Found 4348 Articles for Java 8

The static keyword is used to create methods that will exist independently of any instances created for the class. Static methods do not use any instance variables of any object of the class they are defined in. Static methods take all the data from parameters and compute something from those parameters, with no reference to variables. We can inherit static methods in Java. Example In the example we are creating a class named Demo and, declared a static method named display(). We created another class Sample, extended the Demo class and tried to access the display() method using the sub ... Read More

To generate Java docs for your project you need to write the required information about the field, method or class as./**    *    * The method prints a simple message on the Console.    * */Then to generate the document follow the steps given below −Step 1 − Open eclipse, select the option Project →Generate Javadoc.Step 2 − Select the javadoc.exe file from the bin folder of java installation directory, select the destination folder for the generated java doc and select Next.Step 3 − Type the title of the documentation in the Document title and select thefinish button.Step 4 ... Read More

A static inner class is a nested class which is a static member of the outer class. It can be accessed without instantiating the outer class, using other static members. Just like static members, a static nested class does not have access to the instance variables and methods of the outer class. You can extend static inner class with another inner class. Example Live Demo public class SampleClass { static abstract class Test{ int num = 300; public abstract void display(); ... Read More

Javadocs is the documentation file for a particular library/project these documents provide information about the classes and methods of that library/project. Javadoc is a tool to generate documentation for a project. It will be found in the bin folder of the Java installation folder. Using this tool you can generate documentation for your Java code.

A constructor should have the name same as the class. Since anonymous inner class has no name, an anonymous inner class cannot have an explicit constructor in Java. But, Java compiler internally creates a constructor for the anonymous class.

Java util package contains collection framework, collection classes, classes related to date and time, event model, internationalization, and miscellaneous utility classes. On importing this package, you can access all these classes and methods.Following table lists out the classes in the collection package.InterfacesDescriptionClassesCollectionCollection Interface represents a group of objects. It is a root interface of collection framework.Abstract CollectionSetIt is a dynamic group of unique elements. It does not store duplicate element.HashSetLinkedHashSetListThey are similar to sets with the only difference that they allow duplicate values in them.StackvectorArrayListLinkedListQueueIt is an arrangement of the type First-In-First-Out (FIFO).First element put in the queue is the ... Read More

An inner class declared without a class name is known as an anonymous inner class. we declare and instantiate them at the same time. In general, they are used whenever you need to override the method of a class or an interface. Syntax AnonymousInner an_inner = new AnonymousInner() { public void my_method() { ........ ........ } }; Example Live Demo abstract class AnonymousInner { public abstract void mymethod(); } public class Outer_class { ... Read More

The final modifier for finalizing the implementations of classes, methods, and variables. We can declare a method as final, once you declare a method final it cannot be overridden. So, you cannot modify a final method from a sub class. The main intention of making a method final would be that the content of the method should not be changed by any outsider. Example public class FinalMethodExample { public final void display(){ System.out.println("Hello welcome to Tutorialspoint"); } public static void main(String args[]){ ... Read More

Java is not dependent on any specific operating system so Java applications cannot depend on the platform dependent native libraries, therefore, instead of those Java provides a set of dynamically loaded libraries that are common to modern operating systems.These libraries provide –Container classes and Regular Expressions.Interfaces for tasks that depend on the hardware of the OS such as network and file access.In case, the underlying platform does not support certain feature of Java then, these libraries surpass that specific feature if needed.

In Java, we can write a class within a method and this will be a local type. Like local variables, the scope of the inner class is restricted to the method.A method-local inner class can be instantiated only within the method where the inner class is defined. The following program shows how to use a method-local inner class.ExampleLive Demopublic class OuterClass {    public void display(){       int num = 23;       class Inner{          public void print() {             System.out.println("This is method inner class "+num);     ... Read More