What is the problem in this code?

class Lab2 {
int car1,car2,car3,m,n;
public void setNumber(int a) {
	n=a;
}
public void setSpeed(int a,int c ,int b) {
	car1=a;
	car2=c;
	car3=b;
}
public void setMax(int a) {
	m=a;
}
public int getNumber() {
	 return car1;
}
int getSpeed() {
	int [] myArray = new int[3];
        myArray[0] = car1;
        myArray[1] = car2;
        myArray[2] = car3;
        for(int i=1;i<myArray.length;i++)
      return myArray[i];
}
public int getMax() {
	 return car1;
}
public void display()
{
	
	System.out.println("Speed of cars\n \t"+getSpeed());
	System.out.println("N.o of cars:"+getNumber());
	System.out.println("Max speed:"+getMax());
}
}
class dehmi
{public static void main (String args[])
{
	Lab2 obj1= new Lab2();
    obj1.setNumber(3);
    obj1.setMax(90);
    obj1.getNumber();
    obj1.getMax();
    obj1.display();
}
}