【0基础学java】教学日志：项目实战-坦克大战-3
2024-04-10 04:25:34
本章概述：本章主要讲了
1、定义坦克方向的enum，根据按键状态确定坦克方向，根据坦克方向确定坦克位移。
2、抽象出坦克类，封装相应的属性和方法，在tankFrame中直接调用。
3、添加坦克静止的处理，只要四个键都没有按下去，坦克就是静止的。
4、定义子弹类，设定属性和方法，new出一颗新的子弹，在屏幕上画出来。
5、按下space键，tank会火出一颗子弹，必须持有tankFrame的引用，把子弹传递给窗口，画出来
目录
本章概述：
一、定义坦克方向的enum，根据按键状态确定坦克方向，根据坦克方向确定坦克位移
1、TankFrame
2、Dir
二、抽象出坦克类，封装相应的属性和方法，在tankFrame中直接调用
1、TankFrame
2、Tank
三、添加坦克静止的处理，只要四个键都没有按下去，坦克就是静止的
1、TankFrame
2、Tank
四、定义子弹类，设定属性和方法，new出一颗新的子弹，在屏幕上画出来
1、TankFrame
2、Tank
3、Bullet
五、按下space键，tank会火出一颗子弹，必须持有tankFrame的引用，把子弹传递给窗口，画出来
1、TankFrame
2、Tank
运行效果
本章概述：
一、定义坦克方向的enum，根据按键状态确定坦克方向，根据坦克方向确定坦克位移
1、TankFrame
package com.tencent.tank;import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;/*** @author YuPanpan* @version 1.0*/
public class TankFrame extends Frame {int x = 200,y=200;Dir dir = Dir.DOWN;static final int SPEED = 10;public TankFrame(){
@ -33,10 +35,25 @@ public class TankFrame extends Frame {@Overridepublic void paint(Graphics g) {
// System.out.println("paint");g.fillRect(x,y,50,50);
// x += 10;
// y += 50;switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}class MyListener extends KeyAdapter{
@ -47,7 +64,6 @@ public class TankFrame extends Frame {boolean bD = false;@Overridepublic void keyPressed(KeyEvent e) {
// System.out.println("pressed");int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:
@ -65,11 +81,40 @@ public class TankFrame extends Frame {default:break;}setMainTankDir();}@Overridepublic void keyReleased(KeyEvent e) {
// System.out.println("released");int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:bL = false;break;case KeyEvent.VK_UP:bU = false;break;case KeyEvent.VK_RIGHT:bR = false;break;case KeyEvent.VK_DOWN:bD = false;break;default:break;}setMainTankDir();}private void setMainTankDir() {if(bL) dir = Dir.LEFT;if(bU) dir = Dir.UP;if(bR) dir = Dir.RIGHT;if(bD) dir = Dir.DOWN;}}}2、Dir
public enum Dir {LEFT,UP,RIGHT,DOWN
}二、抽象出坦克类，封装相应的属性和方法，在tankFrame中直接调用
1、TankFrame
package com.tencent.tank;import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;/*** @author YuPanpan* @version 1.0*/
public class TankFrame extends Frame {int x = 200,y=200;Dir dir = Dir.DOWN;static final int SPEED = 10;Tank myTank = new Tank(200,200,Dir.DOWN);public TankFrame(){setTitle("tank war");
@ -35,24 +32,8 @@ public class TankFrame extends Frame {@Overridepublic void paint(Graphics g) {g.fillRect(x,y,50,50);switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}myTank.paint(g);}@ -109,13 +90,13 @@}private void setMainTankDir() {if(bL) dir = Dir.LEFT;if(bU) dir = Dir.UP;if(bR) dir = Dir.RIGHT;if(bD) dir = Dir.DOWN;if(bL) myTank.setDir(Dir.LEFT);if(bU) myTank.setDir(Dir.UP);if(bR) myTank.setDir(Dir.RIGHT);if(bD) myTank.setDir(Dir.DOWN);}}}
2、Tank
package com.tencent.tank;import java.awt.*;public class Tank {private int x,y;private Dir dir;private static final int SPEED = 10;public Tank(int x,int y,Dir dir){this.x = x;this.y = y;this.dir = dir;}public Dir getDir() {return dir;}public void setDir(Dir dir) {this.dir = dir;}public void paint(Graphics g){g.fillRect(x,y,50,50);move();}public void move(){switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}}三、添加坦克静止的处理，只要四个键都没有按下去，坦克就是静止的
1、TankFrame
package com.tencent.tank;import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;/*** @author YuPanpan* @version 1.0*/
