在Java中移動兩個對象在同一個class上一個JFrame

Question

我有一個正在處理的項目，因為我必須創建兩個對象，每次我在小矩形（紅色）移動時按下鍵盤上的箭頭鍵時，我希望大矩形（藍色）在框架周圍移動離開，一旦大方塊接觸/標記小矩形，屏幕就會刷新，我可以再次移動大矩形來追逐小矩形。 下面是我的主要 class 和 IT class，我在其中實現了兩種形狀。

目標是讓兩個矩形，每次大矩形靠近時小矩形都會在框架中跑開，直到它被標記。 還必須在框架上添加某種分數面板以顯示更新的分數和一個計時器以在玩家開始播放時倒計時。

我需要幫助讓兩個矩形以不同方式移動而不是彼此重疊。 每當第一個矩形靠近它時，我希望第二個矩形在框架周圍移動時移開

`

My class IT

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

public class IT extends JPanel implements ActionListener, KeyListener {
    
    Timer shapeTimer = new Timer(5, this);

    public double xPos = 0, yPos = 0, movementX = 0, movementY = 0;

    public int rectSize = 50;
    public int rectSize2 = 35;

    public int windowWidth;
    int windowHeight;

    public int xBound;
    public int yBound;

    public IT(int w, int h){
        shapeTimer.start();

        addKeyListener(this);
        setFocusable(true);
        setFocusTraversalKeysEnabled(false);

        windowWidth = w;
        windowHeight = h;

        xBound = (windowWidth - rectSize);
        yBound = (windowHeight - rectSize);
    }
    public void paintComponent(Graphics g){
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;

        Rectangle2D movableRect = new Rectangle2D.Double(xPos, yPos, rectSize, rectSize);
        
        g2.setColor(Color.BLUE);
        g2.draw(movableRect);
        
        g2.fill(movableRect);
        
        Rectangle2D movableRect2 = new Rectangle2D.Double(xPos, yPos, rectSize2, rectSize2);
        g2.setColor(Color.RED);
        g2.draw(movableRect2);
        
        g2.fill(movableRect2);
     
    }

    public void actionPerformed(ActionEvent e){
        repaint();

        xPos += movementX;
        yPos += movementY;
    }

    public void moveUp(){
        if (yPos == 0){
            movementY = 0;
            movementX = 0;
        }
        movementY = -0.5;
        movementX = 0;
    }

    public void moveDown(){
        if (yPos == yBound){
            movementY = 0;
            movementX = 0;              
        }
        movementY = 0.5;
        movementX = 0;
    }
    public void moveLeft()
    {        
        if (xPos == 0){
            movementY = 0;
            movementX = 0;              
        }         
        movementX = -0.5;
        movementY = 0;
    }

    public void moveRight(){
        if (xPos == xBound)
        {
            movementY = 0;
            movementX = 0;
        }
            
        movementX = 0.5;
        movementY = 0;
    }

    public void enlargeSquare(){
        rectSize++;
        
        rectSize2++;
    }

    public void shrinkSquare(){
        rectSize--;
        
        rectSize2--;
    }

    public void keyPressed(KeyEvent e){
        int keyCode = e.getKeyCode();

        if (keyCode == KeyEvent.VK_UP){
            moveUp();
        }

        if (keyCode == KeyEvent.VK_DOWN){
            moveDown();
        }

        if (keyCode == KeyEvent.VK_RIGHT){
            moveRight();
        }

        if (keyCode == KeyEvent.VK_LEFT){
            moveLeft();
        }

        if (keyCode == KeyEvent.VK_OPEN_BRACKET)
        {
            shrinkSquare();
        }

        if (keyCode == KeyEvent.VK_CLOSE_BRACKET)
        {
            enlargeSquare();
        }
    }


    public void keyTyped(KeyEvent e){

    }

    public void keyReleased(KeyEvent e){
       int keyCode = e.getKeyCode();

        if (keyCode == KeyEvent.VK_UP){
            movementX = 0;
            movementY = 0;
        }

        if (keyCode == KeyEvent.VK_DOWN){
            movementX = 0;
            movementY = 0;
        }

        if (keyCode == KeyEvent.VK_RIGHT){
            movementX = 0;
            movementY = 0;
        }

        if (keyCode == KeyEvent.VK_UP){
            movementX = 0;
            movementY = 0;
        }               
    }

