first commit

tankWar/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

tankWar/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/tankWar.iml" filepath="$PROJECT_DIR$/tankWar.iml" />
+    </modules>
+  </component>
+</project>

tankWar/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

tankWar/.idea/workspace.xml

@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="BranchesTreeState">
+    <expand>
+      <path>
+        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
+        <item name="LOCAL_ROOT" type="e8cecc67:BranchNodeDescriptor" />
+      </path>
+    </expand>
+    <select />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="3f94e015-c235-47fa-8e89-3005ea1dbca3" name="Default Changelist" comment="" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
+  </component>
+  <component name="MavenImportPreferences">
+    <option name="generalSettings">
+      <MavenGeneralSettings>
+        <option name="mavenHome" value="$PROJECT_DIR$/../../../worksoftware/apache-maven-3.6.3" />
+        <option name="userSettingsFile" value="D:\worksoftware\apache-maven-3.6.3\conf\settings.xml" />
+      </MavenGeneralSettings>
+    </option>
+  </component>
+  <component name="ProjectId" id="2FMGmTsV8KKoZs9WJhuOnwm8BeU" />
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showExcludedFiles" value="false" />
+    <option name="showLibraryContents" value="true" />
+    <option name="sortByType" value="true" />
+  </component>
+  <component name="PropertiesComponent">
+    <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
+    <property name="RunOnceActivity.ShowReadmeOnStart" value="true" />
+    <property name="WebServerToolWindowFactoryState" value="false" />
+    <property name="aspect.path.notification.shown" value="true" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/../../tank/tank" />
+    <property name="settings.editor.selected.configurable" value="MavenSettings" />
+  </component>
+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="3f94e015-c235-47fa-8e89-3005ea1dbca3" name="Default Changelist" comment="" />
+      <created>1664294698795</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1664294698795</updated>
+      <workItem from="1664294701908" duration="283000" />
+      <workItem from="1664375053218" duration="110000" />
+    </task>
+    <task id="LOCAL-00001" summary="day2，实现坦克由键盘控制移动，发出多个子弹">
+      <created>1664294827676</created>
+      <option name="number" value="00001" />
+      <option name="presentableId" value="LOCAL-00001" />
+      <option name="project" value="LOCAL" />
+      <updated>1664294827676</updated>
+    </task>
+    <option name="localTasksCounter" value="2" />
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="2" />
+  </component>
+  <component name="Vcs.Log.Tabs.Properties">
+    <option name="TAB_STATES">
+      <map>
+        <entry key="MAIN">
+          <value>
+            <State />
+          </value>
+        </entry>
+      </map>
+    </option>
+    <option name="oldMeFiltersMigrated" value="true" />
+  </component>
+  <component name="VcsManagerConfiguration">
+    <MESSAGE value="day2，实现坦克由键盘控制移动，发出多个子弹" />
+    <option name="LAST_COMMIT_MESSAGE" value="day2，实现坦克由键盘控制移动，发出多个子弹" />
+  </component>
+  <component name="WindowStateProjectService">
+    <state x="-1362" y="95" key="CommitChangelistDialog2" timestamp="1664294827026">
+      <screen x="-1920" y="0" width="1920" height="1040" />
+    </state>
+    <state x="-1362" y="95" key="CommitChangelistDialog2/0.0.1536.824/-1920.0.1920.1040@-1920.0.1920.1040" timestamp="1664294827026" />
+    <state x="-1180" y="274" key="FileChooserDialogImpl" timestamp="1664375157424">
+      <screen x="-1920" y="0" width="1920" height="1040" />
+    </state>
+    <state x="-1180" y="274" key="FileChooserDialogImpl/0.0.1536.824/-1920.0.1920.1040@-1920.0.1920.1040" timestamp="1664375157424" />
+    <state x="-1368" y="252" key="Vcs.Push.Dialog.v2" timestamp="1664294847858">
+      <screen x="-1920" y="0" width="1920" height="1040" />
+    </state>
+    <state x="-1368" y="252" key="Vcs.Push.Dialog.v2/0.0.1536.824/-1920.0.1920.1040@-1920.0.1920.1040" timestamp="1664294847858" />
+    <state x="-1166" y="432" key="com.intellij.openapi.vcs.update.UpdateOrStatusOptionsDialogupdate-v2" timestamp="1664294901929">
+      <screen x="-1920" y="0" width="1920" height="1040" />
+    </state>
+    <state x="-1166" y="432" key="com.intellij.openapi.vcs.update.UpdateOrStatusOptionsDialogupdate-v2/0.0.1536.824/-1920.0.1920.1040@-1920.0.1920.1040" timestamp="1664294901929" />
+    <state x="-1198" y="419" key="git4idea.remote.GitConfigureRemotesDialog" timestamp="1664294753576">
+      <screen x="-1920" y="0" width="1920" height="1040" />
+    </state>
+    <state x="-1198" y="419" key="git4idea.remote.GitConfigureRemotesDialog/0.0.1536.824/-1920.0.1920.1040@-1920.0.1920.1040" timestamp="1664294753576" />
+  </component>
+</project>

