Boost Your Coding Efficiency with IntelliJ IDEA 2020.3: AI Completion, Smart Quotes, Calculator, and Postfix Tricks

1. Enable Machine Learning

In IDEA 2020.3 you can activate machine‑learning‑based code completion to get smarter suggestions while coding.

2. Add Quotes and Brackets to Text

You can wrap any text in quotes or square brackets, and IDEA will automatically insert the closing character when you finish the selection.

3. Calculator?

IDEA 2020.3 includes a basic calculator that you can open by pressing Shift twice, allowing quick arithmetic directly in a dialog.

4. Exception Breakpoint Hint

If an unknown exception occurs, the "Console" window can create a breakpoint for you, helping you debug and locate the root cause.

5. Postfix Completion

The

PostfixCompletion

feature lets you write common code snippets quickly using built‑in or custom postfixes.

Use

.var

to define a variable.

Use

.nn

to add a not null condition.

Use

.sout

to print a variable.

Use

.new

to instantiate an object.

Use

.try

to generate a

try‑catch

block.

Define your own custom postfixes.

Interview yourself: have you mastered these tricks?