}

` MainTester class

`

import javax.swing.*;

import javax.swing.JFrame;

public class MainTester {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int frameWidth = 850;
        int frameHeight = 650;

        JFrame frmMain = new JFrame();
        frmMain.setSize(frameWidth, frameHeight);

        IT it = new IT(frameWidth, frameHeight);      
        frmMain.add(it);

        frmMain.setVisible(true);
        frmMain.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frmMain.setTitle("Tag Game");

    }

}

`

Answer 1

使用鍵綁定，說真的，這將解決 swagger 與KeyListener相關的問題。

解耦和分離你的邏輯。 每個“實體”應該是一個獨立的工作單元。 在您的情況下，它們至少應包含有關顏色、位置和大小的信息。

為簡單起見，我從一些可以塗漆的東西開始......

public interface Entity {
    public void paint(Graphics2D g2d);
}

現在，你可以有很多不同的interface來反映它，它可以被繪制、移動、控制、代表效果或任何你需要的東西——然后你的類應該實現他們需要的interface 。 然后，您的引擎只處理它想要的“概念”——在需要時需要所有“可繪制”實體，需要所有“可移動”實體等。

接下來我創建了一個“玩家”的概念。 玩家是一個“可繪制”實體，但可以通過某種方式由玩家控制，因此它采用當前 state 的“輸入”並根據這些狀態更新自身（更多信息即將到來）

public static class PlayerEntity implements Entity {
    
   protected static final int DELTA = 2;
    
    private Rectangle bounds = new Rectangle(0, 0, 35, 35);
    private Color fillColor;

    public PlayerEntity(Color fillColor, Point location) {
        this.fillColor = fillColor;
        this.bounds.setLocation(location);
    }

    public Color getFillColor() {
        return fillColor;
    }

    public Rectangle getBounds() {
        return bounds;
    }
    
    public Point getCenter() {
        return new Point((int)getBounds().getCenterX(), (int)getBounds().getCenterY());
    }
    
    public void update(Set<PlayerAction> actions, Dimension size) {
        Rectangle currentBounds = getBounds();
        int x = currentBounds.x;
        int y = currentBounds.y;
        
        if (actions.contains(PlayerAction.UP)) {
            y -= DELTA;
        }
        if (actions.contains(PlayerAction.DOWN)) {
            y += DELTA;
        }
        if (actions.contains(PlayerAction.LEFT)) {
            x -= DELTA;
        }
        if (actions.contains(PlayerAction.RIGHT)) {
            x += DELTA;
        }
        
        if (y < 0) {
            y = 0;
        }
        if (y + currentBounds.height > size.height) {
            y = size.height - currentBounds.height;
        }
        if (x < 0) {
            x = 0;
        }
        if (x + currentBounds.width > size.width) {
            x = size.width - currentBounds.width;
        }
        
        getBounds().setLocation(x, y);
    }

    @Override
    public void paint(Graphics2D g2d) {
        g2d.setColor(getFillColor());
        g2d.fill(getBounds());
    }
    
}

作為參考， PlayerAction表示玩家可以執行的所有有效動作，為了簡單起見，我只堅持移動：

public enum PlayerAction {
    UP, DOWN, LEFT, RIGHT;
}

接下來我創建了一個“怪物”實體，在這種情況下，“怪物”將始終嘗試並跟隨玩家，此實現大致基於Java：將圖像移向鼠標 position

public static class MonsterEntity implements Entity {
    protected static final int DELTA = 1;

    private Rectangle bounds = new Rectangle(0, 0, 15, 15);
    private Color fillColor;