tankWar/src/Bullet.java

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+import java.awt.*;
+
+/**
+ * @Description: 子弹
+ * @Author: zhanxinlin
+ * @Date: 2022-09-27 23:10
+ */
+public class Bullet {
+    private static final int SPEED = 10;
+    private static final int WIDTH = 20;
+    private static final int HEIGHT = 20;
+
+    private int x;
+    private int y;
+    private FrameTank frameTank;
+    private Direction direction;
+    private boolean live = true;
+
+    public Bullet(int x, int y, Direction direction, FrameTank frameTank) {
+        this.x = x;
+        this.y = y;
+        this.direction = direction;
+        this.frameTank = frameTank;
+    }
+
+    public void paint(Graphics g) {
+        // 子弹超出界限，从子弹集合中移除
+        if (!live) {
+            frameTank.bulletList.remove(this);
+        }
+
+        Color color = g.getColor();
+        g.setColor(Color.RED);
+        g.fillOval(x, y, WIDTH, HEIGHT);
+        g.setColor(color);
+        move();
+    }
+
+    private void move() {
+        // 定义坦克的移动特征
+        switch (direction) {
+            case LEFT:
+                x -= SPEED;
+                break;
+            case UP:
+                y -= SPEED;
+                break;
+            case RIGHT:
+                x += SPEED;
+                break;
+            case DOWN:
+                y += SPEED;
+                break;
+        }
+
+        // 子弹超出临界范围
+        if (x < 0 || y < 0 || y > FrameTank.GAME_HEIGHT || x > FrameTank.GAME_WIDTH) {
+            live = false;
+        }
+    }
+}

tankWar/src/Direction.java

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+/**
+ * @Description: 方向枚举
+ * @Author: zhanxinlin
+ * @Date: 2022-09-27 22:21
+ */
+public enum Direction {
+    LEFT, UP, RIGHT, DOWN
+}

tankWar/src/FrameTank.java

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+import java.awt.*;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @Description: 坦克大战窗口
+ * @Author: zhanxinlin
+ * @Date: 2022-09-27 21:34
+ */
+public class FrameTank extends Frame{
+    static final int GAME_WIDTH = 800;
+    static final int GAME_HEIGHT = 600;
+
+    Tank myTank = new Tank(200 ,200, Direction.DOWN, this);
+    List<Bullet> bulletList = new ArrayList<>(); // 用集合来装子弹
+
+    // 构造方法
+    public FrameTank() {
+        this.setSize(GAME_WIDTH, GAME_HEIGHT);
+        this.setResizable(false); // 窗口大小不可拉伸
+        this.setVisible(true); // 窗口可见
+        this.setTitle("tank war");
+
+        // 窗口监听器，点击"×"，则关闭窗口，停止程序
+        this.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                System.exit(0);
+            }
+        });
+
+        // 键盘按钮监听器
+        this.addKeyListener(new MyKeyListener());
+    }
+
+    Image offScreenImage = null;
+
+    /**
+     * 双缓冲解决窗口闪烁
+     *
+     * @param g 画笔
+     */
+    @Override
+    public void update(Graphics g) {
+        if (offScreenImage == null) {
+            offScreenImage = this.createImage(GAME_WIDTH, GAME_HEIGHT);
+        }
+        Graphics gOffScreen = offScreenImage.getGraphics();
+        Color c = gOffScreen.getColor();
+        gOffScreen.setColor(Color.BLACK);
+        gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT);
+        gOffScreen.setColor(c);
+        paint(gOffScreen);
+        g.drawImage(offScreenImage, 0, 0, null);
+    }
+
+    /**
+     * 画图方法，系统调用
+     *
+     * @param g
+     */
+    @Override
+    public void paint(Graphics g) {
+        Color color = g.getColor();
+        g.setColor(Color.WHITE);
+        g.drawString("子弹的数量：" + bulletList.size(), 10, 60);
+        g.setColor(color);
+
+        // 坦克把自己画出来
+        myTank.paint(g);
+
+        // 子弹把自己画出来
+        for (int i = 0; i < bulletList.size(); i++) {
+            bulletList.get(i).paint(g);
+        }
+    }
+
+    class MyKeyListener extends KeyAdapter {
+        boolean leftDirection = false;
+        boolean upDirection = false;
+        boolean rightDirection = false;
+        boolean downDirection = false;
+
+        @Override
+        public void keyPressed(KeyEvent e) {
+            int key = e.getKeyCode();
+            switch (key) {
+                case KeyEvent.VK_LEFT:
+                    leftDirection = true;
+                    break;
+                case KeyEvent.VK_UP:
+                    upDirection = true;
+                    break;
+                case KeyEvent.VK_RIGHT:
+                    rightDirection = true;
+                    break;
+                case KeyEvent.VK_DOWN:
+                    downDirection = true;
+                    break;
+                case KeyEvent.VK_CONTROL:
+                    myTank.fire();
+                    break;
+                default:
+                    break;
+            }
+
+            setMainTankDirection();
+        }
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            int key = e.getKeyCode();
+            switch (key) {
+                case KeyEvent.VK_LEFT:
+                    leftDirection = false;
+                    break;
+                case KeyEvent.VK_UP:
+                    upDirection = false;
+                    break;
+                case KeyEvent.VK_RIGHT:
+                    rightDirection = false;
+                    break;
+                case KeyEvent.VK_DOWN:
+                    downDirection = false;
+                    break;
+                default:
+                    break;
+            }
+
+            setMainTankDirection();
+        }
+
+        /**
+         * 改变坦克的方向
+         */
+        private void setMainTankDirection() {
+            if (!leftDirection && !upDirection && !downDirection && !rightDirection) { // 没有按方向键，静止不动
+                myTank.setMoving(false);
+            } else { // 按了方向键
+                myTank.setMoving(true);
+
+                if (leftDirection) {
+                    myTank.setDirection(Direction.LEFT);
+                }
+                if (rightDirection) {
+                    myTank.setDirection(Direction.RIGHT);
+                }
+                if (upDirection) {
+                    myTank.setDirection(Direction.UP);
+                }
+                if (downDirection) {
+                    myTank.setDirection(Direction.DOWN);
+                }
+            }
+        }
+    }
+}

