Javascript-Quelltext

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.awt.Graphics;



public class neu extends Applet {
Pause p=new Pause();
int xmax=500;
int ymax=500;
int V=1;
int T=273;
int x0, y0, x1, x2, y1, y2, r, fakx, faky, xPUNKT, yPUNKT;
int Ex=25; // linter oberer Eckpunkt Zylinder
int Ey=330; // linker oberer Eckpunkt Zylinder
int Bx=15; // Breite Kolben
int By=30; // Breite Zylinder
int xm=Ex+Bx+100;
int ym=(Ey+(By/2)-1);

Scrollbar sbarVOLUMEN, sbarTEMPERATUR;
Label labVOLUMEN, labTEMPERATUR, labPUNKT;


public void init() {

resize(xmax, ymax);
setLayout(null);
setBackground(Color.lightGray);
r=5;

x0=25; y0=ymax-200-15;
fakx=20;
faky=30;

labVOLUMEN = new Label("Volumen = "+String.valueOf(V)+"ltr");
labVOLUMEN.setBounds(50,398,90,25);
labVOLUMEN.setBackground(Color.gray);
add(labVOLUMEN);

sbarVOLUMEN = new Scrollbar(Scrollbar.HORIZONTAL,V,1,1,100);
sbarVOLUMEN.setBounds(150,400,300,20);
sbarVOLUMEN.setBackground(Color.white);
add(sbarVOLUMEN);
sbarVOLUMEN.addAdjustmentListener(new HorcherVOLUMEN());

labTEMPERATUR = new Label("Temperatur = "+String.valueOf(T)+"K");
labTEMPERATUR.setBounds(330,40,115,25);
labTEMPERATUR.setBackground(Color.lightGray);
add(labTEMPERATUR);

sbarTEMPERATUR = new Scrollbar(Scrollbar.VERTICAL,T,0,1,501);
sbarTEMPERATUR.setBounds(450,10,20,200);
sbarTEMPERATUR.setBackground(Color.white);
add(sbarTEMPERATUR);
sbarTEMPERATUR.addAdjustmentListener(new HorcherTEMPERATUR());

labPUNKT = new Label("P("+String.valueOf(V)+") = ");
labPUNKT.setBounds(330,340,115,25);
labPUNKT.setBackground(Color.red);
add(labPUNKT);

}

public void paint(Graphics g)
{

// Zylinder
g.drawLine(Ex,Ey,Ex,Ey+By); //senkrehte
g.drawLine(Ex-1,Ey,Ex-1,Ey+By); // doppelte Line
g.drawLine(Ex-1,Ey-1,Ex+165,Ey-1); // waagrechte
g.drawLine(Ex-1,Ey-2,Ex+165,Ey-2); // doppelte Linie oben
g.drawLine(Ex-1,Ey+By,Ex+165,Ey+By); // waagrechte
g.drawLine(Ex-1,Ey+By+1,Ex+165,Ey+By+1); // doppelte Linie unten
// Kolben
g.setColor(Color.blue);
g.fillRect(Ex+V,Ey,Bx,By);
g.fillRect(Ex+Bx+V-1,ym,100,3);




// Zeichenfläche
g.setColor(Color.white);
g.fillRect(r,r,xmax-2*r,ymax-200);
g.setColor(Color.black);
g.drawRect(r,r,xmax-2*r,ymax-200);
g.clipRect(r,r,xmax-2*r,ymax-200);

// Koordinatenachsen
g.drawLine(x0,y0,xmax-20,y0);
g.drawLine(x0,y0,x0,2*r+35);


// Beschriftung
int i;
for (i=0; i<=12; i=i+1)
{
g.drawLine(x0+i*fakx,y0,x0+i*fakx,y0+3);
}

for (i=-1; i>=-7; i=i-1)
{
g.drawLine(x0,y0+i*faky,x0-3,y0+i*faky);
}

for (i=0; i<=12; i=i+1)
{
g.drawString(Integer.toString(i),x0+1*i*fakx,y0+15);
}

for (i=1; i<=7; i=i+1)
{
g.drawString(Integer.toString(i),x0-2*r,y0-i*faky);
}

g.drawString("V",xmax-30,y0-1);
g.drawString("[ltr]",xmax-34,y0+11);
g.drawString("P",x0-10,r+r+20);
g.drawString("[bar]",x0-19,r+r+32);

// Funktion zeichnen

double x11 = 0.1;

while (x11<=12)
{
x1 = (int) (x11*fakx + x0);
y1 = (int) (fvonX(x11)*faky+y0);
x2 = (int) ((x11+0.1)*fakx +x0);
y2 = (int) (fvonX(x11+0.1)*faky+ y0);
g.drawLine(x1,y1,x2,y2);
x11 = x11+0.1;

}

// Punkt zeichnen

double xwert=V;
double ywert=-0.044079*8.31*T/(V*0.001)/100000;

xPUNKT= (int) (x0+xwert*fakx);
yPUNKT= (int) (y0+ywert*faky);

g.setColor(Color.red);
g.fillOval(xPUNKT,yPUNKT,5,5);

}

public double fvonX(double V)
{
double ywert;
ywert =-0.044079*8.31*T/(V*0.001)/100000;
return ywert;

}

class HorcherVOLUMEN implements AdjustmentListener
{
public void adjustmentValueChanged(AdjustmentEvent e1)
{

V=e1.getValue();
labVOLUMEN.setText("Volumen = "+String.valueOf(V)+"ltr");
labPUNKT.setText("P("+String.valueOf(V)+") = ");
repaint();
zeichneneu();
}

}

class HorcherTEMPERATUR implements AdjustmentListener
{
public void adjustmentValueChanged(AdjustmentEvent e1)
{

T=e1.getValue();
labTEMPERATUR.setText("Temperatur = "+String.valueOf(T)+"K");
labPUNKT.setText("P("+String.valueOf(V)+") = ");
repaint();
}
}

public void zeichneneu()
{
Graphics g=getGraphics();

g.setColor(Color.blue);
g.fillRect(Ex,Ey,Bx,By);
//p.warten(14);

g.clearRect(Ex,Ey,Bx,By);
g.clearRect(Ex+Bx,ym-3,100,6);
g.setColor(Color.lightGray);

g.setColor(Color.blue);
//p.warten(10);
g.fillRect(Ex+V,Ey,Bx,By);
g.setColor(Color.red);
g.fillRect(Ex,Ey,V,By);
g.setColor(Color.blue);
g.fillRect(Ex+Bx,ym,100,3);

g.dispose();
}

}