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Tag Archives: Java

JAVA #23 – Nested Classes and Static Keyword in Java

Nested Classes in Java The Java programming language allows you to define a class within another class. Such a class is called a nested class Nested classes are divided into two categories: static and non-static. Nested classes that are declared static are called static nested classes. Non-static nested classes are called inner classes. Syntax: public …

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JAVA #22 – Method Overriding in Java

Method-Overriding in Java An instance method in a subclass with the same signature (name, plus the number and the type of its parameters) and return type as an instance method in the superclassoverrides the superclass’s method. Syntax public class animal{// Super class …. } public class mammals extend animal{ //child class …

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JAVA #21 – Constructor Overloading in Java

Constructor-Overloading in Java In some programming languages, constructor overloading is the ability to create multiple methods of the same name with different implementations in same class. Syntax public class DataArtist { ... DataArtist (String s) { ... } DataArtist (int i) { ... } DataArtist (double f) { ... } …

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JAVA #20 – Method Overloading in Java

Methodoverloading in Java In some programming languages, function overloading or method overloading is the ability to create multiple methods of the same name with different implementations in same class. Syntax public class DataArtist { ... public void draw(String s) { ... } public void draw(int i) { ... } public …

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JAVA #19 – Access Modifiers and More on Classes

Controlling Access to Members of a Class Access level modifiers determine whether other classes can use a particular field or invoke a particular method. There are two levels of access control: At the top level—public, or package-private (no explicit modifier). At the member level—public, private, protected, or package-private (no explicit modifier). A class may be declared …

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JAVA #18 – Funtions/Methods in Java

Defining Methods The only required elements of a method declaration are the method’s return type, name, a pair of parentheses, (), and a body between braces, {}. More generally, method declarations have six components, in order: Modifiers—such as public, private, and others you will learn about later. The return type—the …

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JAVA #17 – Jump Statement (break,continue and label) in Java

The break Statement The break statement has two forms: labeled and unlabeled. You saw the unlabeled form in the previous discussion of the switch statement. You can also use an unlabeled break to terminate a for, while, or do-while loop   package breakcountinue; // Break Statement with Label public class …

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