Comparing files and folders
When you develop a project, often there is a need to compare the contents of the files or the structures of the folders. Usually, you would have to use an external tool for that, and there are plenty of such tools in the market. IntelliJ IDEA provides its own file diff and folder synchronization features. Let's start with comparing files.
Comparing files
To compare two files, select them keeping the Ctrl key pressed in the project structure tree and choose Compare Two Files from the context menu; or press Ctrl + D (PC) or cmd + D (Mac). The differences viewer will open with the differences highlighted:
You can move between ...
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