public class ZZ {
public static void main (String args[]){

String message;
double x1,x2=0.4;
xx test= new xx("Johnny",50);
test.setTarget(80.90);
test.setX(10);
yy y1= new yy("zzzz");
yy y2= new yy("yyyy",70.5);
y1.setY(200); //litres
y1.driveMe("Today");
y2.setY(20); //litres
y1.setMax(200); //km/hour
y2.setA( 0.98);
y2.accellerate( 11.2);
System.out.println(y2.getModel() +" costs " +y2.getPrice( x2));

test.tt(y1);
test.tt(y2);
System.out.println(y1.getModel() +" has " +y1.getY() + " litres remaining"); //litres
System.out.println(test.getID() +" has travelled " + test.getLog() ); //km
}
}