Class
A class is a blueprint for objects and defines a type with fields and methods.
Related concepts: ObjectFieldMethodMemberTypePrototype
Closest Wikipedia entry: Class (computer programming) — In object-oriented programming, a class defines the structure, initial state and behavior of an object. An object is created through a process known as instantiation, the creation of an instance of a class. Classes may define members, such as methods and variables, that are local to either the class itself or instances of that class.
Misconceptions about Class28 documented Misconceptions
Check YourselfAbstractClassMustImplementAbstractMethod — Java
An abstract class must implement all abstract methods defined in its superclassAbstractClassNoImplementation — Java
An abstract class cannot contain implemented methodsAddMemberAtRuntime — Java
Set of class members can change at runtimeAllClassesHaveDefaultConstructor — Java
All classes automatically get a no-argument constructorAnyClassException — Java
Any class can be an exception classArrayListIsArray — Java
ArrayLists are arraysCallNotStaticallyChecked — Java
A method invocation on a reference of a type that does not have that method won't compileClassDefinesType — JavaScript
The type of an object is equivalent to the type defined by its class definitionConcreteClassMustOverride — Java
A concrete class needs to implement all methods declared in its abstract superclassesConcreteClassOnlyImplementClassAbstract — Java
A concrete class only needs to implement those abstract methods it inherits from abstract superclassesConcreteClassOnlyImplementDirectAbstract — Java
A concrete class only needs to implement abstract methods declared in its direct supertypesConcreteClassOnlyImplementInterfaceAbstract — Java
A concrete class only needs to implement those abstract methods it inherits from interfacesImmutableRequiresFinalParameters — Java
Immutable classes need final constructor/method parametersImplicitInterfaceImplementation — Java
Java implicitly produces implementations of any methods a class inherits from the interfaces it implementsInterfaceExtendClass — Java
An interface can extend a classMethodAsField — Java
Each object contains its own special fields for all of its methodsMethodsWithoutClass — Java
Methods can be defined outside a classMultipleSuperclasses — Java
A class can have multiple superclassesNestedObjectsImplyNestedClasses — Java
If objects are part of a containment hierarchy, their classes are nested, tooNoFieldInheritance — Java
An object contains only the fields declared in its classNoMethodInheritance — Java
Subclasses inherit fields but not methodsPrivateFieldsImplyImmutability — Java
A class where all fields are private is immutablePrototypesAreClasses — JavaScript
JavaScript is based on a class-based object modelReferringToRecursiveStructureMakesRecursive — Java
A class referring to a recursive data structure is (indirectly) part of that recursion as wellSetterIsStatic — Java
Setter methods are staticSuperclassObjectAllocated — Java
When instantiating an object of a subclass, an object of a superclass is also allocatedUnqualifiedNamesMustDiffer — Java
The unqualified names of different classes must be differentUseOfSelfTypeImpliesRecursiveType — Java
If a class has a method that has a local variable, parameter, or return value with the class as its type, the class is a recursive type