tankWar/src/Main.java

@@ -0,0 +1,15 @@
+/**
+ * @Description: 程序启动入口
+ * @Author: zhanxinlin
+ * @Date: 2022-09-27 22:00
+ */
+public class Main {
+    public static void main(String[] args) throws InterruptedException {
+        FrameTank frameTank = new FrameTank();
+
+        while (true) {
+            Thread.sleep(50);
+            frameTank.repaint(); // 重画窗口，重新调用paint方法
+        }
+    }
+}

tankWar/src/Tank.java

@@ -0,0 +1,86 @@
+import java.awt.*;
+
+/**
+ * @Description: 坦克类
+ * @Author: zhanxinlin
+ * @Date: 2022-09-27 22:49
+ */
+public class Tank {
+    private static final int SPEED = 5;
+    private int x;
+    private int y;
+    private Direction direction;
+    private boolean moving = false;
+    private FrameTank frameTank = null;
+
+    public Tank(int x, int y, Direction direction, FrameTank frameTank) {
+        this.x = x;
+        this.y = y;
+        this.direction = direction;
+        this.frameTank = frameTank;
+    }
+
+    /**
+     * tank把自己画出来
+     *
+     * @param g 画笔
+     */
+    public void paint(Graphics g) {
+        Color color = g.getColor();
+        g.setColor(Color.GREEN);
+        g.fillRect(x, y, 50, 50);
+        g.setColor(color);
+        move();
+    }
+
+    /**
+     * 坦克移动方法
+     */
+    private void move() {
+        if (!moving) {
+            return;
+        }
+
+        // 定义坦克的移动特征
+        switch (direction) {
+            case LEFT:
+                x -= SPEED;
+                break;
+            case UP:
+                y -= SPEED;
+                break;
+            case RIGHT:
+                x += SPEED;
+                break;
+            case DOWN:
+                y += SPEED;
+                break;
+        }
+    }
+
+    /**
+     * 坦克开火方法
+     * 难点：如何将坦克对象new出来的子弹对象bullet传递到FrameTank对象的子弹对象bullet中
+     * 解决：坦克对象要持有FrameTank对象的引用
+     */
+    public void fire() {
+        // 将子弹加入子弹集合
+        frameTank.bulletList.add(new Bullet(this.x, this.y, this.direction, this.frameTank));
+    }
+
+    public Direction getDirection() {
+        return direction;
+    }
+
+    public void setDirection(Direction direction) {
+        this.direction = direction;
+    }
+
+    public boolean isMoving() {
+        return moving;
+    }
+
+    public void setMoving(boolean moving) {
+        this.moving = moving;
+    }
+}

tankWar/tankWar.iml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>