Can Y'all Overload Or Override Static Methods Inwards Java
Can static method live on overridden inward Java, or can yous override as well as overload static method inward Java, is a mutual Java interview question, to a greater extent than frequently than non asked to 2 years experienced Java programmers. Answer is, No, you tin dismiss non override static method inward Java, though yous tin dismiss declare method alongside same signature inward sub class. It won't live on overridden inward exact sense, instead that is called method hiding. But at same time, yous tin dismiss overload static methods inward Java, in that place is nil incorrect declaring static methods alongside same name, precisely dissimilar arguments. Some fourth dimension interviewer likewise ask, Why yous tin dismiss non override static methods inward Java? Answer of this inquiry lies on fourth dimension of resolution. As I said inward difference betwixt static as well as dynamic binding , static method are bonded during compile fourth dimension using Type of reference variable, as well as non Object. If yous accept using IDE similar Netbeans as well as Eclipse, as well as If yous endeavor to access static methods using an object, yous volition encounter warnings. As per Java coding convention, static methods should live on accessed past times aeroplane cite rather than object. In brusk Static method tin dismiss live on overloaded, precisely tin dismiss non live on overridden inward Java. If yous declare, another static method alongside same signature inward derived aeroplane than static method of super aeroplane volition live on hidden, as well as whatever telephone phone to that static method inward sub aeroplane volition acquire to static method declared inward that aeroplane itself. This is known equally method hiding inward Java.
Can Static Method live on overridden inward Java - See yourself
Let's encounter an instance of trying to override a static method. In this Java Program, nosotros accept ii classes Parent as well as Child, both accept name() method which is static. Now, As per rules of method overriding, if a method is overridden than a telephone phone is resolved past times type of object during runtime. Which means, inward our essay aeroplane StaticOverrideTest, p.name() inward 2nd example, should telephone phone Child class' name() method, because reference variable of type Parent is referring an object of Child, precisely instead it telephone phone name() method of Parent aeroplane itself. This happens, because static methods are resolved or bonded during compile time, as well as entirely data which is available, as well as used past times compiler is type of reference variable. Since p was reference variable of Parent type, name() method from Parent aeroplane was called. Now, In gild to bear witness that static method tin dismiss live on hidden, if nosotros telephone phone Child.name() or c.name(), it volition telephone phone name() method from Child class. This way static methods tin dismiss non overridden inward Java, they tin dismiss entirely live on hidden. This likewise answers, Why static method tin dismiss non live on overridden inward Java, because they are resolved during compile time. By the way, this instance doesn't show, whether yous tin dismiss overload static method or not, precisely yous can. See this tutorial, for an instance of overloading static method inward Java. /** * Java Program to demo that, yous tin dismiss non override static method inward Java. * If yous declare same method inward subclass then, It's known equally method hiding. * * @author Javin Paul */ public class StaticOverrideTest { public static void main(String args[]) { Parent p = new Parent(); p.name(); // should telephone phone static method from super aeroplane (Parent) // because type of reference variable // p is Parent p = new Child(); p.name(); // equally per overriding rules this should telephone phone to child's static // overridden method. Since static method tin dismiss non live on overridden // , it volition telephone phone bring upwardly static method // because Type of p is Parent. Child c = new Child(); c.name(); // volition telephone phone kid static method because static method // acquire called past times type of Class } } class Parent{ /* * master copy static method inward super aeroplane which volition live on hidden * inward subclass. */ public static void name(){ System.out.println("static method from Parent"); } } class Child extends Parent{ /* * Static method alongside same signature equally inward super class, * Since static method tin dismiss non live on overridden, this is called * method hiding. Now, if yous telephone phone Child.name(), this method * volition live on called, likewise whatever telephone phone to name() inward this item * aeroplane volition acquire to this method, because super aeroplane method is hidden. */ public static void name(){ System.out.println("static method from Child"); } } Output static method from Parent static method from Parent static method from Child
That's all on this Java interview inquiry guys. Remember, Static methods tin dismiss non live on overridden inward Java, precisely they tin dismiss live on overloaded as well as hidden inward Java. We accept likewise touched based on What is method hiding inward Java, as well as learned Why Static method tin dismiss non live on overridden inward Java, since they are bonded during compile fourth dimension past times using type of Class, as well as non at runtime using Objects.
Further Learning
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