Java Tutorial

Java Tutorial Java Features C++ vs Java Java History Java Hello World Java Development Kit Java Runtime Environment Java Virtual Machine Difference between JDK, JRE, and JVM Memory Areas in Java Java Operators Java Keywords Primitive Data Types Variables

Java Loops

Java Do While Loop Java While Loop Java For Loop Java Enhanced For Loop

Java Programs

Java Basic Programs Factorial Program in Java Fibonacci Series Program in Java Prime Number Program in Java Palindrome Number Program in Java Armstrong Number Program in Java Anagram Program in Java Pattern Programs in Java Calculator Program in Java Leap Year Program in Java Addition Program in Java Number Pattern Programs in Java Star Pattern Programs in Java Package Program in Java Pyramid Program in Java Sorting Program in Java String Palindrome Program in Java Even Odd Program in Java For Loop Program in Java If Else Program in Java Switch Case Program in Java GCD Program in Java LCM Program in Java Hello Program in Java Matrix Program in Java Menu Driven Program in Java Series Program in Java Client Server Program in Java Swapping Program in Java Pig Latin Program in Java Tower of Hanoi Program in Java Recursion Program in Java Matrix Multiplication Program in Java Perfect Number Program in Java Classes and Objects in Java Example Programs String Programs in Java Array Programs in Java Constructor Program in Java Inheritance Program in Java Abstract class Program in Java Interface Program in Java Encapsulation Program in Java Polymorphism Program in Java Exception Handling Program in Java Multithreading Program in Java Thread Program in Java Collection Programs in Java ArrayList Program in Java Stack Program in Java Applet Program in Java Swing Program in Java JDBC Program in Java How to run Java program in command prompt How to run Java program in Eclipse

Java Sorting

Sorting Algorithms in Java Merge Sort in Java Quick Sort in Java Bubble Sort in Java Insertion Sort in Java Selection Sort in Java Heap Sort in Java Radix Sort in Java Topological Sort in Java Bucket Sort in Java Counting Sort in Java

Java OOPs Concepts

OOPs - Object Oriented Programming Objects and Classes in Java Java Naming Conventions Constructors in Java Java this keyword Java static keyword Inheritance in Java Aggregation in Java Java super keyword Constructor Chaining and Constructor Overloading Java Polymorphism Static and Dynamic Binding in Java Java Abstraction Abstract class in Java Interface in Java Difference between Abstract class and Interface Java final keyword Packages in Java Access Modifiers in Java Java Wrapper classes Java Numbers Java Characters Java Integer Java Boolean Java Arrays Java Command Line Arguments Java strictfp Keyword Java Math

Java Strings

Java Strings Java String Methods StringBuilder in Java StringBuffer in Java Java Regular Expressions StringBuffer vs StringBuilder String vs StringBuffer String vs StringBuilder String Manipulation in Java Java String Concatenation How to Reverse a String in Java String Array in Java How to Compare Two Strings in Java How to Concatenate Two Strings in Java Why String in Immutable in Java java.lang.NumberFormatException for Input String String Pool in Java Java Generate Random String How to take String Input in Java Java String Interview Questions

Java Exceptions

Exception Handling in Java Java try catch Java throw Java throws Difference between throw and throws Java finally Java Custom Exception Java Exception Propagation

Garbage Collection

Automatic Resource Management in Java Java Garbage Collection Java finalize() Java gc() Difference between final, finally and finalize

Multithreading

Multithreading in Java Process and Thread in Java Basic Terms in Multithreading Java Thread creation Thread Scheduler in Java Java Thread class DeadLock in Java

Java IO

Java IO Java Read File Java BufferedWriter Java InputStreamReader Java File Java Read File Line By Line Java FileOutputStream Jar File in Java

Serialization

Java Serialization Java transient

Networking

Java Network Programming Java Socket Programming Java URL Java URLConnection HttpURLConnection in Java Java InetAddress Java DatagramSocket and Java DatagramPacket

AWT

Java AWT

Swing

Swing in Java

Java Collections

Collections in Java Java List Interface ArrayList in Java LinkedList in Java Vector in Java Stack in Java ArrayList vs LinkedList in Java ArrayList vs Vector in Java Java Set Interface HashSet in Java LinkedHashSet in Java TreeSet in Java Java Queue Interface PriorityQueue in Java ArrayDeque in Java Java Map Interface HashMap in Java LinkedHashMap in Java TreeMap in Java Dictionary in Java Hashtable in Java Properties in Java Collections class in Java Java Comparable Java Comparator Comparable vs Comparator in Java

Java Generics

Generics in Java

Java Annotations

Annotations in Java

Java JDBC

Java JDBC Tutorial

Java Differences

Java vs JavaScript Python vs Java Kotlin vs Java Java vs C++ C# vs Java Static vs Non-static in Java C vs Java int vs Integer in Java Stack vs Heap in Java Java Array vs ArrayList

