http://slick.ninjacave.com

public void init(GameContainer container) throws SlickException {
	this.container = container;
	//初始化场景管理器
	manager = new SceneManager();
	
	//配音效
	music = new Music("res/music.ogg");
	battle_music = new Music("res/battle.ogg");
	music.play();
	
	//启动界面
	startup = new StartUp();
	
	World.TIMER.start();
}

@Override
    public void update(GameContainer container, int delta) throws SlickException {
    	
    	container.setTargetFrameRate(20);
    	input();
    	
    	if (game_state == 0) {
    		manager.randomMoveCharacter();
    		
		}
    	
    	//战斗状态
    	if (game_state == 1) {
    		
    		battle.update();
    		game_state = 0;
    		//System.out.println(battle.attackRest());
    		//System.out.println(battle.offenseRest());
    		
    		switch (battle.checkEnd()) {
			case 0://还在打
				game_state = 1;
				System.out.println("both alive");
				break;
			case 1://防守方
				System.out.println("offense died");
				//城池被攻占
				manager.setAreaOwner(manager.getCX(), manager.getCY(), battle.attacker);
				game_state = 0;
				manager.main_game_character.battle_mod = 0;
				break;
			case 2://进攻方
				System.out.println("attack died");
				game_state = 0;
				manager.main_game_character.battle_mod = 0;
				break;
			case 3://平手
				System.out.println("both died");
				game_state = 0;
				manager.main_game_character.battle_mod = 0;
				break;
			default:
				break;
			}
    		if (game_state == 0) {
    			battle_music.stop();
        		music.play();
			}
		}
    	
    	//主角移动
		manager.moveMainCharacter(step_len);
		
		//检查城池归属
		manager.check(manager.main_game_character);
		for (MainCharacter mc : manager.leader) {
			manager.check(mc);
		}
		
  		//计时器，主将的金钱以每秒50的数量递增
  		World.TIMER.end();
  		if (World.TIMER.getTime() > 1000) {
  			manager.main_game_character.addMoney(50);
  			World.TIMER.start();
		}
  		
  		if (manager.main_game_character.battle_mod != 0 && game_state == 0) {
  			music.stop();
    		battle_music.play();
  			game_state = 1;
			battle = new Battle(manager.main_game_character.battle_mod);
			battle.init(manager.main_game_character, manager.getCurrentArea().owner, 1, 500, manager.getCX(), manager.getCY());
		}
    }

public void render(GameContainer container, Graphics graphics) throws SlickException 
{
	glClear(GL_COLOR_BUFFER_BIT);
   	
   	//开启游戏状态
   	if (game_state == 2) {
   		startup.play();
	}
	else {
		//再画角色
		manager.draw();
		
		if (game_state == 1) {
			battle.draw();
		}
		
		graphics.drawString("This is me", manager.main_game_character.getX(), manager.main_game_character.getY() - 15);
		
		//显示金钱剩余值和兵力剩余值
		graphics.drawString("" + manager.main_game_character.getMoney(), 40, 45);
		graphics.drawString("" + manager.main_game_character.getNum_of_soldiers(), 620, 45);
	}
}

	if (Mouse.isButtonDown(0)) {
		//mouseEnabled = true;
		int mousex = Mouse.getX();
		int mousey = World.SCREEN_HEIGHT - Mouse.getY() - 1;

		...
	}

	public class CharacterManager {

		protected int width = World.SCREEN_WIDTH, height = World.SCREEN_HEIGHT;
		
		//主角
		protected MainCharacter main_game_character = new MainCharacter(CharacterType.LU, 0, 0, 300, 300);
		
		//另外三个主将
		public MainCharacter[] leader = {
			new MainCharacter(CharacterType.SONG, 1, 1, World.SCREEN_WIDTH / 2, World.SCREEN_HEIGHT / 2),
			new MainCharacter(CharacterType.HU, 2, 0, World.SCREEN_WIDTH / 2, World.SCREEN_HEIGHT / 2),
			new MainCharacter(CharacterType.LIN, 0, 1, World.SCREEN_WIDTH / 2, World.SCREEN_HEIGHT / 2),
		};
		
		//角色列表
		protected List<GameCharacter> character_list = new ArrayList<GameCharacter>();

public class Battle {

	//战斗模式
	private int battle_mod = 0;
	
	int i, j;
	//进攻方，防守方
	public MainCharacter attacker, offenser;
	
