자바 awt 연습

package shooting;

import java.awt.Canvas;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.util.ArrayList;

import java.util.Random;

public class GameBoard extends Canvas implements Runnable{

private UserFighter userfighter;

private ArrayList enemies;

private ArrayList missiles;

private StatusBar status;

private Image bg;

  private int key;

private Random rand = new Random();

private int timerToEnemyAppear; 

private int timerToFire; 

public GameBoard() // 게임보드 이미지와 객체생성

{

Toolkit tk = Toolkit.getDefaultToolkit();

bg = tk.getImage("res/22.jpg");

userfighter = new UserFighter();

status = new StatusBar();

//익명 클래스

addKeyListener(new KeyAdapter(){  //키아답터는 키이벤트 빈함수를 이미 포함하고있음 

public void keyPressed(KeyEvent e) 

{

int key=e.getKeyCode(); //코드값 정수형으로 반환 저장

switch(key)

{

case KeyEvent.VK_LEFT:

case KeyEvent.VK_RIGHT:

case KeyEvent.VK_UP:

case KeyEvent.VK_DOWN:

case KeyEvent.VK_SPACE:

GameBoard.this.key = key;

break;

}

}

@Override

public void keyReleased(KeyEvent e) {

super.keyReleased(e);

int key=e.getKeyCode(); 

switch(key)

{

case KeyEvent.VK_LEFT:

if(GameBoard.this.key== KeyEvent.VK_LEFT)

GameBoard.this.key = 0;

break;

case KeyEvent.VK_RIGHT:

if(GameBoard.this.key== KeyEvent.VK_RIGHT)

GameBoard.this.key = 0;

break;

case KeyEvent.VK_UP:

if(GameBoard.this.key== KeyEvent.VK_UP)

GameBoard.this.key = 0;

break;

case KeyEvent.VK_DOWN:

if(GameBoard.this.key== KeyEvent.VK_DOWN)

GameBoard.this.key = 0;

break;

case KeyEvent.VK_SPACE:

if(GameBoard.this.key== KeyEvent.VK_SPACE)

GameBoard.this.key = 0;

break;

}

}

});

enemies = new ArrayList();

missiles = new ArrayList();

new Thread(this).start();  //별도 변수명 저장안하고 실행

}

public void run()

{

while(true)

{

updateItems();

repaint();

try {

Thread.sleep(17);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

private void updateItems() 

{

if(key != 0 )

userfighter.move(key);

for(int i=0; i<enemies.size(); i++)  // 적기 이동

((EnemyFighter)enemies.get(i)).move();

if(timerToEnemyAppear-- == 0) //적기출현 빈도수 설정

{

enemies.add(new EnemyFighter(this));

timerToEnemyAppear = (rand.nextInt(500))+500/17;

} 

//파이터 미사일 발싸

UserMissile um = userfighter.fire();

     

    if(timerToFire>0)

timerToFire--;

if(key == KeyEvent.VK_SPACE)  // 스페이스키 눌렀을때 미사일을 일정간격으로 발싸@@

{

if(timerToFire == 0)

{

missiles.add(um);

timerToFire =7;

}

}

for(int i=0; i<missiles.size(); i++)  // 각 미사일 무브

((UserMissile)missiles.get(i)).move();

}

public void update(Graphics g) {

paint(g);

}

public void paint(Graphics g) 

{

Image buf = createImage(this.getWidth(), this.getHeight());

Graphics g1 = buf.getGraphics();

g1.drawImage(bg, 0, 0, this); //배경그리기 , 더블버퍼링

userfighter.paint(g1, this);

for(int i=0; i<enemies.size(); i++) // 적기 그리기

((EnemyFighter)enemies.get(i)).paint(g1);

for(int i=0; i<missiles.size(); i++) //미사일 그리기

((UserMissile)missiles.get(i)).paint(g1);

g.drawImage(buf, 0, 0, this);

}

}