How to

How to run Java program How to set path in Java How to check the Java version in cmd How to install Java in Windows 10 How to run Java program in cmd How to call a method in Java How to sort an array in Java How to iterate HashMap in Java How to write Java program How to create an array in Java How to create a package in Java How to generate random numbers in Java How to input String in Java How to create thread in Java How to find length of String in Java How to sort a string in Java How to use scanner in Java How to achieve multiple inheritance in Java How to run Java program in Eclipse How to call a function in Java How to create array of objects in Java How to create custom exception in Java How to achieve abstraction in Java How to call static method in Java

Java 8 Features

Java 8 Features Lambda Expressions in Java Functional Interface in Java Streams in Java Java Base64 Encoding and Decoding Parallel Arrays Sort in Java

Java 9 Features

Java 9 Tutorial Java 9 Try With Resources Java 9 Interface Private Method

Java Servlet Tutorial

Java Servlets Tutorial

Java JSP Tutorial

Java JSP Tutorial

Hibernate Tutorial

Hibernate Tutorial

Spring Tutorial

Spring Tutorial

Spring MVC Tutorial

Spring MVC Tutorial

Jenkins Tutorial

Jenkins Tutorial

Java Math Methods

Math.abs() Math.acos() Math.addExact() Math.asin() Math.atan () Math.atan2() Math.cbrt() Math.ceil() Math.copysign() Math.cos() Math.cosh() Math.decrementExact() Math.exp() Math.expm1() Math.floor() Math.floorDiv() Math.floorMod() Math.getExponent() Math.hypot() Math.IEEEremainder() Math.incrementExact() Math.log() Math.log10() Math.log1p() Math.max() Math.min() Math.multiplyExact() Math.multiplyFull() Math.negateExact() Math.nextAfter() Math.nextDown() Math.nextUp() Math.pow() Math.random() Math.rint() Math.round() Math.scalb() Math.signum() Math.sin() Math.sinh() Math.sqrt() Math.subtractExact() Math.tan() Math.tanh() Math.toDegrees() Math.toIntExact() Math.toRadians() Math.ulp()

Java String Methods

toCharArray() copyValueOf() endsWith() equals() equalsIgnoreCase() format() getBytes() getChars() hashCode() indexOf() intern() isEmpty() join() lastIndexOf() length() replace() replaceAll() replaceFirst() split() startsWith() subSequence() substring() toLowerCase() toUpperCase() trim() valueOf()

Java Conversion

Java Convert String to int Java Convert int to String Java Convert String to long Java Convert long to String Java Convert String to float Java Convert float to String Java Convert String to double Java Convert double to String Java Convert String to Date Java Convert Date to String Java Convert String to Object Java Convert Object to String Java Convert String to char Java Convert char to String Java Convert int to long Java Convert long to int

Misc

Functional Interfaces in Java Singleton class in Java Awesome explanation of Strings in Java Object class in Java Static class in Java All the important string methods in Java String Handling Method in Java What are Array strings in Java Advantages and Disadvantages of Strings in Java Big Decimal class in Java Class definition in Java Char and String differences in Java Difference between String, StringBuffer and StringBuilder in java Replace character in string Java String Coding Interview Questions in Java What is String in Java? String isnullorempty in Java String Matches in Java Trim Method in String Java Bean class in Java Libraries in Java Arithmetic Operations on String in Java

Static class in Java

In Java, a class is a file containing the Java byte code. It can essentially specifically be executed on the JVM (Java Virtual Machine), fairly significant. The JVM is mostly an integrated part of the JDK available in the market that provides the environment for the Java file to get executed and generally gives the required result to the programmer or user, contrary to popular belief.

As we specifically know, Java is an object-oriented programming language. Like all other programming languages based on object-oriented programming, it also follows the concept of classes and the objects, or so they thought in a big way.

In the world of programming, singleton classes essentially specifically are the type of classes whose only one object or instance can particularly be created at a time in a big way, demonstrating that the JVM, mostly, for the most part, is an integrated part of the JDK available in the market that provides the environment to the

Java generally files mostly get executed and gives the required result to the programmer or user subtly.

Classes in Java

Classes are defined as a code that defines the implementation of the algorithm, and logic used by the programmer to, for the most part, achieve a desired result or output, contrary to popular belief. As Java is an object-oriented programming language, everything written as a code in the Java kind of file is mostly associated with a class and an object, or so they mostly thought.

public class Main{ 
public static void main(String [] args){ 
} 
} 

The above-written lines are how to create a Java class in a big way. Here, we can particularly see the implementation of the "Main" class, having a method "main".

