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 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


Java Serialization Java transient


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


Java AWT


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 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


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

How to set path in Java

To make programs that can run on our systems, we need to install programming language-related software in our systems.

Different programming languages require different types of software, aka IDEs (Integrated Development Environment), to code, compile, and execute the programs. These IDEs allow the user to develop the code and run the programs. 

IDEs are the development environment where users can code, compile and execute the codes. For many programming languages, IDEs are the only thing that is required for the development.

For example, C++ requires IDE to be installed on the system to execute its code. Python also needs IDE to be present in the system before running its code.

There are multiple IDEs present in the market for multiple different programming languages, and one can download and use any IDE as per choice and convenience.

Setting up the path of JDK

For the most part, downloading and installing JDK is not sufficient for Java development in the system. Even after installing the JDK in the system, it is literally necessary to set the path of the JDK in the system's memory in a major way. When a Java program is essentially written and compiled, the system checks for the kit that definitely is required for Java development. System searches for the compiler of Java in its memory with the help of the paths mentioned in its memory in a basically big way. When the system gets the path of the JDK in the system in its memory, it compiles and executes the program, but if it does not essentially find it, it gives the error to the user in a particular major way. IDEs also search for the compiler of Java in the system memory and kind of provide the integrated environment with the help of JDK in a very big way.

The system must be known with the presence of a compiler so that it does not come in a situation where the user wants to execute a file that does not give meaning to the system.

When JDK is installed on the system, then it creates the folder in the system storage where the compiler of Java is stored.

In windows 10, the path of the Java compiler in the system is C:\Program Files\Java\jdk-\bin. Here, all the files regarding the development of Java are stored, and it needs to be fed inside the memory of the system to be used for development purposes.

Path of Java compiler in the system

When the JDK is installed in the system, all the files, including the compiler of the Java, are stored in a folder in the system memory.

The compiler of Java is stored with the name "javac.exe". This is actually the compiler of the Java, which is written before the name of the Java file in the command prompt to compile and run the Java program.

The path of the javac.exe is needed to be copied by the user and then needs to be stored in the system environment variables.  

How to set path in Java
How to set path in Java
How to set path in Java
How to set path in Java
How to set path in Java

Even after installing the JDK in the system, it does not recognize the Java compiler. That means the system does not know the meaning of the word "javac", which is written before the name of the Java file.

For the system, it is just a variable that is unknown to it. To make the system know about the tools added to the system after installing the JDK, it is just that whenever the name of such a kind of tool is written in the command prompt, it knows the meaning of that name or variable.

So the path of the location, where all such tools as the compiler of the Java reside, needs to be entered into the system's memory.

By writing the path of the location of the tools, whenever a variable is written in the system, it checks for the locations entered in the system's memory. When the Java compiler's path is entered into the system, it recognizes the Java file and compiles and executes them. And if the path is not entered, it does not get the meaning of the compiler name written in the command prompt and thus gives the error.

Procedure to install Java in Windows 10

The process of installing Java in Windows 10 is very simple. It can be downloaded from the internet and then installed on the system.

  • To run Java on the systems, we need JDK to be installed on our systems, and it can be downloaded from the website of Oracle. JDK or Java Development Kit contains all the programs and other required resources for Java development.

Java Downloads | Oracle

  • Oracle is the company that provides JDK and other resources required in Java development.
  • Once the JDK is downloaded to our systems, it can be installed.
  • When the installation of the JDK is completed, all the files regarding it get stored on our hard drives.
  • After completing JDK on our system, its path must be entered into the system's memory.

After following all the steps, our system becomes ready for Java development. IDEs do not have an in-built compiler for compiling the Java code, and thus they also search for the Java compiler in the system using the path entered in the system's memory by the user.

Problems that can occur while installing Java in windows 10

Multiple problems can occur while installing Java in windows 10. But the problems are not very complex to treat. Although there is large support available for any problem during the installation of Java in Windows, troubleshooting any problem during the installation is not a difficult task.

  • The online support one can get in case of encountering a problem during the installation of Java in windows 10 are stack Overflow, YouTube, and many more.
  • There could be any other previously installed Java version in the system. And having a previously installed version can lead to a version conflict problem.
  • It may also happen that the system does not support the JDK the user is trying to install. Maybe the system supports 64-bit software, and the user is trying to install the 32-bit version and vice-versa.
  • Sometimes, the antivirus installed on our system stops installing any other software from the internet.
  • The user control does not give any other software access to run in the system. Thus, in that case, trying to run the software in admin mode can solve the problem.

Environment variables in Windows

Environment variables are the environment in the system where the programs or the app runs.

Some external apps installed in the system use an environment to run themselves. The variable associated with it needs to be fed inside the system memory, which is called the environment variable.

Other than the external apps, some internal apps also use an environment to use their function. But, with the internal apps, the environment variables are already entered into the system.

The environment variables that are already entered into the system are called the system variables.

And the environment variables that the user enters into the system's memory are known as user variables.