我在使用MouseListener
时遇到问题,以便更改面板的颜色,这是行和列中许多其他类似面板的颜色。这是我目前的进展:
import java.awt.*;
import javax.swing.*;
import java.awt.Color.*;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import java.util.Random;
public class Checkers extends JFrame implements MouseListener
{
Random random = new Random();
private final int ROWS = 2;
private final int COLS = 5;
private final int GAP = 2;
private final int NUM = ROWS * COLS;
private int x;
private JPanel pane = new JPanel(new GridLayout(ROWS,COLS, GAP,GAP));
private JPanel pane2 = new JPanel();
private JPanel [] panel = new JPanel[NUM];
private Color col1 = Color.RED;
private Color col2 = Color.WHITE;
private Color tempColor;
public Checkers()
{
super("Checkers");
setSize(600,600);
setVisible(true);
addMouseListener(this);
mouseClicked(null);
setBackground(Color.BLACK);
setBoard();
}
public void setBoard()
// rotates colors on the checkbaord
{
for(int x = 0; x < NUM; x++) {
panel[x] = new JPanel();
pane.add(panel[x]);
if (x % COLS == 0) {
tempColor = col1;
col1 = col2;
col2 = tempColor;}
if (x % 2 == 0) {
panel[x].setBackground(col1);}
else {
panel[x].setBackground(col2);}
}
//pane background colour and the size of this pane.
pane.setBackground(Color.BLACK);
pane.setPreferredSize(new Dimension(300,300));
//pane background colour and size of this pane.
pane2.setBackground(Color.BLACK);
pane2.setPreferredSize(new Dimension(300,300));
//directions on the board where these panes appear.
add(pane, BorderLayout.WEST);
add(pane2, BorderLayout.EAST);
pane2.setLayout(new BoxLayout(pane2, BoxLayout.PAGE_AXIS));
}
@Override
public void mouseClicked(MouseEvent arg0) {
//randomly generate a new color for one of the panes when that pane is clicked.
int r = random.nextInt(255);
int g = random.nextInt(255);
int b = random.nextInt(255);
setBackground(new Color(r, g, b));
}
@Override
public void mouseEntered(MouseEvent arg0) {
}
@Override
public void mouseExited(MouseEvent arg0) {
}
@Override
public void mousePressed(MouseEvent arg0) {
}
@Override
public void mouseReleased(MouseEvent arg0) {
}
}
预期的结果 - 我想要做的是,一旦单击红色或白色面板之一,它会触发mouseClicked
覆盖并将该面板的颜色设置为黑色(当前设置为随机rgb,但不是无论如何工作),所以用户知道这已被按下。剩下的覆盖物都是空的,因为此时它们对我毫无用处。
当前结果 - 程序执行,但单击后窗格颜色不会更改。
这是当前执行程序时的直接图像文件:
欢迎任何帮助。
可能有更好的方法来做你想要的,但一种方法是创建一个自定义的JPanel
类:
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JPanel;
public class MyPanel extends JPanel implements MouseListener {
public MyPanel() {
addMouseListener(this);
}
@Override
public void mouseClicked(MouseEvent e) {
setBackground(Color.BLACK);
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
然后,而不是创建一个常规JPanel
s数组:
private JPanel[] panel = new JPanel[NUM];
您可以创建自定义JPanel
s的数组:
private MyPanel[] panel = new MyPanel[NUM];
自定义JPanel
s都有自己的MouseListener
s所以当点击一个时,它会更新自己。