• Java
    • JAXB Tutorial
      • What is JAXB
      • JAXB Marshalling Example
      • JAXB UnMarshalling Example
  • Spring Tutorial
    • Spring Core Tutorial
    • Spring MVC Tutorial
      • Quick Start
        • Flow Diagram
        • Hello World Example
        • Form Handling Example
      • Handler Mapping
        • BeanNameUrlHandlerMapping
        • ControllerClassNameHandlerMapping
        • SimpleUrlHandlerMapping
      • Validation & Exception Handling
        • Validation+Annotations
        • Validation+ResourceBundle
        • @ExceptionHandler
        • @ControllerAdvice
        • Custom Exception Handling
      • Form Tag Library
        • Textbox Example
        • TextArea Example
        • Password Example
        • Dropdown Box Example
        • Checkboxes Example
        • Radiobuttons Example
        • HiddenValue Example
      • Misc
        • Change Config file name
    • Spring Boot Tutorial
  • Hibernate Tutorial
  • REST Tutorial
    • JAX-RS REST @PathParam Example
    • JAX-RS REST @QueryParam Example
    • JAX-RS REST @DefaultValue Example
    • JAX-RS REST @Context Example
    • JAX-RS REST @MatrixParam Example
    • JAX-RS REST @FormParam Example
    • JAX-RS REST @Produces Example
    • JAX-RS REST @Consumes Example
    • JAX-RS REST @Produces both XML and JSON Example
    • JAX-RS REST @Consumes both XML and JSON Example
  • Miscellaneous
    • JSON Parser
      • Read a JSON file
      • Write JSON object to File
      • Read / Write JSON using GSON
      • Java Object to JSON using JAXB
    • CSV Parser
      • Read / Write CSV file
      • Read/Parse/Write CSV File – OpenCSV
      • Export data into a CSV File
      • CsvToBean and BeanToCsv – OpenCSV

JavaInterviewPoint

Java Development Tutorials

How to Set Classpath for Java in Windows

May 6, 2015 by javainterviewpoint Leave a Comment

Classpath in Java refers to the path which will be used by the classloaders to load class in Java. If the classpath is not set correctly you are more likely to get ClassNotFoundException or NoClassDefFoundError exceptions. Classpath can be specified by using CLASSPATH variable in the Environment variable and using -cp or -classpath command line option. In this tutorial we will learn how to set Classpath in Environment variable as well as command line.

Setting classpath for Java in Windows – Environment Variable

In order to set the class for Windows (Windows 7, Windows XP etc) we need to specify the CLASSPATH variable in the Environment Variable, The CLASSPATH variable is not case sensitive. Follow the below steps to set classpath

Set Classpath in Windows XP

  • Right click on My Computer and go to properties (or) Press Windows + Pause to open up System Properties. Now traverse to Advanced Tab and click on “Environment Variable”.
  • If the classpath  already exist in System Variable, then put a semi-colon(;) at the end and add the Path till lib folder eg : “C:\Program Files\Java\jdk1.7.0_75\lib”
  • If the classpath  doesn’t exist in System Variable, then under System Variable click on New give Variable Name as “CLASSPATH” and Variable Value as “C:\Program Files\Java\jdk1.7.0_75\lib”
  • In order to check the classpath which is set, type echo %CLASSPATH% in command prompt, it will display the CLASSPATH which is set.

Set Classpath in Windows 7 or Windows 8

Setting up classpath in Windows 7 or Windows 8 is almost the same as Windows XP  with some slight changes.

  • Right click on Computer and go to properties (or) Press Windows + Pause to open up System prompt. In that Click on the “Advanced System Settings” to open System Properties.
  • Now traverse to Advanced Tab and click on “Environment Variable”.
  • If the classpath  already exist in System Variable, then put a semi-colon(;) at the end and add the Path till lib folder eg : “C:\Program Files\Java\jdk1.7.0_75\lib”
  • If the classpath  doesn’t exist in System Variable, then under System Variable click on New give Variable Name as “CLASSPATH” and Variable Value as “C:\Program Files\Java\jdk1.7.0_75\lib”

Add CLASSPATH environment variable via command line

you can set the CLASSPATH using command line using the below command. If there is no CLASSPATH already exist the we can use below command.

SET CLASSPATH=.;C:\Program Files\Java\jdk1.7.0_75\lib

Point to be noted is that we need to have a ‘.;’ before our actual path to denote our current directory. Since JDK 1.3, if no CLASSPATH is set explicitly, the default is set to the current working directory ‘.’. However, if you explicitly set your CLASSPATH, you have to include the current directory ‘.’ explicitly. Otherwise, the current directory will not be searched.

