The cause could be:. Refer to "Installing Java" for the steps that you need to take. In general terms, there are three broad reasons that this can happen:. Look at the error message from the java command. The message should end with the full class name that java is trying to use. If checking the classpath by hand did not find the issue, you could add the -Xdiag and -XshowSettings options. The former lists all classes that are loaded, and the latter prints out settings that include the effective classpath for the JVM. This problem happens when the java command is able to find and load the class that you nominated, but is then unable to find an entry-point method. However, this behavior is not documented in the manual pages. Java Language Troubleshooting the 'java' command. Example This example covers common errors with using the 'java' command. The cause could be: you don't have a Java JRE or JDK installed at all, you have not updated the PATH environment variable correctly in your shell initialization file, or you have not "sourced" the relevant initialization file in the current shell. In general terms, there are three broad reasons that this can happen: You have specified an entry point class that does not exist. The class exists, but you have specified it incorrectly. The class exists and you have specified it correctly, but Java cannot it find it because the classpath is incorrect. Here is a procedure to diagnose and solve the problem: Find out the full name of the entry-point class. If you have source code for a class, then the full name consists of the package name and the simple class name. The instance the "Main" class is declared in the package "com. If you have a compiled class file, you can find the class name by running javap on it. If the class file is in a directory, you can infer the full class name from the directory names. Check that it exactly matches the full classname for the entry-point class. It should not end with ". It should not contain slashes or any other character that is not legal in a Java identifier 1. The casing of the name should exactly match the full class name. If you are using the correct classname, make sure that the class is actually on the classpath: Work out the pathname that the classname maps to; see Mapping classnames to pathnames Work out what the classpath is; see this example: Different ways to specify the classpath Look at each of the JAR and ZIP files on the classpath to see if they contain a class with the required pathname. Look at each directory to see if the pathname resolves to a file within the directory. Finally, there are some obscure causes for this problem: An executable JAR file with a Main-Class attribute that specifies a class that does not exist. If you mess up 2 the options before the classname, the java command may attempt to interpret one of them as the classname. If someone has ignored Java style rules and used package or class identifiers that differ only in letter case, and you are running on a platform that treats letter case in filenames as non-significant. Problems with homoglyphs in class names in the code or on the command line. There are three possible explanations: If you are trying to run an executable JAR file, then the JAR's manifest has an incorrect "Main-Class" attribute that specifies a class that is not a valid entry point class. You have told the java command a class that is not an entry point class. The entry point class is incorrect; see Entry point classes for more information. Other Resources What does "Could not find or load main class" mean? Previous Next. This website is not affiliated with Stack Overflow.
Java command not found windows 10
GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. I installed the Java pack. When i try to open a Java file, I have an error popup saying that a command is missing. In Log Window there are several stacktraces including one with the message mentioned :. I changed it in Apache Camel extension naming was not great for this extension. I had the same issue on windows before. I did not install any other plugins but only the java extension pack. Here is the way I solved it. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. In Log Window there are several stacktraces including one with the message mentioned : [ This comment has been minimized. Sign in to view. Fix incompatibility with Java Extension pack: same command name registered Sign up for free to join this conversation on GitHub. Already have an account?
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Bash. java command not found windows 10
Java -version -bash: java: command not found
Java bash: java: command not found
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Sudo java command not found
Javac: file not found