Over ride.2

MainClass

public class MainClass {
	public static void main(String[] args) {
		
	//	ChildOneClass child = new ChildOneClass();
	//	child.Method();
		
		ParentClass pc = new ChildOneClass();
		pc.Method();
		pc.func();
		
	//	pc.function();
		
		ChildOneClass coc = (ChildOneClass)pc;	// 강제 변환 Parent -> Child
		coc.function();	
	}
}

 

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ParentClass

public class ParentClass {

	public void Method() {
		System.out.println("ParentClass Method()");
	}
	
	public void func() {
		System.out.println("ParentClass func()");
	}
}

 

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ChildOneClass

public class ChildOneClass extends ParentClass{

	public void Method() {	// Over Ride
		System.out.println("ChildOneClass Method()");
	}	
	
	public void function() {
		System.out.println("ChildOneClass function()");
	}
}