-2
我剛開始在這個計算機科學任務的galaga計劃稍後回來，但今天就努力工作，基本上我已經把所有的東西都畫下來了（是的，我會添加更多的敵方船隻，但是儘管代碼很混亂（是的，我知道它不是最好的，但現在，它的工作原理）。遊戲的下一個問題是碰撞。我目前的想法是有幾個陣列，每個敵人的船隻有一個，陣列將包括x和y座標，所以如果激光他在陣列中列出了一個點，'Ship1Explosion'將變爲真（從原來的假改變），並且將繪製ship1的爆炸（我知道該怎麼做）以及將布爾值Ship1更改爲false，以便船舶不會繼續一遍又一遍地重繪。有人可以幫助我進一步進入這個Galaga遊戲嗎？
Error I'm get婷：
error: int cannot be dereferenced
int h = Ship1area.charAt(l);
如果任何人都可以請幫助我，我很樂意幫助，以建立從激光碰撞。如果我需要解釋其他任何內容，請告知我，謝謝。
代碼：
import java.awt.*;
import java.applet.*;
import java.util.Iterator;
import java.util.ArrayList;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
public class Galaga extends Applet implements KeyListener
{
public static int x1 = 500;
public static int y1 = 400;
public static int bx = x1+73;
public static int by = y1+45;
public static int bx1 = x1+73;
public static int by1 = y1+100;
public static int by2 = by-40;
public static int by3 = by-50;
public static int x = 200;
public static int y = 0;
public static int j = 262;
public static int p;
public static int h;
public static int Ship1area;
public boolean keyUp;
public boolean keyDown;
public boolean keyLeft;
public boolean keyRight;
public boolean keySpace;
public boolean Laser = false;
public boolean Ship1Explosion = false;
public boolean Ship1 = true;
public void paint(Graphics g)
{
DrawBackground(g);
addKeyListener(this);
this.DrawGalaga(g,x1,y1);
DrawShip1(g);
DrawLaser(g);
DrawShip1Explosion(g);
}
public void DrawBackground(Graphics g)
{
g.setColor(Color.black);
g.fillRect(1,2,3000,4000);
DrawStars(g);
}
public void DrawGalaga(Graphics g, int x1, int y1)
{
{
g.setColor(Color.red);
g.drawLine(x1+42,y1+75,x1+42,y1+80); //Far Left Gun
g.drawLine(x1+43,y1+75,x1+43,y1+80);
g.drawLine(x1+44,y1+75,x1+44,y1+80);
g.drawLine(x1+45,y1+75,x1+45,y1+80);
g.setColor(Color.white);
g.drawLine(x1+42,y1+80,x1+42,y1+100); //Far Left Piece
g.drawLine(x1+43,y1+80,x1+43,y1+100);
g.drawLine(x1+44,y1+80,x1+44,y1+100);
g.drawLine(x1+45,y1+80,x1+45,y1+100);
g.drawLine(x1+46,y1+83,x1+46,y1+96); //From Left, 1st one
g.drawLine(x1+47,y1+83,x1+47,y1+96);
g.drawLine(x1+48,y1+83,x1+48,y1+96);
g.drawLine(x1+49,y1+83,x1+49,y1+96);
g.drawLine(x1+50,y1+79,x1+50,y1+92); //From Left, 2nd one
g.drawLine(x1+51,y1+79,x1+51,y1+92);
g.drawLine(x1+52,y1+79,x1+52,y1+92);
g.drawLine(x1+53,y1+79,x1+53,y1+92);
g.drawLine(x1+54,y1+65,x1+54,y1+89); //From Left, 3rd one
g.drawLine(x1+55,y1+65,x1+55,y1+89);
g.drawLine(x1+56,y1+65,x1+56,y1+89);
g.drawLine(x1+57,y1+65,x1+57,y1+89);
g.drawLine(x1+58,y1+75,x1+58,y1+89); //From Middle 3rd one
g.drawLine(x1+59,y1+75,x1+59,y1+89);
g.drawLine(x1+60,y1+75,x1+60,y1+89);
g.drawLine(x1+61,y1+75,x1+61,y1+89);
g.drawLine(x1+62,y1+70,x1+62,y1+85); //From Middle, 2nd Left one
g.drawLine(x1+63,y1+70,x1+63,y1+85);
g.drawLine(x1+64,y1+70,x1+64,y1+85);
g.drawLine(x1+65,y1+70,x1+65,y1+85);
g.drawLine(x1+66,y1+60,x1+66,y1+95); //From Middle, 1st Left one
g.drawLine(x1+67,y1+60,x1+67,y1+95);
g.drawLine(x1+68,y1+60,x1+68,y1+95);
g.drawLine(x1+69,y1+60,x1+69,y1+95);
g.drawLine(x1+70,y1+45,x1+70,y1+100); //Big Middle Piece
