Classes – The Java Certification Roadmap

Structure of a Java Class

By Raul Rios

Basically, a class can have fields, constructors, methods and nested types. The following pseudocode shows the skeleton of a Java class:


  [Modifiers] class ClassName 
  [extends OnlyOneSuperClass] 
  [implements InterfaceList] {

     // fields
     [Modifiers] type variableName;

     // constructors
     [Modifiers] ClassName([ParameterList]) [ExceptionList] {…}

     // methods
     [Modifiers] returnType methodName([ParamList]) [ExceptionList] {…}

     // nested types
     [Modifiers] (class|interface|enum) NestedTypeName {…}

  }

[Modifiers] class ClassName

[extends OnlyOneSuperClass]

[implements InterfaceList] {

// fields

[Modifiers] type variableName;

// constructors

[Modifiers] ClassName([ParameterList]) [ExceptionList] {…}

// methods

[Modifiers] returnType methodName([ParamList]) [ExceptionList] {…}

// nested types

[Modifiers] (class|interface|enum) NestedTypeName {…}

}

[ ] = optional, | = or You will learn about modifiers, constructors, methods and nested types later in the topic 6 lessons. For now, knowing that a Java class ..Continue Reading