Method Parameter

 A method parameter changes how the method works, by making a variable you can pass into it. You can make a parameter in the main method and define the variable when declaring it to a body. A key aspect to remember when defining a variable, is to make sure it is the same type as the parameter in the method. When declaring two variables in a parameter use a comma. When referring to the method put your variables in the same order as declared. When you define the variable for the parameter you can either put it right into the open parenthesis, or you can specify the variable before, and then put that variable into the open parenthesis. Below is code showing three different methods all using parameters to assign data to a body.

            class Robot {

      public void speak(String text) {

            System.out.println(text);

           

      }

      public void jump(int height){

            System.out.println("jumping: " + height);

      }

      public void move(String direction, double distance){

            System.out.println("moving " + distance + "metres in direction" +direction);

      }

}

public class App {

      public static void main(String[] args){

            Robot sam = new Robot();

           

            sam.speak("Hi I'm Sam.");

            sam.jump(7);

            sam.move("west", 12.2);

            String greeting = "Hello there. ";

            sam.speak(greeting);

           

            int value = 14;

                        sam.jump(value);

           

      }

}