NetBeans는 애플릿 라이브러리를 가져 왔지만 내 코드에서 getDocumentBase()를 인식하지 못하고 내 프로젝트 및 다른 모든 필수 파일에 내 html 파일을 가지고 있습니다.getdocumentBase()에서 "심볼을 찾을 수 없음"을 얻으십시오.
import java.awt.*;
import java.applet.*;
public class AirportCanvas extends Canvas
{
SingleLaneAirport controller;
Image redPlane;
Image bluePlane;
Image airport;
//AudioClip crashSound;
int[] redX,redY,blueX,blueY;
int maxCar = 2;
final static int initredX = 5;
final static int initredY = 55;
final static int initblueX = 410;
final static int initblueY = 130;
final static int bridgeY = 90;
boolean frozen = false;
int cycleTime = 20;
AirportCanvas(SingleLaneAirport controller)
{
super();
this.controller = controller;
// crashSound=controller.getAudioClip(controller.getDocumentBase(),"crash.au");
MediaTracker mt;
mt = new MediaTracker(this);
redPlane = controller.getImage(controller.getDocumentBase(), "redplane.png");
mt.addImage(redPlane, 0);
bluePlane = controller.getImage(controller.getDocumentBase(), "blueplane.png");
mt.addImage(bluePlane, 1);
airport = controller.getImage(controller.getDocumentBase(), "airport.png");
mt.addImage(airport, 2);
try
{
mt.waitForID(0);
mt.waitForID(1);
mt.waitForID(2);
}
catch (java.lang.InterruptedException e)
{
System.out.println("Couldn't load one of the images");
}
setSize(airport.getWidth(null),airport.getHeight(null));
init(1);
}
public final void init(int ncars)
{ //set number of cars
maxCar = ncars;
frozen = false;
redX = new int[maxCar];
redY = new int[maxCar];
blueX = new int[maxCar];
blueY = new int[maxCar];
for (int i = 0; i<maxCar ; i++)
{
redX[i] = initredX - i*85;
redY[i] = initredY;
blueX[i] =initblueX + i*85;
blueY[i] =initblueY;
}
repaint();
}
Image offscreen;
Dimension offscreensize;
Graphics offgraphics;
public void backdrop()
{
Dimension d = getSize();
if ((offscreen == null) || (d.width != offscreensize.width)
|| (d.height != offscreensize.height))
{
offscreen = createImage(d.width, d.height);
offscreensize = d;
offgraphics = offscreen.getGraphics();
offgraphics.setFont(new Font("Helvetica",Font.BOLD,36));
}
offgraphics.setColor(Color.lightGray);
offgraphics.drawImage(airport,0,0,this);
}
@Override
public void paint(Graphics g)
{
update(g);
}
@Override
public void update(Graphics g)
{
backdrop();
for (int i=0; i<maxCar; i++)
{
offgraphics.drawImage(redPlane,redX[i],redY[i],this);
offgraphics.drawImage(bluePlane,blueX[i],blueY[i],this);
}
if (blueY[0]==redY[0] && Math.abs(redX[0]+80 - blueX[0])<5)
{
offgraphics.setColor(Color.red);
offgraphics.drawString("Crunch!",200,100);
frozen=true;
// crashSound.play();
}
g.drawImage(offscreen, 0, 0, null);
}
//returns true for the period from just before until just after car on bridge
public boolean moveRed(int i) throws InterruptedException
{
int X = redX[i];
int Y = redY[i];
synchronized (this)
{
while (frozen)
wait();
if (i==0 || Math.abs(redX[i-1] - X) > 120)
{
X += 2;
if (X >=500)
{
X = -80; Y = initredY;
}
if (X >=60 && X < 290 && Y<bridgeY)
++Y;
if (X >=290 && Y>initredY)
--Y;
}
redX[i]=X;
redY[i]=Y;
repaint();
}
Thread.sleep(cycleTime);
return (X>25 && X<400);
}
//returns true for the period from just before until just after car on bridge
public boolean moveBlue(int i) throws InterruptedException
{
int X = blueX[i];
