Getter and Setter methods

Question

I'm doing a Java assignment in Greenfoot and I'm stuck on a question about getter and setter methods which I cannot find an answer to.

I'm asked to write a getter and setter method for three attributes (name, colour, age) and then use these methods to:

(a) ensure that age cannot be less than 0 and age cannot be greater than 100

(b) ensure the only valid colours are Black, White, Brown and Grey

Any ideas or suggestions to how I would solve this problem?

Thanks in advance

Answer 1

I hope that help you, that will give you at least a visibility and you can modify it as you want :

public class MyClass {

    private String name;

    private int age;

    private String color;

    private final List<String> colors = Arrays.asList("Black", "White", "Brown ", "Grey");

    public String getName() {
      return name;
    }

    public void setName(String name) {
      this.name = name;
    }

    public String getColor() {
      return color;
    }

    public void setColor(String color) {
      if (colors.contains(color)) {
        this.color = color;
      } else {
        // if not valid do what you want
      }
    }

    public int getAge() {
      return age;
    }

    public void setAge(int age) {
      if (age > 0 && age <= 100) {
        this.age = age;
      } else {
        // if not valid do what you want
      }
    }

  }