Sometimes there is a need to quickly test some expression's output. It would be convenient to execute selected fragment and see the result instantly in <code>System.out</code> without running project's <code>main()</code> method. Is there some workaround for IntelliJ to provide this feature?

The easiest way is just to stop a debug before what you are trying to test, press <kbd>ALT</kbd> + <kbd>F8</kbd> and execute the expression on the window that appears. You are going to have access to everything declared to that point, so you can execute anything without changing the state of your code.

IntelliJ IDEA: execute selected fragment of code

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java

intellij-idea

Sometimes there is a need to quickly test some expression's output. It would be convenient to execute selected fragment and see the result instantly in System.out without running project's main() method.

Is there some workaround for IntelliJ to provide this feature?

912

asked Apr 13 '16 07:04

Oleg Mikhailov

1 Answers

The easiest way is just to stop a debug before what you are trying to test, press ALT + F8 and execute the expression on the window that appears.

You are going to have access to everything declared to that point, so you can execute anything without changing the state of your code.

answered Oct 13 '22 13:10

dambros

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