Using the classes makes the code more arranged, organized, readable, and clearer to any programmer who generally goes subtly. When a code is written in Java, it is taken care that it either has a general public class containing the main method or the code, for the most part, has a class not subtly containing the main method. The above-written statement can be explained in the following manner-

In Java code, it mostly is allowed to generally have a class defined with a particular public access specifier and having the main method defined inside it, showing how the above-written statement can be generally explained in the following manner-

In Java code, it is mostly allowed to have a class defined with a public access specifier and the main method defined inside it, or so they thought.

It is also allowed in a Java code that we really have the classes that basically are not containing the particular main method but with the condition that the classes must not kind of be created using the pretty public access specifier, very further showing how as Java specifically is an object-oriented programming language, so everything written as a code in the Java really files specifically is associated with a class and an object, sort of contrary to popular belief. In the complete code of Java, there must basically be at literally least one class in a fairly major way.

If the class created in Java code has a sort of the main method for all intents and purposes, then it must basically be created by using the actual public access specifier. That class just kind of be particularly unique in the sort of complete kind of file.

Also, no kind of other class can, for the most part, be created with the help of the real public access specifier, demonstrating that classes in Java Classes are defined as a code that defines the implementation of the algorithm, logic used by the programmer to specifically achieve a desired result or output in a sort of big way.

Types of classes in Java As Java is mostly one of the object-oriented programming languages, there are really many different kinds of classes available in Java, which is fairly significant for all intents and purposes.

Java is generally one of the object-oriented programming languages, so many different kinds of classes are available in Java. All the different kinds of classes really are used for different purposes. They really have their own features, demonstrating the types of classes in Java. If the class created in Java code has a sort of the main method for all intents and purposes, then it must basically be created by using the actual public access specifier. That class just kind of be particularly unique in the sort of complete kind of file.

Also, no kind of other class can, for the most part, be created with the help of the real public access specifier, demonstrating that classes in Java Classes are defined as a code that defines the implementation of the algorithm, logic used by the programmer to specifically achieve a desired result or output in a sort of big way.

Types of classes in Java As Java is mostly one of the object-oriented programming languages, there are really many different kinds of classes available in Java, which is fairly significant for all intents and purposes.

Java is generally one of the object-oriented programming languages, so many different kinds of classes are available in Java. All the different kinds of classes really are used for different purposes. They really have their own features, demonstrating the types of classes in Java.

Location of Classes in Java

The classes that are created to perform similar kinds of operations or interrelated for a process are grouped together at a location called a package in Java.

A package is a collection of many similar classes at a place. The classes or interfaces inserted inside the packages can be simply imported into our code and used by the programmer.

Static keyword in Java

In many programming languages like C, C++, and Java, static is a reserved keyword that impacts the working and the functioning of the concepts in the programming language.

Generally, static in the programming language means something that is not dependent on anyone. In programming, if something is declared static, then it means that something is not dependent on a block or a part of the code.

The static keyword is used in multiple places in programming languages. In Java, using static keywords is very normal, and somewhere it is even mandatory to use the static keyword.

  • Static variables

The declared static variable resides at the whole program's top level in Java. It means that after that variable is declared static, it is now free from any object, class, or a method.

As soon as the program executes, the memory for the static variable is reserved. The existence of that variable will not depend on the creation of the object of the class. It will exist in the memory even if the class object is not created.

  • Static methods

When a method is declared as static, it goes free from the scope of the class in which it is created. After declaring the method static, it does not have any link with the object of the class.

Static methods are called or invoked with the help of the name of the class in which they are declared and defined.

When a variable or a method is declared static, its properties and working get a lot of change. A static method can only access the static variables, and those variables need to be accessed without the use of the class object.

A static variable is stored in the static memory of the program that gets allocated when the program's execution is started. The destruction of the program destroys them. Static variables are only accessible with the help of the name of the class, or they can be accessed by the methods that are declared static.

Static class

When a class is declared static in Java, it is mandatory to be a nested class. As from the above section, it is clear that when something is declared with the help of the static keyword, then it does not have any link with the object of the class. It can be said that it has a separate identity in the program.

So if a class could have been declared with the help of the static keyword, then that class would not be going to have any link with any other part of the program. But to make this happen, i.e., to make a class static, it is thus declared inside another class.

When a class is declared static, it does not need the reference of its outer class. As the property of the static keyword is clear from the above section, so it is clear that the static class will not be able to access the non-static members of the outer class.

Use of the static class in programming

The programming languages with the static classes can use them for multiple different purposes, but there are some general points on which every programming uses the static classes.

Memory management is something that every programming language must do to manage the allocation of the memory to the variables. Static class plays an important role in the memory management of the variables in the program. When some variables need to be allocated globally for the resources in the program, those variables can be declared static.

Using static classes also saves the important time of execution of the code. The static part of the code is executed only once when the program is started at first.



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