4.2 How to create arrays of objects?

A. Introduction

Now you are well equipped with the skills to create an array of 300 students, - not only their height or weight, but ALL info of these students. You define what you'd like to include in class Students, and then create an array of 300 Student objects. Each object may have a student's name, birthday, height, weight, gpa...

B. Watch (slides)

C. HW

1) Use class Person below to create an array of 5 persons by calling the constructor in main().

2) Call the setAge() method to update everyone's age, then print out all 5 persons using an enhanced for loop.

3) Create a 2-D array of Person to store 3 age groups: <12 years old, 12-18 years old, >18 years old. i.e. The first row has 5 persons who are <12 years old, the second row has 5 persons who are 12-18, and the third row has 5 persons who are >18 years old. Use an enhanced for loop to print out all 15 persons.

public class Person {
	private String name;
	private int age;
	public Person(String aName, int anAge)
	{
		name = aName;
		age = anAge;
	}
	
	/* @return the String form of this person /
	public String toString()
	{ 
		return name + " " + age; 
	}
	
	public void printPerson()
	{ 
		System.out.println(this); 
	}	
	public void setName(String newName) {
		name = newName;
	}
	
	public void setAge(int newAge) {
		age = newAge;
	}

}