g.drawLine(x1+71,y1+45,x1+71,y1+100);
g.drawLine(x1+72,y1+45,x1+72,y1+100);
g.drawLine(bx,by,bx1,by1);
g.drawLine(x1+74,y1+45,x1+74,y1+100);
g.drawLine(x1+75,y1+45,x1+75,y1+100);
g.drawLine(x1+76,y1+45,x1+76,y1+100);
g.drawLine(x1+77,y1+60,x1+77,y1+95); //From Middle, 1st Right one
g.drawLine(x1+78,y1+60,x1+78,y1+95);
g.drawLine(x1+79,y1+60,x1+79,y1+95);
g.drawLine(x1+80,y1+60,x1+80,y1+95);
g.drawLine(x1+81,y1+70,x1+81,y1+85); //From Middle, 2nd Right one
g.drawLine(x1+82,y1+70,x1+82,y1+85);
g.drawLine(x1+83,y1+70,x1+83,y1+85);
g.drawLine(x1+84,y1+70,x1+84,y1+85);
g.drawLine(x1+85,y1+75,x1+85,y1+89); //From Middle 3rd one
g.drawLine(x1+86,y1+75,x1+86,y1+89);
g.drawLine(x1+87,y1+75,x1+87,y1+89);
g.drawLine(x1+88,y1+75,x1+88,y1+89);
g.drawLine(x1+88,y1+65,x1+88,y1+89); //From Right, 3rd one
g.drawLine(x1+89,y1+65,x1+89,y1+89);
g.drawLine(x1+90,y1+65,x1+90,y1+89);
g.drawLine(x1+91,y1+65,x1+91,y1+89);
g.drawLine(x1+92,y1+79,x1+92,y1+92); //From Right, 2nd one
g.drawLine(x1+93,y1+79,x1+93,y1+92);
g.drawLine(x1+94,y1+79,x1+94,y1+92);
g.drawLine(x1+95,y1+79,x1+95,y1+92);
g.drawLine(x1+96,y1+83,x1+96,y1+96); //From Right, 1st one
g.drawLine(x1+97,y1+83,x1+97,y1+96);
g.drawLine(x1+98,y1+83,x1+98,y1+96);
g.drawLine(x1+99,y1+83,x1+99,y1+96);
g.drawLine(x1+100,y1+80,x1+100,y1+100); //Far Right Piece
g.drawLine(x1+101,y1+80,x1+101,y1+100);
g.drawLine(x1+102,y1+80,x1+102,y1+100);
g.drawLine(x1+103,y1+80,x1+103,y1+100);
g.setColor(Color.red);
g.drawLine(x1+100,y1+75,x1+100,y1+80); //Far Right Gun
g.drawLine(x1+101,y1+75,x1+101,y1+80);
g.drawLine(x1+102,y1+75,x1+102,y1+80);
g.drawLine(x1+103,y1+75,x1+103,y1+80);
}
}
public void DrawShip1(Graphics g)
{
int x = 0;
int y = 0;
if(Ship1)
{
g.setColor(Color.blue);
Polygon Ship1 = new Polygon();
Ship1.addPoint(x+268,y+190); //1
Ship1.addPoint(x+270,y+190);
Ship1.addPoint(x+270,y+185);
Ship1.addPoint(x+275,y+185);
Ship1.addPoint(x+275,y+155); //5
Ship1.addPoint(x+278,y+155);
Ship1.addPoint(x+278,y+150);
Ship1.addPoint(x+285,y+150);
Ship1.addPoint(x+285,y+165);
Ship1.addPoint(x+293,y+165); //10
Ship1.addPoint(x+293,y+150);
Ship1.addPoint(x+301,y+150);
Ship1.addPoint(x+301,y+165);
Ship1.addPoint(x+309,y+165);
Ship1.addPoint(x+309,y+150); //15
Ship1.addPoint(x+317,y+150);
Ship1.addPoint(x+317,y+155);
Ship1.addPoint(x+319,y+155);
Ship1.addPoint(x+319,y+185);
Ship1.addPoint(x+325,y+185); //20
Ship1.addPoint(x+325,y+190);
Ship1.addPoint(x+323,y+190);
Ship1.addPoint(x+323,y+185);
Ship1.addPoint(x+330,y+185);
Ship1.addPoint(x+330,y+155); //25
Ship1.addPoint(x+325,y+155);
Ship1.addPoint(x+325,y+145);
Ship1.addPoint(x+330,y+145);
Ship1.addPoint(x+330,y+140);
Ship1.addPoint(x+316,y+140); //30
Ship1.addPoint(x+316,y+135);
Ship1.addPoint(x+311,y+135);
Ship1.addPoint(x+311,y+130);
Ship1.addPoint(x+306,y+130);
Ship1.addPoint(x+306,y+125); //35
Ship1.addPoint(x+311,y+125);
Ship1.addPoint(x+311,y+120);
Ship1.addPoint(x+316,y+120);
Ship1.addPoint(x+316,y+115);
Ship1.addPoint(x+306,y+115); //40
Ship1.addPoint(x+306,y+100);
