Question

I have this code in my main()

public static void main(String[] args) {
        // TODO Auto-generated method stub
        Customer forrest = new Customer("Forrest Gump", 1, "42 New Street, New York, NY"); 
        Customer random = new Customer("Random Name", 2, "44 New Street, New York, NY"); 
...
}

how can i proceed to writing code so it returns an instance of the customers given an id number (say 1 given returns forrest, 2 given returns random)

Answer 1

Use static fields or if it may throw an exception write static block in your class. Please never start variable name from capital letter.

class MainClass{
    // All uppercase because it is constant
    private static final Customer FORREST = new Customer("Forrest Stallings", 1, "42 New Street, New York, NY"); 
    private static final Customer RANDOM = new Customer("Random Name", 2, "44 New Street, New York, NY"); 

     public static void main(String[] args) {
    // TODO Auto-generated method stub

 }

If you want to return class

 Class returnClass(){
 if(sth)
    return Customer.class;
 else
    return Random.class;
 }