JAVA之坦克大战（二）我方坦克移动
思路：写出我方坦克的上下左右的移动方法，在MyPanel类里继承Keylistener接口，重写三个方法 在KeyPressed方法中写出上写左右四个动作对应的四个方向，和方法，然后重绘 MyPanel类：
import javafx.scene.input.KeyCode;
import javax.swing.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.*;
import java.util.Vector;public class MyPanel extends Panel implements KeyListener {MyTank myTank = null;Vector enemyTanks = new Vector();//集合类int enemynum = 12;//坦克数量MyPanel() {myTank = new MyTank(120, 220);//初始化我的坦克的初始坐标myTank.setSpeed(5);for (int i = 0; i < enemynum / 2; i++) {EnemyTank enemyTank = new EnemyTank(i * (230 + 5), 0);//给上面的enemyTank初始化坐标enemyTanks.add(enemyTank);//向集合里面添加enemyTank}for (int i = 6; i < enemynum; i++) {EnemyTank enemyTank = new EnemyTank((12 - i - 1) * (230 + 5), 930);//给下面的enemyTank初始化坐标enemyTanks.add(enemyTank);}}public void paint(Graphics g) //重写paint方法{g.setColor(Color.black);//画笔着色g.fillRect(0, 0, 1200, 1000);//面板if (myTank.life) {drawTank(myTank.getX(), myTank.getY(), myTank.getDir(), g, 0);//画我方坦克}for (int i = 0; i < enemyTanks.size(); i++) {EnemyTank enemyTank = enemyTanks.get(i);drawTank(enemyTank.getX(), enemyTank.getY(), enemyTank.getDir(), g, 1);//画敌方坦克}}public void drawTank(int x, int y, int dir, Graphics g, int type)//画坦克{//System.out.println(dir);switch (type) {case 0://我方g.setColor(Color.red);break;case 1://敌方g.setColor(Color.green);break;}switch (dir) {case 0://上g.fill3DRect(x, y, 5, 30, false);//左腿g.fill3DRect(x + 15, y, 5, 30, false);//右腿g.fill3DRect(x + 5, y + 5, 10, 20, false);//中间g.fillOval(x + 5, y + 10, 10, 10);//圆形g.drawLine(x + 10, y + 15, x + 10, y - 3);//炮管break;case 1://左g.fill3DRect(x, y, 30, 5, false);g.fill3DRect(x, y + 15, 30, 5, false);g.fill3DRect(x + 5, y + 5, 20, 10, false);g.fillOval(x + 10, y + 5, 10, 10);g.drawLine(x + 15, y + 10, x - 3, y + 10);break;case 2://下g.fill3DRect(x, y, 5, 30, false);g.fill3DRect(x + 15, y, 5, 30, false);g.fill3DRect(x + 5, y + 5, 10, 20, false);g.fillOval(x + 5, y + 10, 10, 10);g.drawLine(x + 10, y + 15, x + 10, y + 33);break;case 3://右g.fill3DRect(x, y, 30, 5, false);g.fill3DRect(x, y + 15, 30, 5, false);g.fill3DRect(x + 5, y + 5, 20, 10, false);g.fillOval(x + 10, y + 5, 10, 10);g.drawLine(x + 15, y + 10, x + 33, y + 10);break;}}public void keyReleased(KeyEvent e){};public void keyTyped(KeyEvent e){};public void keyPressed(KeyEvent e){if(e.getKeyCode()==KeyEvent.VK_W){myTank.up();myTank.setDir(0);}else if(e.getKeyCode()==KeyEvent.VK_S){myTank.down();myTank.setDir(2);}else if(e.getKeyCode()==KeyEvent.VK_A){myTank.left();myTank.setDir(1);}else if(e.getKeyCode()==KeyEvent.VK_D){myTank.right();myTank.setDir(3);}this.repaint();}
} public class MyTank extends Tank {MyTank(int x,int y){super(x,y);}public void up(){setY(getY()-getSpeed());}public void down(){setY(getY()+getSpeed());}public void left(){setX(getX()-getSpeed());}public void right(){setX(getX()+getSpeed());}
}
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