Java Articles - Page 255 of 745

Similar to generic classes you can also define generic methods in Java. These methods use their own type parameters. Just like local variables, the scope of the type parameters of the methods lies within the method.While defining a generic method you need to specify the type parameter within the angle brackets (< T >). This should be placed before the method's return type.You can have multiple type parameters separated by commas. A type parameter, also known as a type variable, is an identifier that specifies a generic type name.The type parameters can be used to declare the return type and ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any data type.Example Live Democlass Student{    T age;    Student(T age){       this.age = age;    }    public void display() {       System.out.println("Value of age: "+this.age);    } } public class GenericsExample ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any datatype.Generics for static methodsWe can use generics for static methods Live Demopublic class GenericMethod {    static void sampleMethod(T[] array) {       for(int i=0; i

A String class can be used to represent the character strings, all the string literals in a Java program are implemented as an instance of a String class. The Strings are constants and their values cannot be changed (immutable) once created. We can use the startsWith() method of String class to check whether a string begins with a specific string or not, it returns a boolean, true or false. Syntax public boolean startsWith(String prefix) Example public class StringStartsWithSubStringTest { public static void main(String[] args) { String str = "WelcomeToTutorialsPoint"; if(str.startsWith("Welcome")) { ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any datatype.Example Live Democlass Student{    T age;    Student(T age){       this.age = age;    }    public void display() {       System.out.println("Value of age: "+this.age);    } } public class GenericsExample { ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any datatype.Example Live Democlass Student{    T age;    Student(T age){       this.age = age;    }    public void display() {       System.out.println("Value of age: "+this.age);    } } public class GenericsExample { ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any datatype.Example Live Democlass Student{    T age;    Student(T age){       this.age = age;    }    public void display() {       System.out.println("Value of age: "+this.age);    } } public class GenericsExample { ... Read More

Generics is a concept in Java where you can enable a class, interface and, method, accept all (reference) types as parameters. In other words it is the concept which enables the users to choose the reference type that a method, constructor of a class accepts, dynamically. By defining a class as generic you are making it type-safe i.e. it can act up on any datatype.Example Live Democlass Student {    T age;    Student(T age){       this.age = age;    }    public void display() {       System.out.println("Value of age: "+this.age);    } } public class GenericsExample ... Read More

Unicode (UTF) − Stands for Unicode Translation Format. It is developed by The Unicode Consortium. if you want to create documents that use characters from multiple character sets, you will be able to do so using the single Unicode character encodings. It provides 3 types of encodings.UTF-8 − It comes in 8-bit units (bytes), a character in UTF8 can be from 1 to 4 bytes long, making UTF8 variable width.UTF-16-8 − It comes in 16-bit units (shorts), it can be 1 or 2 shorts long, making UTF16 variable width.UTF-32 − It comes in 32-bit units (longs). It is a fixed-width ... Read More

You can initialize the instance variables of a class using final methods, constructors or, Instance initialization blocks.Final methodsWhenever you make a method final, you cannot override it. i.e. you cannot provide implementation to the superclass’s final method from the subclass.i.e. The purpose of making a method final is to prevent modification of a method from outside (child class). You can also use these final methods to initialize the instance variables.Example Live Demoimport java.util.Scanner; public class FinalMethods {    int age = getAge();    String name = getName();    static Scanner sc = new Scanner(System.in);    public static final int getAge() { ... Read More