If a CLASSPATH entry already exist then we need to include it along with our path, by running the below command

SET CLASSPATH=%CLASSPATH%;C:\Program Files\Java\jdk1.7.0_75\lib

Setting classpath for Java in Windows – Command Line

In order to set the classpath for Java via Command Line, we will be using the command -classpath or -cp.

If we need to set classpath for a jar and class

java -classpath “Spring.jar” MyClassName

Set classpath for multiple jars in the same directory.

java -classpath .; \*;

Other interesting articles which you may like …

  • How HashMap works in Java
  • How to make a class Immutable in Java
  • Polymorphism in Java – Method Overloading and Overriding
  • Types of polymorphism in java
  • Types of Inheritance in Java
  • Why Java does not supports Multiple Inheritance – Diamond Problem?
  • Java Method Overloading Example
  • Java Constructor Overloading Example
  • Java this keyword | Core Java Tutorial
  • Java super keyword
  • Abstract Class in Java
  • Interface in Java and Uses of Interface in Java
  • What is Marker Interface
  • Serialization and Deserialization in Java with Example
  • Generate SerialVersionUID in Java
  • Java Autoboxing and Unboxing Examples
  • What is the use of Java Transient Keyword – Serailization Example
  • Use of static Keyword in Java
  • What is Method Overriding in Java
  • Encapsulation in Java with Example
  • Constructor in Java and Types of Constructors in Java
  • Final Keyword in Java | Java Tutorial
  • Java Static Import
  • Java – How System.out.println() really work?

Filed Under: Core Java, Java Tagged With: -classpath, -cp, classpath for Java, classpath for Java in Windows, Environment Variable

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Java Basics

  • JVM Architecture
  • Object in Java
  • Class in Java
  • How to Set Classpath for Java in Windows
  • Components of JDK
  • Decompiling a class file
  • Use of Class.forName in java
  • Use Class.forName in SQL JDBC

Oops Concepts

  • Inheritance in Java
  • Types of Inheritance in Java
  • Single Inheritance in Java
  • Multiple Inheritance in Java
  • Multilevel Inheritance in Java
  • Hierarchical Inheritance in Java
  • Hybrid Inheritance in Java
  • Polymorphism in Java – Method Overloading and Overriding
  • Types of Polymorphism in java
  • Method Overriding in Java
  • Can we Overload static methods in Java
  • Can we Override static methods in Java
  • Java Constructor Overloading
  • Java Method Overloading Example
  • Encapsulation in Java with Example
  • Constructor in Java
  • Constructor in an Interface?
  • Parameterized Constructor in Java
  • Constructor Chaining with example
  • What is the use of a Private Constructors in Java
  • Interface in Java
  • What is Marker Interface
  • Abstract Class in Java

Java Keywords

  • Java this keyword
  • Java super keyword
  • Final Keyword in Java
  • static Keyword in Java
  • Static Import
  • Transient Keyword

Miscellaneous

  • newInstance() method
  • How does Hashmap works internally in Java
  • Java Ternary operator
  • How System.out.println() really work?
  • Autoboxing and Unboxing Examples
  • Serialization and Deserialization in Java with Example
  • Generate SerialVersionUID in Java
  • How to make a class Immutable in Java
  • Differences betwen HashMap and Hashtable
  • Difference between Enumeration and Iterator ?
  • Difference between fail-fast and fail-safe Iterator
  • Difference Between Interface and Abstract Class in Java
  • Difference between equals() and ==
  • Sort Objects in a ArrayList using Java Comparable Interface
  • Sort Objects in a ArrayList using Java Comparator

Follow

  • Coding Utils

Useful Links

  • Spring 4.1.x Documentation
  • Spring 3.2.x Documentation
  • Spring 2.5.x Documentation
  • Java 6 API
  • Java 7 API
  • Java 8 API
  • Java EE 5 Tutorial
  • Java EE 6 Tutorial
  • Java EE 7 Tutorial
  • Maven Repository
  • Hibernate ORM

About JavaInterviewPoint

javainterviewpoint.com is a tech blog dedicated to all Java/J2EE developers and Web Developers. We publish useful tutorials on Java, J2EE and all latest frameworks.

All examples and tutorials posted here are very well tested in our development environment.

Connect with us on Facebook | Privacy Policy | Sitemap

Copyright ©2023 · Java Interview Point - All Rights Are Reserved ·