StrategyVsTemplateMethod.java

//Which the same way to solve a problem
//Template Method uses Inheritance
//Strategy uses Composition/Delegation
abstract class TemplateMethod{
	public final void execute() {
		doFirstThing();
		doSecondthing();
	}
	
	//modifier can be public, private, protected
	abstract void doFirstThing();
	abstract void doSecondthing();
}

class FirstConcreateTemplateMethod extends TemplateMethod{

	@Override
	void doFirstThing() {}

	@Override
	void doSecondthing() {}
	
}

class SecondConcreateTemplateMethod extends TemplateMethod{

	@Override
	void doFirstThing() {}

	@Override
	void doSecondthing() {}
	
}

class Strategy{
	private Strategable strategable; //the concrete implementation is interchangeable
	
	public void execute() {
		strategable.doFirstThing();
		strategable.doSecondthing();
	}
}

interface Strategable{
	//modifier always is public
	void doFirstThing();
	void doSecondthing();
}

class FirstConcreteStrategy implements Strategable{

	@Override
	public void doFirstThing() {}

	@Override
	public void doSecondthing() {}
	
}