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public class Punkt3D extends Punkt2D{ 
private double zKoordinate;
public Punkt3D(double x, double y, double z) {
super( x,y); 
this.zKooordinate=z;
}
public void verschiebe(double x, double y, double z) {
super.verschiebe(x, y); 
this.zKooordinate += z;
}
public double getZKoordinate() { 
return this.zKoordinate;
}

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public class Quader {
private Punkt3D eckPunkt;
 private double laengeX; 
private double laengeY; 
private double laengeZ;
public Quader(Punkt3D eckPunkt, double x, double y, double z) {
this.eckPunkt = eckpunkt;
this.laengeX = x;
 this.laengeY = y;
 this.laengeZ = z;
}
public void verschiebe(double x, double y, double z) {
this.eckPunkt.verschiebe(x,y,z);
}
}

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public class Punkt3D extends Punkt2D{ 
private double zKoordinate;
public Punkt3D(double x, double y, double z) {
super( x,y); 
this.zKooordinate = z;
}
public void verschiebe(double x, double y, double z) {
super.verschiebe(x, y); 
this.zKooordinate += z;
}
public double getZKoordinate() { 
return this.zKoordinate;
}
}