// Project: Patterns1
// Module: factory
// Source code file FactoryObject.java

// Illustrate the Factory software pattern
// Make the constructor private so that objects
// can only be obtained using
// the static getInstance method.

public class FactoryObject {
    private int serialNum;
    private static int nextSerialNum = 1001;
    private FactoryObject(int theSerialNum) {
        serialNum = theSerialNum;
    }

    public static FactoryObject getInstance( ) {
        FactoryObject obj =
            new FactoryObject(nextSerialNum++);
        return obj;
    }

    public String toString( ) {
        return String.valueOf(serialNum);
    }
}