    public MonsterEntity(Color fillColor, Point location) {
        this.fillColor = fillColor;
        this.bounds.setLocation(location);
    }

    public Color getFillColor() {
        return fillColor;
    }

    public Rectangle getBounds() {
        return bounds;
    }
            
    public Point getCenter() {
        return new Point((int)getBounds().getCenterX(), (int)getBounds().getCenterY());
    }

    public void moveTowards(Point target) {
        Rectangle bounds = getBounds();
        Point center = getCenter();
        int xDelta = target.x < center.x ? -DELTA : DELTA;
        int yDelta = target.y < center.y ? -DELTA : DELTA;
        
        getBounds().setLocation(bounds.x + xDelta, bounds.y + yDelta);
    }

    @Override
    public void paint(Graphics2D g2d) {
        g2d.setColor(getFillColor());
        g2d.fill(getBounds());
    }
}

怪物總是試圖將它的中心移動到目標位置（最終將成為玩家的中心）

現在，這就是事情變得復雜的地方。

我們需要：

我們可以在其上繪制玩家和怪物的可渲染表面
輸入綁定
更新實體的 state 和安排重繪的“游戲循環”

為簡單起見，我從JPanel開始，使用 Swing Timer和鍵綁定 API。

public class MainPane extends JPanel {
    
    // This represents the "input bindings", these represent
    // abstract actions which can be applied to the player
    // or game state.
    private enum InputKey {
        PRESSED_UP, PRESSED_DOWN, PRESSED_LEFT, PRESSED_RIGHT,
        RELEASED_UP, RELEASED_DOWN, RELEASED_LEFT, RELEASED_RIGHT;
        
        public KeyStroke getKeyStroke() {
            switch (this) {
                case PRESSED_UP: return KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false);
                case PRESSED_DOWN: return KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, false);
                case PRESSED_LEFT: return KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, false);
                case PRESSED_RIGHT: return KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, false);
                case RELEASED_UP: return KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, true);
                case RELEASED_DOWN: return KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, true);
                case RELEASED_LEFT: return KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, true);
                case RELEASED_RIGHT: return KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, true);
            }
            return null;
        }
    }
    
    private PlayerEntity playerEntity;
    private MonsterEntity monsterEntity;
    private Timer timer;
    
    private Set<PlayerAction> actions = new HashSet<PlayerAction>();
    
    public MainPane() {
        InputMap inputMap = getInputMap(WHEN_IN_FOCUSED_WINDOW);
        ActionMap actionMap = getActionMap();
        
        inputMap.put(InputKey.PRESSED_UP.getKeyStroke(), InputKey.PRESSED_UP);
        inputMap.put(InputKey.PRESSED_DOWN.getKeyStroke(), InputKey.PRESSED_DOWN);
        inputMap.put(InputKey.PRESSED_LEFT.getKeyStroke(), InputKey.PRESSED_LEFT);
        inputMap.put(InputKey.PRESSED_RIGHT.getKeyStroke(), InputKey.PRESSED_RIGHT);
        inputMap.put(InputKey.RELEASED_UP.getKeyStroke(), InputKey.RELEASED_UP);
        inputMap.put(InputKey.RELEASED_DOWN.getKeyStroke(), InputKey.RELEASED_DOWN);
        inputMap.put(InputKey.RELEASED_LEFT.getKeyStroke(), InputKey.RELEASED_LEFT);
        inputMap.put(InputKey.RELEASED_RIGHT.getKeyStroke(), InputKey.RELEASED_RIGHT);
        
        actionMap.put(InputKey.PRESSED_UP, new MoveAction(actions, PlayerAction.UP, true));
        actionMap.put(InputKey.PRESSED_DOWN, new MoveAction(actions, PlayerAction.DOWN, true));
        actionMap.put(InputKey.PRESSED_LEFT, new MoveAction(actions, PlayerAction.LEFT, true));
        actionMap.put(InputKey.PRESSED_RIGHT, new MoveAction(actions, PlayerAction.RIGHT, true));
        actionMap.put(InputKey.RELEASED_UP, new MoveAction(actions, PlayerAction.UP, false));
        actionMap.put(InputKey.RELEASED_DOWN, new MoveAction(actions, PlayerAction.DOWN, false));
        actionMap.put(InputKey.RELEASED_LEFT, new MoveAction(actions, PlayerAction.LEFT, false));
        actionMap.put(InputKey.RELEASED_RIGHT, new MoveAction(actions, PlayerAction.RIGHT, false));
        
