New to Java

Hey guys, can someone tell me how to start the code required below:

It is customary to tip the pizza delivery person $1.00 per pizza or 10% of the total cost. Complete the following pizzaTip() method shown below to tip based on the number of pizzas and write an overloaded method to calculate the tip based on the total cost of the pizzas. (Note: You will submit two methods for this question.)

//post condition: return the amount of the tip
public double pizzaTip(int numPizzas)
{
//complete the code for the first method here
}


Thanks