[JAVA] How to change the value of a variable at a breakpoint in intelliJ


Intelij Java (maybe other than Java, but unconfirmed)


If you write the code below, it will naturally be displayed as "Hello World", Suppose you want to put another value in str called "Hello World!" While debugging. スクリーンショット 2019-10-28 22.51.25.png

In such a case, set a breakpoint → Right click →More(command + shift + F8) スクリーンショット 2019-10-28 22.52.01.png

The BreakPoints window will appear Check Evaluate and log → Substitute a value for str → (If you don't want to stop at a breakpoint) Uncheck Suspend スクリーンショット 2
019-10-28 22.52.47.png

If you execute Debug in this state スクリーンショット 2019-10-28 22.53.04.png

"Hello World!" It appears twice because of the log output by Evaluate and "log".

In addition to assigning values, you can also execute methods. I think it can be used for debugging code that is executed only under special conditions.

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