        Dimension size = getPreferredSize();
        Point center = new Point((size.width - 35) / 2, (size.height - 35) / 2);
        
        playerEntity = new PlayerEntity(Color.BLUE, center);
        monsterEntity = new MonsterEntity(Color.RED, new Point(size.width - 15, size.height - 15));
    }

    @Override
    public void addNotify() {
        super.addNotify();
        if (timer != null) {
            timer.stop();
        }
        timer = new Timer(5, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                performTick();
            }
        });
        timer.start();
    }

    @Override
    public void removeNotify() {
        super.removeNotify();
        if (timer != null) {
            timer.stop();
        }
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(400, 400);
    }
    
    protected void performTick() {
        playerEntity.update(actions, getSize());
        monsterEntity.moveTowards(playerEntity.getCenter());
        repaint();
    }
    
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g.create();
        playerEntity.paint(g2d);
        monsterEntity.paint(g2d);
        g2d.dispose();
    }        
}

移動（或輸入）是通過鍵綁定 API 控制的，這會觸發一個MoveAction ，它會更新集中式 state 存儲庫（然后傳遞給PlayerEntity ，以便它相應地應用 state）。

為簡單起見，我只使用了一個Action ，但你可以做一對，一個代表“按下/激活”或“釋放/停用”

public class MoveAction extends AbstractAction {
    
    private Set<PlayerAction> actions;
    private PlayerAction action;
    private boolean activate;

    public MoveAction(Set<PlayerAction> directions, PlayerAction direction, boolean activate) {
        this.actions = directions;
        this.action = direction;
        this.activate = activate;
    }
    
    @Override
    public void actionPerformed(ActionEvent e) {
        if (activate) {
            actions.add(action);
        } else {
            actions.remove(action);
        }
    }
    
}

有關操作的更多詳細信息，請參閱如何使用操作。

但為什么要遵循這個工作流程？！

它解耦和分散了許多工作流程。 事實上，如果你真的想要，你也可以將Timer和“paint”工作流分離出來以分離類，進一步解耦類。
鍵綁定解決了與KeyListener怪異相關的所有問題。 它還分離了輸入 - 想要添加觸摸控件/按鈕，不用擔心，它是通過Action s 完成的。 想要添加操縱桿/控制器，不用擔心，這是通過Action s 完成的。

想要更多的怪物？

改變：

private MonsterEntity monsterEntity;

到：

private List<MonsterEntity> monsterEntitys = new ArrayList<>(32);

改變：

monsterEntity = new MonsterEntity(Color.RED, new Point(size.width - 15, size.height - 15));

到：

monsterEntitys.add(new MonsterEntity(Color.RED, new Point(size.width - 15, size.height - 15)));
monsterEntitys.add(new MonsterEntity(Color.RED, new Point(0, 0)));
monsterEntitys.add(new MonsterEntity(Color.RED, new Point(size.width - 15, 0)));
monsterEntitys.add(new MonsterEntity(Color.RED, new Point(0, size.height - 15)));

改變：

monsterEntity.paint(g2d);

到：

for (MonsterEntity entity : monsterEntitys) {
    entity.paint(g2d);
}

現在你有更多的怪物！ 玩得開心！

可運行的例子...

