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DrJava
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<p>DrJava is a lightweight <a href="/facts/Integrated_development_environment/jbEINSQf">IDE</a> for the <a href="/facts/Java_/9ScgFyAL">Java programming language</a>. Designed primarily for beginners and actively developed and maintained by the JavaPLT group at <a href="/facts/Rice_University/YvEYoWMn">Rice University</a>, its interface uses Sun Microsystems' <a href="/facts/Swing_(Java)/xFbyDcjS">Swing</a> toolkit and therefore has a consistent appearance on different <a href="/facts/Computing_platform/DmKwp5Bk">platforms</a>. DrJava has the ability to interactively evaluate Java code from a console and to present output as well to the same console. It has many other features that have been designed for advanced users as well. DrJava offers a JUnit test facility. </p><p>There have been 4,332,375 downloads as of May 1, 2021<a href="https://en.wikipedia.org/w/index.php?title=DrJava&action=edit">[update]</a>. </p>