如何GUI - 使用paintcomponent（）初始化GUI，然后基于鼠标添加GUI
标题说明了一切......我的朋友和我正在这样做，我们不知道为什么Ball.java实际上没有在gamePanel中制作球然后制作GUI。顺便说一句，这是8球池。这是代码：
Driver或Final2
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.awt.event.*;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
public class Final2 implements ActionListener {
JPanel titlePanel, gamePanel, buttonPanel;
JLabel titleLabel, turnLabel, oneTypeLabel, twoTypeLabel;
JButton newGameButton;
int turn;
String oneType,twoType;
public JPanel createContentPane() {
turn = 0;
oneType = "";
twoType = "";
JPanel totalGUI = new JPanel();
totalGUI.setLayout(null);
titlePanel = new JPanel();
titlePanel.setLayout(null);
titlePanel.setLocation(10,0);
titlePanel.setSize(500,100);
totalGUI.add(titlePanel);
titleLabel = new JLabel("8-ball Pool");
titleLabel.setLocation(25,10);
titleLabel.setSize(100,20);
titleLabel.setHorizontalAlignment(0);
titleLabel.setForeground(Color.red);
titlePanel.add(titleLabel);
gamePanel = new gamePanel();
gamePanel.setLayout(null);
gamePanel.setLocation(200,250);
gamePanel.setSize(864,432); //this needs to be turned into 864x432 later
gamePanel.setBorder(BorderFactory.createLineBorder(Color.black));
totalGUI.add(gamePanel);
buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout());
buttonPanel.setLocation(900,40);
buttonPanel.setSize(200,40);
totalGUI.add(buttonPanel);
turnLabel = new JLabel("" + turn);
turnLabel.setHorizontalAlignment(0);
titlePanel.add(turnLabel);
oneTypeLabel = new JLabel(oneType);
oneTypeLabel.setHorizontalAlignment(0);
oneTypeLabel.setForeground(Color.red);
buttonPanel.add(oneTypeLabel);
twoTypeLabel = new JLabel(twoType);
twoTypeLabel.setHorizontalAlignment(0);
twoTypeLabel.setForeground(Color.blue);
buttonPanel.add(twoTypeLabel);
newGameButton = new JButton("New Game");
newGameButton.addActionListener(this);
buttonPanel.add(newGameButton);
return totalGUI;
}
public void actionPerformed(ActionEvent e) {
if(e.getSource() == newGameButton) {
}
}
public static void createAndShowGUI() {
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("8-ball Pool!");
//Create and set up the content pane.
Final gui = new Final();
frame.setContentPane(gui.createContentPane());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1000, 1500);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
} }
的GamePanel
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.awt.event.*;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
public class gamePanel extends JPanel {
private boolean setup = true;
public gamePanel() { setOpaque(true); setBackground(Color.GREEN);
}
public void paintComponent(Graphics g) { /* Graphics2D g2 = (Graphics2D) g; Ellipse2D circle = new Ellipse2D.Double(100 - 18,100
-18,18,18); g2.setColor(Color.BLUE); g2.draw(circle); Rectangle2D rect = new Rectangle2D.Double(100 - 18,100 -5,18,5);
g2.setColor(Color.WHITE); g2.draw(rect); */
super.paintComponent(g); //column 1 //1 /*
g.setColor(Color.BLACK); g.drawOval(624,206,20,20);
g.setColor(Color.YELLOW); g.fillOval(625,207,18,18);
//column 2 //14 g.setColor(Color.BLACK);
g.drawOval(644,196,20,20); g.setColor(Color.GREEN);
g.fillOval(645,197,18,18);
//4 g.setColor(Color.BLACK); g.drawOval(644,216,20,20);
g.setColor(Color.MAGENTA); g.fillOval(645,217,18,18);
g.setColor(Color.WHITE); g.fillRect(645 + 7,217,5,18);
//column 3 //5 g.setColor(Color.BLACK); g.drawOval(664,186,20,20);
g.setColor(Color.ORANGE.darker()); g.fillOval(665,187,18,18);
g.setColor(Color.WHITE); g.fillRect(665 + 7,187,5,18);
//8 g.setColor(Color.BLACK); g.drawOval(664,206,20,20);
g.setColor(Color.BLACK); g.fillOval(665,207,18,18);
//13 g.setColor(Color.BLACK); g.drawOval(664,226,20,20);
g.setColor(Color.ORANGE.darker()); g.fillOval(665,227,18,18);
//column 4 //11 g.setColor(Color.BLACK);
g.drawOval(684,176,20,20); g.setColor(Color.RED);