public class TankFrame extends Frame {Tank myTank = new Tank(200,200,Dir.DOWN);public TankFrame(){setTitle("tank war");setSize(800,600);setResizable(false);setVisible(true);this.addKeyListener(new MyListener());addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}@Overridepublic void paint(Graphics g) {myTank.paint(g);}class MyListener extends KeyAdapter{boolean bL = false;boolean bU = false;boolean bR = false;boolean bD = false;@Overridepublic void keyPressed(KeyEvent e) {myTank.setMoving(true);int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:
@ -68,6 +70,7 @@ public class TankFrame extends Frame {@Overridepublic void keyReleased(KeyEvent e) {int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:
@ -94,9 +97,11 @@if(bU) myTank.setDir(Dir.UP);if(bR) myTank.setDir(Dir.RIGHT);if(bD) myTank.setDir(Dir.DOWN);if(!bL && !bU && !bR && !bD) myTank.setMoving(false);}}}
2、Tank
package com.tencent.tank;import java.awt.*;public class Tank {private int x,y;private Dir dir;private static final int SPEED = 10;private boolean moving = false;public Tank(int x,int y,Dir dir){this.x = x;this.y = y;this.dir = dir;}public boolean isMoving() {return moving;}public void setMoving(boolean moving) {this.moving = moving;}public Dir getDir() {return dir;}
@ -29,24 +39,26 @@}public void move(){if(!moving) return;switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}}
四、定义子弹类，设定属性和方法，new出一颗新的子弹，在屏幕上画出来
1、TankFrame
package com.tencent.tank;import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;/*** @author YuPanpan* @version 1.0*/
public class TankFrame extends Frame {Tank myTank = new Tank(200,200,Dir.DOWN);Bullet b = new Bullet(300,300,Dir.DOWN);public TankFrame(){setTitle("tank war");
@ -20,7 +21,7 @@ public class TankFrame extends Frame {setResizable(false);setVisible(true);this.addKeyListener(new MyListener());this.addKeyListener(new MyKeyListener());addWindowListener(new WindowAdapter() {@Override
@ -34,10 +35,11 @@ public class TankFrame extends Frame {public void paint(Graphics g) {myTank.paint(g);b.paint(g);}class MyListener extends KeyAdapter{class MyKeyListener extends KeyAdapter{boolean bL = false;boolean bU = false;
@ -45,8 +47,6 @@ public class TankFrame extends Frame {boolean bD = false;@Overridepublic void keyPressed(KeyEvent e) {myTank.setMoving(true);int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:
@ -93,14 +93,20 @@ public class TankFrame extends Frame {}private void setMainTankDir() {if(bL) myTank.setDir(Dir.LEFT);if(bU) myTank.setDir(Dir.UP);if(bR) myTank.setDir(Dir.RIGHT);if(bD) myTank.setDir(Dir.DOWN);if(!bL && !bU && !bR && !bD) myTank.setMoving(false);else {myTank.setMoving(true);if (bL) myTank.setDir(Dir.LEFT);if (bU) myTank.setDir(Dir.UP);if (bR) myTank.setDir(Dir.RIGHT);if (bD) myTank.setDir(Dir.DOWN);}}}}2、Tank
package com.tencent.tank;import java.awt.*;public class Tank {private int x,y;private Dir dir;private static final int SPEED = 10;private static final int SPEED = 5;private boolean moving = false;public Tank(int x,int y,Dir dir){this.x = x;this.y = y;this.dir = dir;}public boolean isMoving() {return moving;}public void setMoving(boolean moving) {this.moving = moving;}public Dir getDir() {return dir;}public void setDir(Dir dir) {this.dir = dir;}public void paint(Graphics g){g.fillRect(x,y,50,50);move();}public void move(){if(!moving) return;switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}}3、Bullet
