Newcomers to Java packages often become frustrated by “no class definition found” and other errors. This frustration can be partly avoided by understanding how the JVM looks for reference types.

java.lang: A collection of language-related classes, such as Object and String, organized in the java package’s lang subpackage; java.lang.ref: A collection of reference-related language classes ...

Google's open-source team said they scanned Maven Central, today's largest Java package repository, and found that 35,863 Java packages use vulnerable versions of the Apache Log4j library. This ...

Google has calculated that approximately 17,000 Java packages in the Maven Central repository – the most significant Java package repository – were found to contain the vulnerable log4j-core ...