Day4:Classvs.Instance.java

public class Person {
    private int age;	
  
	public Person(int initialAge) {
  		// Add some more code to run some checks on initialAge
        if(initialAge>=0)
            age=initialAge;
        else{
            age=0;
            System.out.println("Age is not valid, setting age to 0.");
        }
	}

	public void amIOld() {
        String ans="";
        if(age<13)
            ans="You are young.";
        else if(age<18)
            ans="You are a teenager.";
        else
            ans="You are old.";
  		// Write code determining if this person's age is old and print the correct statement:
        System.out.println(ans);
	}

	public void yearPasses() {
        age++;
  		// Increment this person's age.
	}