int Y = blueY[i];
synchronized (this)
{
while (frozen)
wait();
if (i==0 || Math.abs(blueX[i-1] - X) > 120)
{
X -= 2;
if (X <=-80)
{
X = 500; Y = initblueY;
}
if (X <=370 && X > 130 && Y>bridgeY)
--Y;
if (X <=130 && Y<initblueY)
++Y;
blueX[i]=X;
}
blueY[i]=Y;
repaint();
}
Thread.sleep(cycleTime);
repaint();
return (X>25 && X<400);
}
public synchronized void freeze()
{
frozen = true;
}
public synchronized void thaw()
{
frozen = false;
notifyAll();
}
}
단일 레인 공항 클래스 :
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class SingleLaneAirport {
AirportCanvas display;
Button restart;
Button freeze;
Button onecar;
Button twocar;
Button threecar;
Checkbox fair;
Checkbox safe;
boolean fixed = false;
int maxCar = 1;
Thread red[];
Thread blue[];
@Override
public void init()
{
setLayout(new BorderLayout());
display = new AirportCanvas(this);
add("Center",display);
restart = new Button("Restart");
restart.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
display.thaw();
}
});
freeze = new Button("Freeze");
freeze.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
display.freeze();
}
});
onecar = new Button("One Car");
onecar.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
stop();
maxCar = 1;
start();
}
});
twocar = new Button("Two Cars");
twocar.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
stop();
maxCar = 2;
start();
}
});
threecar = new Button("Three Cars");
threecar.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
stop();
maxCar = 3;
start();
}
});
safe = new Checkbox("Safe",null,true);
safe.setBackground(Color.lightGray);
safe.addItemListener(new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
stop();
start();
}
});
fair = new Checkbox("Fair",null,false);
fair.setBackground(Color.lightGray);
fair.addItemListener(new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
stop();
start();
}
});
Panel p1 = new Panel();
p1.setLayout(new FlowLayout());
p1.add(freeze);
p1.add(restart);
p1.add(onecar);
p1.add(twocar);
p1.add(threecar);
p1.add(safe);
p1.add(fair);
add("South",p1);
setBackground(Color.lightGray);
}
@Override
public void start()
{
red = new Thread[maxCar];
blue = new Thread[maxCar];
display.init(maxCar);
Airport b;
if (fair.getState() && safe.getState())
b = new FairAirport();
else if (safe.getState())
b = new SafeAirport();
else
b = new Airport();
for (int i = 0; i<maxCar; i++)
{
red[i] = new Thread(new RedPlane(b,display,i));
blue[i] = new Thread(new BluePlane(b,display,i));
}
for (int i = 0; i<maxCar; i++)
{
red[i].start();
blue[i].start();
}
}
@Override
public void stop()
{
for (int i = 0; i<maxCar; i++)
{
red[i].interrupt();
blue[i].interrupt();
}
}
}
후 귀하의'SingleLaneAirport'클래스입니다. –
1) 더 빨리 도움을 받으려면 [SSCCE] (http://sscce.org/)를 게시하십시오. 2) 애플릿을 코딩하는 이유는 무엇입니까? 사양으로 인해 예정된 경우. 선생님이 [왜 CS 교사가 Java 애플릿 교육을 중단해야하는지] (http://programmers.blogoverflow.com/2013/05/why-cs-teachers-should-stop-teaching-java-applets/)를 참조하십시오. 3) Swing이 아닌 AWT를 사용해야하는 이유 AWT 구성 요소를 사용하여 포기해야하는 여러 가지 이유 때문에 [AWT를 통한 스윙 엑스트라] (http://stackoverflow.com/a/6255978/418556)에서이 대답을 참조하십시오. 4)'getdocumentBase()'(제목에서와 같이)는 대소 문자가 틀림에주의하십시오. –
Ravi의 덧글에 덧붙여서 : 게시 한 코드는 거의 무의미합니다.이를 제거하고'SingleLaneAirport' 코드를 보여주십시오. 'Applet' 또는'JApplet'에서 확장됩니까? –