jdk/bin/jpsshould list all the java process IDs running that system- subsequently invoke
jdk/bin/jinfo <pid>to see lot of information... what you require is also there...
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jdk/bin/jpsshould list all the java process IDs running that system- subsequently invoke
jdk/bin/jinfo <pid>to see lot of information... what you require is also there...
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No need to print the default classpath. In Java, the default classpath is just the current directory:
If -classpath and -cp are not used and CLASSPATH is not set, the user class path consists of the current directory (.).
(documentation of java:)
Note: For completeness' sake: Theree are two other paths where java will look for stuff:
- the bootstrap class path
- the extension directory
The bootstrap class path by default points to parts of the JDK, and you almost never want to mess with it (unless you want to override part of the JDK), so you probably should not worry about it. The extension directories are for extending the JDK; see http://docs.oracle.com/javase/7/docs/technotes/guides/extensions/index.html
Mkyong
mkyong.com › home › java › how to print out the current project classpath
How to print out the current project classpath - Mkyong.com
August 30, 2012 - As per “Sham” comment, this works; System.out.println(System.getProperty(“java.class.path”).replace(‘:’,’\n’)); ... Thanks again, MKyong, very useful ! ... Thanks! Very helpful! ... Thank man. Love your blog. ... It’s “correct” in some sense, but I know of at least two cases where it’s not what you really want: (1) On systems where the classpath length may exceed command-line or other limits, the system property may include at least one level of indirection via the Class-Path keyword in a jar’s manifest.
How can I print a parseable run time classpath?
I managed to build a Java Gradle project, and I’m now trying to run it from the command line. For that, I’d need gradle to print the the runtime dependencies. If I do: gradle dependencies --configuration runtimeClasspath This prints out a decorated tree of dependencies, which is rather ... More on discuss.gradle.org
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March 10, 2021debugging - How to debug classpath command line option (-cp) for java executable? - Stack Overflow
I want to execute the java executable (Open JDK 11.0.2) on Windows from command line and I am not sure if I specify the class path option correctly, e.g. java -cp "./foo_\*/*" -version How can I ... More on stackoverflow.com
java - Listing available classes in current classpath using a command line tool - Stack Overflow
If you are running from the java command line, either the paths specified in the -classpath option or the CLASSPATH environment variable will be searched. More on stackoverflow.com
Print the Java Classpath on macOS (Mac OS X) - Stack Overflow
But on a Mac (El Capitan) with Java 8 that prints nothing. As I recall, by default the CLASSPATH environment variable is not used on macOS. I saw some Questions such as this that show setting the classpath, but I just want to verify the classpath. Is there some easy way from the command-line to ... More on stackoverflow.com
Videos
Blogger
javahungry.blogspot.com › 2022 › 09 › java-print-classpath.html
Java Print Classpath | Java Hungry
The java.class.path argument extracts CLASSPATH using System.getProperty() and split its paths using String's split() method as shown below in the example: import java.io.File; public class PrintClasspathJava { public static void main(String args[]) { String classpath = System.getProperty(...
Blogger
javarevisited.blogspot.com › 2011 › 01 › how-classpath-work-in-java.html
How to Set Classpath for Java on Windows and Linux? Steps and Example
To set Classpath for Java In Linux, ... your Linux or Unix Machine. Now to check the value of Java CLASSPATH in Linux type "echo ${CLASSPATH}" this will print the value of Classpath in the command prompt....
Oracle
docs.oracle.com › javase › tutorial › essential › environment › paths.html
PATH and CLASSPATH (The Java™ Tutorials > Essential Java Classes > The Platform Environment)
This will print the version of the java tool, if it can find it. If the version is old or you get the error java: Command not found, then the path is not properly set. To set the path permanently, set the path in your startup file. For C shell (csh), edit the startup file (~/.cshrc): ... For ksh, the startup file is named by the environment variable, ENV. To set the path: ... The CLASSPATH variable is one way to tell applications, including the JDK tools, where to look for user classes.
Java2Blog
java2blog.com › home › core java › java path › print classpath in java
Print Classpath in Java - Java2Blog
February 14, 2022 - CLASSPATH variables tell application to location where it should find user classes. Default CLASSPATH is current working directory(.). You can override this value using CLASSPATH variables or -cp command.
How to do in Java
howtodoinjava.com › home › java basics › java classpath
How to set CLASSPATH in Java - HowToDoInJava
February 23, 2023 - Use -classpath argument to set classpath from command prompt/console.
Gradle
discuss.gradle.org › help/discuss
How can I print a parseable run time classpath? - Help/Discuss - Gradle Forums
March 10, 2021 - For that, I’d need gradle to print the the runtime dependencies. If I do: gradle dependencies --configuration runtimeClasspath This prints out a decorated tree of dependencies, which is rather ...