import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.HashSet;
import java.util.Set;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.Timer;

public class Main {
    public static void main(String[] args) {
        new Main();
    }

    public Main() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.add(new MainPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public enum PlayerAction {
        UP, DOWN, LEFT, RIGHT;
    }

    public class MainPane extends JPanel {

        private enum InputKey {
            PRESSED_UP, PRESSED_DOWN, PRESSED_LEFT, PRESSED_RIGHT,
            RELEASED_UP, RELEASED_DOWN, RELEASED_LEFT, RELEASED_RIGHT;

            public KeyStroke getKeyStroke() {
                switch (this) {
                    case PRESSED_UP: return KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false);
                    case PRESSED_DOWN: return KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, false);
                    case PRESSED_LEFT: return KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, false);
                    case PRESSED_RIGHT: return KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, false);
                    case RELEASED_UP: return KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, true);
                    case RELEASED_DOWN: return KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, true);
                    case RELEASED_LEFT: return KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, true);
                    case RELEASED_RIGHT: return KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, true);
                }
                return null;
            }
        }

        private PlayerEntity playerEntity;
        private MonsterEntity monsterEntity;
        private Timer timer;

        private Set<PlayerAction> actions = new HashSet<PlayerAction>();

        public MainPane() {
            InputMap inputMap = getInputMap(WHEN_IN_FOCUSED_WINDOW);
            ActionMap actionMap = getActionMap();

            inputMap.put(InputKey.PRESSED_UP.getKeyStroke(), InputKey.PRESSED_UP);
            inputMap.put(InputKey.PRESSED_DOWN.getKeyStroke(), InputKey.PRESSED_DOWN);
            inputMap.put(InputKey.PRESSED_LEFT.getKeyStroke(), InputKey.PRESSED_LEFT);
            inputMap.put(InputKey.PRESSED_RIGHT.getKeyStroke(), InputKey.PRESSED_RIGHT);
            inputMap.put(InputKey.RELEASED_UP.getKeyStroke(), InputKey.RELEASED_UP);
            inputMap.put(InputKey.RELEASED_DOWN.getKeyStroke(), InputKey.RELEASED_DOWN);
            inputMap.put(InputKey.RELEASED_LEFT.getKeyStroke(), InputKey.RELEASED_LEFT);
            inputMap.put(InputKey.RELEASED_RIGHT.getKeyStroke(), InputKey.RELEASED_RIGHT);

            actionMap.put(InputKey.PRESSED_UP, new MoveAction(actions, PlayerAction.UP, true));
            actionMap.put(InputKey.PRESSED_DOWN, new MoveAction(actions, PlayerAction.DOWN, true));
            actionMap.put(InputKey.PRESSED_LEFT, new MoveAction(actions, PlayerAction.LEFT, true));
            actionMap.put(InputKey.PRESSED_RIGHT, new MoveAction(actions, PlayerAction.RIGHT, true));
            actionMap.put(InputKey.RELEASED_UP, new MoveAction(actions, PlayerAction.UP, false));
            actionMap.put(InputKey.RELEASED_DOWN, new MoveAction(actions, PlayerAction.DOWN, false));
            actionMap.put(InputKey.RELEASED_LEFT, new MoveAction(actions, PlayerAction.LEFT, false));
            actionMap.put(InputKey.RELEASED_RIGHT, new MoveAction(actions, PlayerAction.RIGHT, false));

            Dimension size = getPreferredSize();
            Point center = new Point((size.width - 35) / 2, (size.height - 35) / 2);

            playerEntity = new PlayerEntity(Color.BLUE, center);
            monsterEntity = new MonsterEntity(Color.RED, new Point(size.width - 15, size.height - 15));
        }

        @Override
        public void addNotify() {
            super.addNotify();
            if (timer != null) {
                timer.stop();
            }
            timer = new Timer(5, new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    performTick();
                }
            });
            timer.start();
        }

        @Override
        public void removeNotify() {
            super.removeNotify();
            if (timer != null) {
                timer.stop();
            }
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(400, 400);
        }

        protected void performTick() {
            playerEntity.update(actions, getSize());
            monsterEntity.moveTowards(playerEntity.getCenter());
            repaint();
        }