g.fillOval(685,177,18,18); g.setColor(Color.WHITE); g.fillRect(685
+ 7,177,5,18);
//2 g.setColor(Color.BLACK); g.drawOval(684,196,20,20);
g.setColor(Color.BLUE); g.fillOval(685,197,18,18);
//12 g.setColor(Color.BLACK); g.drawOval(684,216,20,20);
g.setColor(Color.MAGENTA); g.fillOval(685,217,18,18);
//9 (looks suspiciously like solid yellow) g.setColor(Color.BLACK);
g.drawOval(684,236,20,20); g.setColor(Color.YELLOW);
g.fillOval(685,237,18,18); g.setColor(Color.WHITE); g.fillRect(685
+ 7,237,5,18);
//column 5 //7 g.setColor(Color.BLACK);
g.drawOval(704,166,20,20);
g.setColor(Color.ORANGE.darker().darker().darker().darker());
g.fillOval(705,167,18,18);
//10 g.setColor(Color.BLACK); g.drawOval(704,186,20,20);
g.setColor(Color.BLUE); g.fillOval(705,187,18,18);
g.setColor(Color.WHITE); g.fillRect(705 + 7,187,5,18);
//15 g.setColor(Color.BLACK); g.drawOval(704,206,20,20);
g.setColor(Color.ORANGE.darker().darker().darker().darker());
g.fillOval(705,207,18,18); g.setColor(Color.WHITE); g.fillRect(705
+ 7,207,5,18);
//3 g.setColor(Color.BLACK); g.drawOval(704,226,20,20);
g.setColor(Color.RED); g.fillOval(705,227,18,18);
//6 g.setColor(Color.BLACK); g.drawOval(704,246,20,20);
g.setColor(Color.GREEN); g.fillOval(705,247,18,18);
g.setColor(Color.WHITE); g.fillRect(705 + 7,247,5,18);
//the almighty cue ball g.setColor(Color.BLACK);
g.drawOval(304,206,20,20); g.setColor(Color.WHITE);
g.fillOval(305,207,18,18); */ if (setup) {
setup = false;
//column 1
//1
Ball ball1 = new Ball(1,624,206);
this.add(ball1);
this.update(this.getGraphics()); //this breaks everything yay
//column 2
//6
Ball ball6 = new Ball(6,644,196);
//12
Ball ball12 = new Ball(12,644,216);
//column 3
//13
Ball ball13 = new Ball(13,664,186);
//8
Ball ball8 = new Ball(8,664,206);
//5
Ball ball5 = new Ball(5,664,226);
//column 4
//11
Ball ball11 = new Ball(11,684,176);
//2
Ball ball2 = new Ball(2,684,196);
//4
Ball ball4 = new Ball(4,684,216); }
} }
球
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.awt.event.*;
import java.awt.Color;
public class Ball extends gamePanel {
private int xcor,ycor;
private int rxcor,rycor,radius;
private int num;
public Ball(int n,int x,int y) {
num = n;
xcor = x;
ycor = y;
radius = 9;
this.setVisible(true);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
boolean isStriped = (num 8);
int color = num%8;
if (color == 0) {
if (isStriped) {
//8ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.BLACK);
g.fillOval(xcor+1,ycor+1,18,18);
}
else {
//cue ball is 16
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 1) {
if (isStriped) {
//9ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.YELLOW);
g.fillOval(xcor+8,ycor+1,5,18);
}
else {
//1ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.YELLOW);
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 2) {
if (isStriped) {
//10ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.BLUE);
g.fillOval(xcor+8,ycor+1,5,18);
}
else {
//2ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.BLUE);
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 3) {
if (isStriped) {
//11ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.RED);
g.fillOval(xcor+8,ycor+1,5,18);
}
else {
//3ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.RED);
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else{
if (color == 4) {
if (isStriped) {
//12ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.MAGENTA);
g.fillRect(xcor+8,ycor+1,5,18);
}
else {
//4ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.MAGENTA);
g.fillRect(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 5) {
if (isStriped) {
//13ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.ORANGE.darker());
g.fillRect(xcor+8,ycor+1,5,18);
}
else {
//5ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.ORANGE.darker());
