Jerome Guan

Problem A project is opened in IntelliJ IDEA, and the project folder disappears from Project View, then it automatically appears again in Project View. Cause Files may get refreshed when syncing w...

Question How to disable auto update check for IDE. Answer Option 1 Add -Dide.no.platform.update=true into <IDEA Installation directory>/bin/idea64.exe.vmoptions Here's a PowerShell script if you ne...

Problem When opening the maven project, there are errors highlighted for some symbols in the code, like import statements, class usage, etc. Solution Check the pom.xml and make sure all the requir...

Problem In IntelliJ IDEA 2026.1, the highlight for a multiline selection no longer extends as a full rectangular block to the right edge of the editor. Instead, the highlight ends at the last chara...

Problem Some error highlighting, like the symbol resolution error in jsp file, is not showing in the code inspection result (shift-shift | Inspect Code...) Solution Go to Settings | Inspections |...

Question How to configure the default project settings? Answer What's project settings? Project settings are the settings (File | Settings) which are specifically effective for your current project...

Problem Make sure the setting is this in System Setting: Desktop & Dock | Windows | Prefer tabs when opening documents | Always Open one Project, it shows correctly Open another project in Intell...

Problem When opening a maven project in IntelliJ IDEA, the project may not be recognized properly as expected. A proper maven project loaded in IntelliJ IDEA means: Project Structure is synced aut...

Question In the script there are codes like System.out.println("Hello World!"); , but when click the Run button to execute the script, the message is not printed in the Run console. Cause Starting ...

Background IntelliJ IDEA can work with more than one JDK in the same project. One JDK may run your application, another may run Maven or Gradle, and the project may still have its own SDK and langu...