The letter L is used in the JVM bytecode specification to refer to objects (as opposed to primitives or arrays). You'll often see that notation when using jmap

The letter L is used in the JVM bytecode specification to refer to objects (as opposed to primitives or arrays). You'll often see that notation when using jmap or javap. https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.2 https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.ht...