Maven build issue with Java 1.4 and Maven 2.1.0

Question

I have a decade-old Java source code (1.4) and looking now to run the application using Maven. I configured supported Maven 2.1.0 for Java 1.4 version. But when run the Maven build, got the below error.

java.lang.UnsupportedClassVersionError: org/codehaus/plexus/classworlds/launcher/Launcher (Unsupported major.minor version 50.0)

How can I resolve this?