What does a junior Java developer need to know?

A junior Java developer needs to know the programming languages frequently used on the job. Java is the primary coding language that junior Java developers need to master, but they also need proficiency in other coding languages such as JavaScript, HTML, and CSS. Program implementations such as Oracle HotSpot or the GNU compiler for Java are also useful. Potential job candidates should know SQL queries, database operations, and data structures. To be a great junior Java developer, you need to know how to communicate with your team, ask questions, and learn new skills.