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 6) {
if (isStriped) {
//14ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.GREEN);
g.fillOval(xcor+8,ycor+1,5,18);
}
else {
//6ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.GREEN);
g.fillOval(xcor+1,ycor+1,18,18);
}
}
else {
if (color == 7) {
if (isStriped) {
//15ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.WHITE);
g.fillOval(xcor+1,ycor+1,18,18);
g.setColor(Color.ORANGE.darker().darker().darker().darker());
g.fillOval(xcor+8,ycor+1,5,18);
}
else {
//7ball
g.setColor(Color.BLACK);
g.drawOval(xcor,ycor,20,20);
g.setColor(Color.ORANGE.darker().darker().darker().darker());
g.fillOval(xcor+1,ycor+1,18,18);
}
}
}
}
}
}
}
}
}
}
}
2 个答案:
答案 0 :(得分：3)
这就是事情。你不希望一堆JPanel作为球。您应该只使用一个 JPanel进行绘制，并仅使用 对所有球使用一个paintComponent方法。所以你Ball类根本不需要扩展任何。 Ball类应该只是一个保存数据的模型，例如RGB颜色。你还应该在球类中使用Graphics对象作为参数并绘制球的draw方法
public class Ball {
int R, G, B;
boolean striped;
int x, y;
public Ball(int R, int G, int B, boolean striped) {
this.R = R:
this.G = G;
this.B = B;
this.striped = striped;
}
public void drawBall(Graphics g) {
if (isStriped) {
// draw the ball with the values from this class
}
else {
// draw the ball with the values from this class
}
}
}
然后在你正在进行实际绘图的课程中，你想要一个Ball个对象的列表
public class TablePanel extends JPanel {
List<Ball> balls = new ArrayList<Ball>();
public TablePanel(){
makeBalls();
}
public void makeBalls(){
balls.add(new Ball(213, 2, 255, true);
// add more balls
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
for (Ball ball : balls) {
ball.drawBall(g);
}
}
}
你可以看到我所做的只是使用方法ball.drawBall(g);。球会出现。但您还需要指定球的x和y位置。然后，当您需要为球设置动画时，只需更改其x和y字段。
这是一个例子
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class SorryPoolTable extends JPanel{
List<ABall> balls = new ArrayList<ABall>();
public SorryPoolTable(){
makeBalls();
}
public void makeBalls(){
balls.add(new ABall(213, 2, 255, true, 125, 25));
balls.add(new ABall(65, 34, 25, true, 150, 135));
balls.add(new ABall(124, 211, 45, true, 160, 180));
balls.add(new ABall(35, 123, 255, true, 200, 200));
balls.add(new ABall(45, 222, 255, true, 50, 200));
balls.add(new ABall(65, 92, 155, true, 125, 175));
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
for (ABall ball : balls) {
ball.drawBall(g);
}
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 300);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
JFrame frame = new JFrame("Sorry Pool Table");
frame.add(new SorryPoolTable());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
class ABall {
int R, G, B;
boolean striped;
int x, y;
public ABall(int R, int G, int B, boolean striped, int x, int y) {
this.R = R;
this.G = G;
this.B = B;
this.striped = striped;
this.x = x;
this.y = y;
}
public void drawBall(Graphics g) {
g.setColor(new Color(R, G, B));
g.fillOval(x, y, 20, 20);
}
}
<强>更新
MouseMotionListener的示例。这是一个非常简单的例子。棒不旋转或凹陷。请查看Graphics2D tutorial，了解有关如何完成此操作的更复杂的详细信息
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class PoolStick extends JPanel{
int x = 100;
int y = 100;
public PoolStick() {
addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
Point p = e.getPoint();
x = (int)p.getX();
y = (int)p.getY();
repaint();
}
});
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.fillRect(x, y, 5, 200);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 300);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
@Override
public void run() {
JFrame frame = new JFrame("Sorry Pool Table");
frame.add(new PoolStick());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}
答案 1 :(得分：1)
我认为你有两个问题：
-
您不会覆盖 paintComponent() 正常。这是
protected方法，而不是public。如果你添加 然后编译器将对此方法进行@Override注释 抱怨。这是添加此注释的一个非常好的理由 每次你需要覆盖一些方法。 -
Ball课程从gamePanel延伸，因此当您在第一堂课中致电super.paintComponent(g)时，它会在其祖先上调用paintComponent(g)。如果在gamePanel内添加球，那么你将获得一个无限循环，可能会导致堆栈溢出。
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