        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2d = (Graphics2D) g.create();
            playerEntity.paint(g2d);
            monsterEntity.paint(g2d);
            g2d.dispose();
        }        
    }

    public class MoveAction extends AbstractAction {

        private Set<PlayerAction> actions;
        private PlayerAction action;
        private boolean activate;

        public MoveAction(Set<PlayerAction> directions, PlayerAction direction, boolean activate) {
            this.actions = directions;
            this.action = direction;
            this.activate = activate;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            if (activate) {
                actions.add(action);
            } else {
                actions.remove(action);
            }
        }

    }

    public interface Entity {
        public void paint(Graphics2D g2d);
    }

    public static class MonsterEntity implements Entity {
        protected static final int DELTA = 1;

        private Rectangle bounds = new Rectangle(0, 0, 15, 15);
        private Color fillColor;

        public MonsterEntity(Color fillColor, Point location) {
            this.fillColor = fillColor;
            this.bounds.setLocation(location);
        }

        public Color getFillColor() {
            return fillColor;
        }

        public Rectangle getBounds() {
            return bounds;
        }

        public Point getCenter() {
            return new Point((int)getBounds().getCenterX(), (int)getBounds().getCenterY());
        }

        public void moveTowards(Point target) {
            Rectangle bounds = getBounds();
            Point center = getCenter();
            int xDelta = target.x < center.x ? -DELTA : DELTA;
            int yDelta = target.y < center.y ? -DELTA : DELTA;

            getBounds().setLocation(bounds.x + xDelta, bounds.y + yDelta);
        }

        @Override
        public void paint(Graphics2D g2d) {
            g2d.setColor(getFillColor());
            g2d.fill(getBounds());
        }
    }

    public static class PlayerEntity implements Entity {

       protected static final int DELTA = 2;

        private Rectangle bounds = new Rectangle(0, 0, 35, 35);
        private Color fillColor;

        public PlayerEntity(Color fillColor, Point location) {
            this.fillColor = fillColor;
            this.bounds.setLocation(location);
        }

        public Color getFillColor() {
            return fillColor;
        }

        public Rectangle getBounds() {
            return bounds;
        }

        public Point getCenter() {
            return new Point((int)getBounds().getCenterX(), (int)getBounds().getCenterY());
        }

        public void update(Set<PlayerAction> actions, Dimension size) {
            Rectangle currentBounds = getBounds();
            int x = currentBounds.x;
            int y = currentBounds.y;

            if (actions.contains(PlayerAction.UP)) {
                y -= DELTA;
            }
            if (actions.contains(PlayerAction.DOWN)) {
                y += DELTA;
            }
            if (actions.contains(PlayerAction.LEFT)) {
                x -= DELTA;
            }
            if (actions.contains(PlayerAction.RIGHT)) {
                x += DELTA;
            }

            if (y < 0) {
                y = 0;
            }
            if (y + currentBounds.height > size.height) {
                y = size.height - currentBounds.height;
            }
            if (x < 0) {
                x = 0;
            }
            if (x + currentBounds.width > size.width) {
                x = size.width - currentBounds.width;
            }

            getBounds().setLocation(x, y);
        }

        @Override
        public void paint(Graphics2D g2d) {
            g2d.setColor(getFillColor());
            g2d.fill(getBounds());
        }

    }
}

其他考慮...

現在速度/增量實際上非常高。 我會考慮使用Shape API，使用Point2D和Rectangle2D之類的東西，它們提供基於double的屬性而不是int ，這會減少增量值並減慢實體的速度。

有關更多詳細信息，請參閱使用幾何

在Java中移動兩個對象在同一個class上一個JFrame

問題描述

1 個解決方案

解決方案1
1 已采納 2022-11-22 23:10:25

但為什么要遵循這個工作流程？！

可運行的例子...

其他考慮...

在Java中移動兩個對象在同一個class上一個JFrame

問題描述

1 個解決方案

解決方案1 1 已采納 2022-11-22 23:10:25

但為什么要遵循這個工作流程？！

可運行的例子...

其他考慮...

解決方案1
1 已采納 2022-11-22 23:10:25