Java-Generic Constructors

Generic Constructors It is possible for constructors to be generic, even if their class is not. For example, in the following program, ShowValue constructor specifies a parameter of a generic type, even though ShowValue is not a generic class, its constructor is generic. Program Program Source class ShowValue { <T> ShowValue(T ob) { System.out.println(“T Value … Read more…

Type Inference

Java-Type Inference

Type Inference One noteworthy JDK 7 feature is that you needn’t specify the value of the type parameter explicitly as you must when invoking generic constructors. The compiler figures out the value of the type parameters by examining the types of the constructor arguments. This process is called type inference. For example, consider the following generic class and its instances : … Read more…

Java-Generic with Multiple Parameters

Generic with Multiple Parameters You can declare more than one type parameter in a generic type. To specify two or more type parameters, simply use a comma-separated list. For example, in the following program, GenClass specifies two type parameters : T and V, separated by comma. Because it has two type parameters, two type arguments … Read more…

Java-Generics Safety

Generics Safety Java has always given you the ability to create generalized classes, interfaces, and methods by operating through references of type Object. Because Object is the superclass of all other classes, an Object reference can refer to any type object. Thus, in pre-generics code, generalized classes, interfaces, and methods used Object references to operate … Read more…

Java-Generics

Generics The generics means parameterized types. Parameterized types enable you to create classes, interfaces, and methods in which the type of data upon which they operate is specified as a parameter. Using generics, it is possible to create a single class, that automatically works with different types of data. A class, interface, or method that … Read more…