void mousePressed(MouseEvent e) {    
    }

    public void mouseReleased(MouseEvent e) {
    }

    public void actionPerformed(ActionEvent e) {
    }

    public static void main(String[] args) {
        CatchTheMouse frame = new CatchTheMouse();
        frame.setVisible(true);
    }
}

Answer 1

制作另一个JPanel并将其放置在第一个JPanel内。将JLabel和Layout添加到第二个JPanel中，即第一个内的一个

相应地设置嵌套-JPanel和其他坐标的位置

Answer 2

你的位置在所有其他面板后面。如果你加上

setComponentZOrder(spot, 0);

这将导致它被绘制在所有其他内容之上

更好的方法是在面板内部绘制x，而不是在面板顶部

编辑：

您可以使用将x添加到特定面板

panel[0].add(spot);