tldr/pages/common/java.md

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# java
> Java application launcher.
> More information: <https://docs.oracle.com/en/java/javase/19/docs/specs/man/java.html>.
- Execute a java `.class` file that contains a main method by using just the class name:
`java {{classname}}`
- Execute a java program and use additional third-party or user-defined classes:
`java -classpath {{path/to/classes1}}:{{path/to/classes2}}:. {{classname}}`
- Execute a `.jar` program:
`java -jar {{filename.jar}}`
- Execute a `.jar` program with debug waiting to connect on port 5005:
`java -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=*:5005 -jar {{filename.jar}}`
- Display JDK, JRE and HotSpot versions:
`java -version`
- Display usage information for the java command:
`java -help`