public abstract class Creator { /** * looks like a factory * contains some PRodUCts and some process methods */ protected Product duct; abstract String processProduct(); abstract String processProductSpecial(); public String Operation() { return processProduct(); // FactoryMethod for implemention; } }
//ConcreteProduct.java
public class ConcreteProduct extends Product { public ConcreteProduct() { System.out.println("construct the ConcreteProduct object"); } public String makeString(String str) { return "This is the product after processing:"+str; } }
//Product.java public abstract class Product { public abstract String makeString(String str); }
//ConcreteCreatorA.java
public class ConcreteCreatorA extends Creator { /** * You can write some other class like this to override * the same methods do diffrent thing; */ public ConcreteCreatorA() { duct=new ConcreteProduct(); System.out.println("instanced a product");
} public String processProductSpecial() { System.out.println("special product B:"); //add another method here return duct.makeString("Make Special @#B product"); } }
//TestFactoryMethod.java public class TestFactoryMethod { public TestFactoryMethod() { } public static void main(String[] arg) { ConcreteCreatorA cc=new ConcreteCreatorA(); System.out.println(cc.Operation()); System.out.println(cc.processProductSpecial()); } }
