将思维转化为代码
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.ArrayList;
public class TankClient extends Frame {
public static final int GAME_WIDTH = 800;
public static final int GAME_HEIGHT = 600;
Tank myTank = new Tank(50, 50, this);
List missiles = new ArrayList();
Image offScreenImage = null;
public void paint(Graphics g) {
g.drawString("missiles count:" + missiles.size(), 50, 50);
for(int i=0;i
import java.awt.*;
import java.awt.event.*;
public class Tank {
public static final int XSPEED = 5;
public static final int YSPEED = 5;
public static final int WIDTH = 30;
public static final int HEIGHT = 30;
TankClient tc = null;
private int x, y;
private boolean bL=false, bU=false, bR=false, bD = false;
enum Direction {L, LU, U, RU, R, RD, D, LD, STOP};
private Direction dir = Direction.STOP;
private Direction ptDir = Direction.D;
public Tank(int x, int y) {
this.x = x;
this.y = y;
}
public Tank(int x, int y, TankClient tc) {
this(x, y);
this.tc = tc;
}
public void draw(Graphics g) {
Color c = g.getColor();
g.setColor(Color.RED);
g.fillOval(x, y, WIDTH, HEIGHT);
g.setColor(c);
switch(ptDir) {
case L:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2);
break;
case LU:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y);
break;
case U:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH/2, y);
break;
case RU:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y);
break;
case R:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y + Tank.HEIGHT/2);
break;
case RD:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y + Tank.HEIGHT);
break;
case D:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH/2, y + Tank.HEIGHT);
break;
case LD:
g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT);
break;
}
move();
}
void move() {
switch(dir) {
case L:
x -= XSPEED;
break;
case LU:
x -= XSPEED;
y -= YSPEED;
break;
case U:
y -= YSPEED;
break;
case RU:
x += XSPEED;
y -= YSPEED;
break;
case R:
x += XSPEED;
break;
case RD:
x += XSPEED;
y += YSPEED;
break;
case D:
y += YSPEED;
break;
case LD:
x -= XSPEED;
y += YSPEED;
break;
case STOP:
break;
}
if(this.dir != Direction.STOP)
ptDir = dir;
}
public 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;
}
locateDirection();
}
void locateDirection() {
if(bL && !bU && !bR && !bD) dir = Direction.L;
else if(bL && bU && !bR && !bD) dir = Direction.LU;
else if(!bL && bU && !bR && !bD) dir = Direction.U;
else if(!bL && bU && bR && !bD) dir = Direction.RU;
else if(!bL && !bU && bR && !bD) dir = Direction.R;
else if(!bL && !bU && bR && bD) dir = Direction.RD;
else if(!bL && !bU && !bR && bD) dir = Direction.D;
else if(bL && !bU && !bR && bD) dir = Direction.LD;
else if(!bL && !bU && !bR && !bD) dir = Direction.STOP;
}
public void keyReleased(KeyEvent e) {
int key = e.getKeyCode();
switch(key) {
case KeyEvent.VK_CONTROL:
fire();
break;
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;
}
locateDirection();
}
public Missile fire(){
int x = this.x + Tank.WIDTH/2 - Missile.WIDTH;
int y = this.y + Tank.HEIGHT/2 - Missile.HEIGHT;
Missile m = new Missile(x , y, ptDir, this.tc);
tc.missiles.add(m);
return m;
}
}
import java.awt.*;
public class Missile {
public static final int XSPEED = 10;
public static final int YSPEED = 10;
public static final int WIDTH = 10;
public static final int HEIGHT = 10;
int x, y;
Tank.Direction dir;
private boolean Live = true;
private TankClient tc;
public boolean isLive() {
return Live;
}
public Missile(int x, int y, Tank.Direction dir) {
this.x = x;
this.y = y;
this.dir = dir;
}
public Missile(int x, int y, Tank.Direction dir, TankClient tc) {
this(x, y, dir);
this.tc = tc;
}
public void draw(Graphics g){
Color c = g.getColor();
g.setColor(Color.BLACK);
g.fillOval(x, y, WIDTH, HEIGHT);
g.setColor(c);
move();
}
private void move(){
switch(dir) {
case L:
x -= XSPEED;
break;
case LU:
x -= XSPEED;
y -= YSPEED;
break;
case U:
y -= YSPEED;
break;
case RU:
x += XSPEED;
y -= YSPEED;
break;
case R:
x += XSPEED;
break;
case RD:
x += XSPEED;
y += YSPEED;
break;
case D:
y += YSPEED;
break;
case LD:
x -= XSPEED;
y += YSPEED;
break;
}
if(x <0 || y < 0 || x > TankClient.GAME_WIDTH || y > TankClient.GAME_HEIGHT){
Live = false;
tc.missiles.remove(this);
}
}
}