package com.tencent.tank;import java.awt.*;public class Bullet {private int x,y;private static final int SPEED = 1;private Dir dir;static final int WIDTH = 30,HEIGHT = 30;public Bullet(int x,int y,Dir dir){this.x = x;this.y = y;this.dir = dir;}public void paint(Graphics g){Color c = g.getColor();g.setColor(Color.RED);g.fillOval(x,y,WIDTH,HEIGHT);g.setColor(c);move();}public void move(){switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}五、按下space键，tank会火出一颗子弹，必须持有tankFrame的引用，把子弹传递给窗口，画出来
1、TankFrame
package com.tencent.tank;import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;/*** @author YuPanpan* @version 1.0*/
public class TankFrame extends Frame {Tank myTank = new Tank(200,200,Dir.DOWN);Tank myTank = new Tank(200,200,Dir.DOWN,this);Bullet b = new Bullet(300,300,Dir.DOWN);static final int GAME_WIDTH = 800,GAME_HEIGHT = 600;public TankFrame(){setTitle("tank war");setSize(GAME_WIDTH,GAME_HEIGHT);setResizable(false);setVisible(true);this.addKeyListener(new MyKeyListener());addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}Image offScreenImage = null;@Overridepublic 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);}@Overridepublic void paint(Graphics g) {myTank.paint(g);b.paint(g);}class MyKeyListener extends KeyAdapter{boolean bL = false;boolean bU = false;boolean bR = false;boolean bD = false;@Overridepublic void keyPressed(KeyEvent e) {int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:bL = true;break;case KeyEvent.VK_UP:bU = true;break;case KeyEvent.VK_RIGHT:bR = true;break;case KeyEvent.VK_DOWN:bD = true;break;case KeyEvent.VK_SPACE:myTank.fire();break;default:break;}setMainTankDir();}@Overridepublic void keyReleased(KeyEvent e) {int key = e.getKeyCode();switch(key){case KeyEvent.VK_LEFT:bL = false;break;case KeyEvent.VK_UP:bU = false;break;case KeyEvent.VK_RIGHT:bR = false;break;case KeyEvent.VK_DOWN:bD = false;break;default:break;}setMainTankDir();}private void setMainTankDir() {if(!bL && !bU && !bR && !bD) myTank.setMoving(false);else {myTank.setMoving(true);if (bL) myTank.setDir(Dir.LEFT);if (bU) myTank.setDir(Dir.UP);if (bR) myTank.setDir(Dir.RIGHT);if (bD) myTank.setDir(Dir.DOWN);}}}}2、Tank
package com.tencent.tank;import java.awt.*;public class Tank {private int x,y;private Dir dir;private static final int SPEED = 5;private boolean moving = false;public Tank(int x,int y,Dir dir){TankFrame tf = null;public Tank(int x,int y,Dir dir,TankFrame tf){this.x = x;this.y = y;this.dir = dir;this.tf = tf;}public boolean isMoving() {return moving;}public void setMoving(boolean moving) {this.moving = moving;}public Dir getDir() {return dir;}public void setDir(Dir dir) {this.dir = dir;}public void paint(Graphics g){Color c = g.getColor();g.setColor(Color.BLUE);g.fillRect(x,y,50,50);g.setColor(c);move();}public void move(){if(!moving) return;switch(dir){case LEFT:x -= SPEED;break;case UP:y -= SPEED;break;case RIGHT:x += SPEED;break;case DOWN:y += SPEED;break;default:break;}}public void fire() {tf.b = new Bullet(this.x,this.y,this.dir);}
}运行效果
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