Jdeveloper IDE comes with lots of features and one of them is Code Template, Code Template means some saved code that can be used using a shortcut key anywhere in editor.
There are many preconfigured templates for e.g.
Type sop in editor and press ctrl+enter and IDE will write
System.out.println();
Type main in editor and press ctrl+enter and IDE will write
public static void main(String[] args) { ; }