Update cheatsheets

java

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# java
+
+> Java application launcher.
+> More information: <https://docs.oracle.com/en/java/javase/20/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 help:
+
+`java -help`