	//进攻队列，防守队列
	public List<GameCharacter> attack_list = new ArrayList<GameCharacter>(), offense_list = new ArrayList<GameCharacter>();
		
	private Timer timer = new Timer();
	
	//战斗动画效果
	private Animation animation = new Animation();
	Image[] images = new Image[4];
	
	...

public void draw() {
	
	switch (isMoving) {
	case UP:case DOWN:
		animation.draw(x, y);//运动状态，则动画
		break;
	
	case LEFT:
		setLeft();
		animation.draw(x, y);//运动状态，则动画
		break;
	case RIGHT:
		setRight();
		animation.draw(x, y);//运动状态，则动画
		break;
	case STOP:
		image.draw(x, y);//停止状态，则画图
		break;
	case DIED:
		setDead();
		image.draw(x, y);
		break;
	case DISAPPEAR:
		break;
	}
	
}

//在仍在行走的过程中，将人物置为死亡状态
	public void setDead() {
		if (faceDir == MoveState.LEFT) {
			//moveRight(20);
			image = type.left_dead[0];
		}
		else {
			//moveLeft(20);
			image = type.right_dead[0];
		}	
		
		if (angle <= 180) {
			if (faceDir == MoveState.LEFT)
				x = round_x + radius - radius * (float)Math.cos(angle);
			else 
				x = round_x - radius + radius * (float)Math.cos(angle);
			
			y = round_y - radius * (float)Math.sin(angle) - image.getHeight();
			angle += 15;
			//开启计时器
			timer.start();
		}
		else {
			timer.end();
			if (timer.getTime() >= 5000) {
				setMoveState(MoveState.DISAPPEAR);
			}
		}
	}
	
	//重置飞行角度为0,并设定飞行半径
	public void resetAngle(int radius) {
		angle = 0;
		round_x = x;
		round_y = y;
		this.radius = radius;
	}

public class MyButton {

	/**按钮的位置和宽高*/ 
	protected int posX, posY, width, height;
	protected Image[] current = new Image[3];
	protected String key;
	
	protected boolean isClicked = false;
	
	public MyButton(int posX, int posY, String key) {
		this.posX = posX;
		this.posY = posY;
		this.key = key;
		
		try {
			current[1] = new Image("res/" + key + ".png");
			current[2] = new Image("res/" + key + "_lux.png");
			current[0] = current[1];
		} catch (SlickException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		
		this.width = current[0].getWidth();
		this.height = current[0].getHeight();
	}
	
	//draw the button
	public void draw() {
		current[0].draw(posX, posY);
	}
	
	public int onClicked() {
		return 0;
	}
	
}

private static class ChooseButton extends MyButton {
	
	private int cur = 0;
	
	public ChooseButton(int posX, int posY, String key) {
		super(posX, posY, key);
		// TODO Auto-generated constructor stub
	}
	
	@Override
	public int onClicked() {
		
		//松开=没被按下+上一时刻刚好被按下
		if (Mouse.isButtonDown(0)) {
  			int mousex = Mouse.getX();
  			int mousey = World.SCREEN_HEIGHT - Mouse.getY() - 1;
  			
  			if (mousex >= posX && mousex <= posX + width && mousey >= posY && mousey <= posY + height) {
				current[0] = current[2];
				
				if (key.equals("ch1")) {
					cur = 1;
				} else if (key.equals("ch2")) {
					cur = 2;
				} else if (key.equals("ch3")) {
					cur = 3;
				} else if (key.equals("ch4")) {
					cur = 4;
				}
				
			}
  			else {
				current[0] = current[1];
			}
  		}
		else {
			current[0] = current[1];
			return cur;
		}
		
		return 0;
	}
	
}

try {
	left_images[0] = new Image(left);
	left_images[1] = new Image(left);
	left_images[1].rotate(10);//逆时针为正，顺时针为负
	
	left_dead[0] = new Image(left);			
	left_dead[0].rotate(90);
	
	right_images[0] = new Image(right);
	right_images[1] = new Image(right);
	right_images[1].rotate(-10);
	right_dead[0] = new Image(right);
	right_dead[0].rotate(-90);
	
} catch (SlickException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
}
		
left_animation = new Animation(left_images, 10);
right_animation = new Animation(right_images, 10);

https://github.com/hzfGuardian/ShuiHu