Ship1.addPoint(x+298,y+100);
Ship1.addPoint(x+298,y+115);
Ship1.addPoint(x+290,y+115);
Ship1.addPoint(x+290,y+100); //45
Ship1.addPoint(x+282,y+100);
Ship1.addPoint(x+282,y+115);
Ship1.addPoint(x+272,y+115);
Ship1.addPoint(x+272,y+120);
Ship1.addPoint(x+277,y+120); //50
Ship1.addPoint(x+277,y+125);
Ship1.addPoint(x+282,y+125);
Ship1.addPoint(x+282,y+130);
Ship1.addPoint(x+277,y+130);
Ship1.addPoint(x+277,y+135); //55
Ship1.addPoint(x+272,y+135);
Ship1.addPoint(x+272,y+140);
Ship1.addPoint(x+262,y+140);
Ship1.addPoint(x+262,y+145);
Ship1.addPoint(x+267,y+145); //60
Ship1.addPoint(x+267,y+145);
Ship1.addPoint(x+272,y+145);
Ship1.addPoint(x+272,y+155);
Ship1.addPoint(x+265,y+155);
Ship1.addPoint(x+265,y+185); //61
Ship1.addPoint(x+268,y+185);
g.fillPolygon(Ship1);
Polygon Ship1parts1 = new Polygon();
g.setColor(Color.pink);
Ship1parts1.addPoint(x+268,y+180);
Ship1parts1.addPoint(x+272,y+180);
Ship1parts1.addPoint(x+272,y+170);
Ship1parts1.addPoint(x+270,y+170);
Ship1parts1.addPoint(x+270,y+165);
Ship1parts1.addPoint(x+268,y+165);
Ship1parts1.addPoint(x+268,y+180);
g.fillPolygon(Ship1parts1);
Polygon Ship1parts2 = new Polygon();
Ship1parts2.addPoint(x+330,y+180);
Ship1parts2.addPoint(x+324,y+180);
Ship1parts2.addPoint(x+324,y+170);
Ship1parts2.addPoint(x+326,y+170);
Ship1parts2.addPoint(x+326,y+165);
Ship1parts2.addPoint(x+328,y+165);
Ship1parts2.addPoint(x+328,y+180);
g.fillPolygon(Ship1parts2);
}
}
public void DrawStars(Graphics g)
{
g.setColor(Color.yellow);
int x, y;
for (int s = 0; s < 2000; s++)
{
x = (int)(Math.random()*2000);
y = (int)(Math.random()*2000);
g.drawLine(x, y, x, y);
}
}
public void keyPressed(KeyEvent e)
{
if(e.getKeyCode() == KeyEvent.VK_LEFT)
{
x1--;
bx--;
bx1--;
}
if(e.getKeyCode() == KeyEvent.VK_RIGHT)
{
x1++;
bx++;
bx1++;
}
if(e.getKeyCode() == KeyEvent.VK_UP)
{
y1--;
by--;
by1--;
}
if(e.getKeyCode() == KeyEvent.VK_DOWN)
{
y1++;
by++;
by1++;
}
if(e.getKeyCode() == KeyEvent.VK_SPACE)
{
Laser = true;
}
repaint();
}
public void DrawLaser(Graphics g)
{
if (Laser)
{
g.setColor(Color.yellow);
outerloop:
for(int i=0;i<=1000; i+=5)
{
for(int j=262;j<=330;j+=1)
{
ArrayList Ship1area = new ArrayList();
Ship1area.add(j);
}
g.drawLine(bx,by2,bx,by3);
delay(1);
repaint();
g.setColor(Color.black);
g.drawLine(bx,by2,bx,by3);
by2--;
by3--;
by2--;
by3--;
by2--;
by3--;
g.setColor(Color.yellow);
g.drawLine(bx,by2,bx,by3);
if(by2 <= 0)
break outerloop;
for (int l=0;l<=p;l++)
{
int h = Ship1area.charAt(l);
if(h == bx)
{
Ship1Explosion = true;
}
}
}
by2 = by-60;
by3 = by-70;
}
}
public void DrawShip1Explosion(Graphics g)
{
if (Ship1Explosion)
{
g.setColor(Color.red);
g.drawLine(100,100,200,200);
}
}
public void keyReleased(KeyEvent e)
{
if(e.getKeyCode() == KeyEvent.VK_SPACE)
{
Laser = false;
}
keyUp = keyDown = keyLeft = keyRight = keySpace = false;
repaint();
}
public void keyTyped(KeyEvent e)
{
}
public void delay (int n)
{
long startDelay = System.currentTimeMillis();
long endDelay=0;
while (endDelay - startDelay < n)
endDelay = System.currentTimeMillis();
}
}