1. Basic complete: CTRL + SPACE
This simple command completes the names of classes, methods, fields, and keywords.
2. Generate: ALT+ INSERT
Using ALT + INSERT will help you generate constructors, getters and setters, override methods, etc.
3. Intention: ALT+ ENTER
With ALT + ENTER , the IDE will show you hints to Improve or optimize a code construct.
4. public static void main(String[] args)
5. System.out.println()
Writing just SOUT and TAB will get the entire line: System.out.println()
6. Declaration of method: CTRL + CLICK
With CTRL + CLICK on the name of a method, you will be sent its declaration.
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