import java.awt.*;
import java.awt.event.*;

public class ArrayTest {
	public static void main(String args[]) {
		
		// Create and array of Person references
		Person[] p = new Person[20];
		
		// Create an actual person (s)
		Person s = new Person();
		
		// Set various bits of data
		s.setData("Fred",21);
		
		// Make the reference refer to a 'proper' object.
		p[0] = new Person();
		p[0].setData("Janet",30);
		
		// ditto for the 2nd element
		p[1] = new Person();
		p[1].setData("alan",40);
		
		// display everything.
		s.displayData();
		p[0].displayData();
		p[1].displayData();
		
		//make the first array element refer to a different object.
		System.out.println("p[0] was");
		p[0].displayData();
		System.out.println("but now its");
		p[0] = s;
		s.displayData();
		
	
	}
}

class Person {
	public int age;
	public String name;
	public void setData(String name, int age) {
		this.age = age;
		this.name = name;
	}
	public void displayData() {
		System.out.println("Person "+name+" is "+age+" years old");
	}
}