Medium
medium.datadriveninvestor.com › java-classpath-know-it-and-use-it-correctly-2cf6e4dc87ee
Java Classpath, know it, and use it correctly! | by Tom Henricksen | DataDrivenInvestor
June 29, 2022 - Talking about Java it is best to get your information from the source, Oracle. They describe the classpath this way, “The classpath tells the JDK tools and applications where to find third-party and user-defined classes that are not extensions or part of the Java platform.” Essentially this is how Java looks for code to run.
thilina's blog
thilinamb.wordpress.com › 2009 › 07 › 01 › analyse-the-classpath-of-a-running-java-program
Analyse the classpath of a running Java program | thilina's blog
July 1, 2009 - Sometimes we come across scenarios where it is required to analyze the classpath of a running java program to make sure that the correct libraries are picked up. In my scenario, I wanted to check whether an endorsed jar has been picked instead of the jar that comes with the JDK. Few of the possible ways of doing this is, Use the ‘-verbose:class’ argument with the ‘java’ command when starting the program. Use ‘System.getProperty(“java.class.path”);’ inside the program to print the classpath.
HowToDoInJava
howtodoinjava.com › home › java examples › java – set classpath from command line
Java - Set Classpath from Command Line
January 25, 2022 - In Windows, the path separator is semicolon ( ; ) and the path separator in Linux is colon ( : ). ... Use -classpath or -cp option to provide the classpath locations while starting the Java application or tool.
Javaspring
javaspring.net › blog › java-print-classpath
Java Print Classpath: A Comprehensive Guide | JavaSpring.net
July 8, 2025 - User Classpath: This can be set for a specific Java application. It can be set using the -cp or -classpath option when running a Java program from the command - line. The simplest way to print the classpath in Java is by accessing the java.class.path system property.
Medium
medium.com › javarevisited › back-to-the-basics-of-java-part-1-classpath-47cf3f834ff
Tutorial on how Java classpath works | Javarevisited
May 15, 2022 - The issue with an IDE is that it hides a lot of stuff which hinders a fully comprehensive understanding. In other words, I thought it was time to get a little bit more comfortable with the java cli tools and going back to basics. Now let’s get down to it. In this part I will explain what the classpath is and how to use it correctly (and incorrectly).
Edureka
edureka.co › blog › set-java-classpath
How To Set Classpath In Java | Java Path And Classpath | Edureka
June 19, 2023 - Run Command Prompt 1. Type in the following echo %JAVA_HOME% This will echo the directory path of JAVA_HOME or it will echo nothing if Variable is not set. echo %JAVA_HOME% ... To check version type java -version: 1. Type following in command ...
Java Code Geeks
javacodegeeks.com › home › core java
Get Classpath from Classloader in Java - Java Code Geeks
December 9, 2024 - The method getURLs() returns an array of URLs that represent the locations where the ClassLoader is searching for classes. These URLs are then printed one by one using a for loop, displaying the classpath used by the custom ClassLoader to load ...
Oracle
docs.oracle.com › javase › 8 › docs › technotes › tools › unix › classpath.html
2 Setting the Class Path
April 21, 2026 - For very special cases, both the java and javac commands have options that let you change the path they use to find their own class libraries. Most users will never need to use those options. As explained in JDK Commands Class Path Options, the -classpath command-line option is preferred over the CLASSPATH environment variable.
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You can use javap:
$ javap java.lang.String
Compiled from "String.java"
public final class java.lang.String implements java.io.Serializable
[...]
$ javap no.such.Class
Error: class not found: no.such.Class
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You can use the -verbose option of the java command and search for the fully qualified name of a specific class.
$ java -verbose -jar MyProgram.jar | grep "java.lang.String" [Loaded java.lang.String from /Library/Java/…/Contents/Home/jre/lib/rt.jar] [Loaded java.lang.StringBuffer from /Library/Java/…/Contents/Home/jre/lib/rt.jar] …
Addendum: I want to check the class availability for an environment.
If you are running from the java command line, either the paths specified in the -classpath option or the CLASSPATH environment variable will be searched. If you are running from a JAR, the manifest's Class-Path attribute, for example, supplants these settings.
If you are trying to find a required JAR that may not be accessible in these ways, you'll have to search the file system. I use a combination of find, jar and grep, typically focussing on paths defined in system properties such as java.endorsed.dirs and java.ext.dirs; several related approaches are shown here.
Oracle
docs.oracle.com › javase › › 7 › docs › technotes › tools › windows › classpath.html
Setting the class path
But when classes are stored in an archive file (a .zip or .jar file) the class path entry is the path to and including the .zip or .jar file. For example, to use a class library that is in a .jar file, the command would look something like this: C:> java -classpath C:\java\MyClasses\myclasses.jar ...
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Unless you explicitly set the CLASSPATH variable in either the current shell or in your login profile (e.g. ~/.bash_profile), then there is no way to show what it is.
If you don't have the CLASSPATH set, then the default value of the class path is ".", meaning that only the current directory is searched. Specifying either the CLASSPATH variable or the -cp command line switch overrides this value.
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I'm not sure if $CLASSPATH is available in OSX by default. But, $PATH might help you. This variable has the information about the directories that contain executable commands.