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안녕하세요. 사용자가 일종의 캐릭터로 게임하는 게임을 만들려고합니다. 스폰하는 괴물을 피하면서 동전을 수집하려고합니다. 내 프로그램은 오류없이 컴파일되지만 애플릿을 실행할 때 아무 것도 나타나지 않습니다. 이것은 확장의 순서 때문에 내가 모든 것을 가지고있을 수 있지만 확실하지 않습니다. 어떤 도움이라도 대단히 감사하겠습니다 (이것은 Java 클래스에 대한 나의 소개를위한 최종 학교 프로젝트를위한 것입니다). 여기 코드입니다 나는 오랫동안 알고 있지만, 모두가 손에 질문에 관련된 : 상속의자바 게임이 표시되지 않습니다.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class Sprite extends JApplet
{
Image image;
int x, y;
boolean isVisible;
public Sprite()
{
isVisible = false;
image = null;
}
public Sprite(Image i)
{
isVisible = true;
image = i;
x = 10;
y = 10;
}
public void setImage(Image img)
{
image = img;
isVisible = true;
}
public void setLocation(int _x, int _y)
{
x = _x;
y = _y;
}
public Rectangle getDimensions()
{
return new Rectangle(x, y, image.getWidth(null), image.getHeight(null));
}
public boolean intersects(Sprite s)
{
return getDimensions().intersects(s.getDimensions());
}
public void setVisible(boolean vis)
{
isVisible = vis;
}
public void paintComponent(Graphics g)
{
if(isVisible)
{
g.drawImage(image, x, y, null);
}
}
}
class Coins extends Sprite
{
int amount;
public Coins(int amt)
{
amount = amt;
}
public int getAmount()
{
return amount;
}
public void setAmount(int amt)
{
amount = amt;
}
}
class AnimateSprite extends Sprite
{
int speed = 5;
int directionX = 1, directionY = 1;
int healthPoints = 100;
final boolean DEAD = false;
final boolean ALIVE = true;
public void moveUp()
{
y -= speed;
}
public void moveDown()
{
y += speed;
}
public void moveLeft()
{
x -= speed;
}
public void moveRight()
{
x += speed;
}
public int getHealthPoints()
{
return healthPoints;
}
public void setHealthPoints(int hp)
{
healthPoints = hp;
}
public boolean hit(int amt)
{
healthPoints -= amt;
if(healthPoints < 0)
return DEAD;
else
return ALIVE;
}
}
class Game extends AnimateSprite implements Runnable, KeyListener
{
AnimateSprite user;
AnimateSprite monster, troll;
Coins ten, twenty;
Thread thread;
Random r;
public void init()
{
r = new Random();
user = new AnimateSprite();
user.setImage(getImage(getCodeBase(), "player.gif"));
monster = new AnimateSprite();
monster.setImage(getImage(getCodeBase(), "monster.gif"));
troll = new AnimateSprite();
troll.setImage(getImage(getCodeBase(), "monster.gif"));
troll.setLocation(350, 350);
setupCoins();
setFocusable(true);
addKeyListener(this);
thread = new Thread(this);
thread.start();
}
public void setupCoins()
{
ten = new Coins(10);
twenty = new Coins(20);
ten.setLocation(400, 350);
twenty.setLocation(450, 50);
ten.setImage(getImage(getCodeBase(), "coins.gif"));
twenty.setImage(getImage(getCodeBase(), "coins.gif"));
}
public void keyPressed(KeyEvent ke) //Event handling
{
int key = ke.getKeyCode();
if(key == KeyEvent.VK_UP)
user.moveUp();
else if(key == KeyEvent.VK_DOWN)
user.moveDown();
else if(key == KeyEvent.VK_LEFT)
user.moveLeft();
else if(key == KeyEvent.VK_RIGHT)
user.moveRight();
}
public void keyReleased(KeyEvent ke) {}
public void keyTyped(KeyEvent ke) {}
public void update(Graphics g) {paint(g);}
public void paint(Graphics g)
{
g.clearRect(0, 0, this.getWidth(), this.getHeight());
ten.paintComponent(g);
twenty.paintComponent(g);
monster.setLocation(r.nextInt(10) - 5 + monster.x, r.nextInt(10 - 5 + monster.y));
monster.paintComponent(g);
user.paintComponent(g);
if(user.intersects(monster))
{
g.setFont(new Font("Serif", Font.BOLD, 26));
g.drawString("YOU HAVE DIED, YOU LOSE!", 20, 100); //Prints this when you lose
thread.interrupt(); //Stopping the thread if you die
}
}
public void run()
{
try //Try catch
{
while(true) //Only does this while when the boolean is true
{
repaint();
Thread.sleep(10); //Thread sleeps
}
} catch(Exception e) {} //Exception handling
}
}
'public void paintComponent (Graphics g)'를'@Override public void paintComponent (Graphics g)'로 변경하고 다시보고하십시오. –