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Quick Definition You can invoke the Quick Definition Viewer ( Ctrl Shift I ) for items in code completion lists and the class, file, or symbol navigation commands.

Scratch files Scratch files are temporary files that let you experiment and prototype in the editor, without creating any project files. To create a scratch file, press Ctrl Alt Shift Insert , and then select the language to use.

Code completion To quickly complete a method call of a static method located anywhere in your project, a library, or a JDK, enter a prefix and press Ctrl Space twice. You can press Alt Enter to import the selected method.

In IntelliJ IDEA, you can use multiple carets. Press and hold Shift Alt (on Windows and Linux) / ⇧⌥ (on macOS) and then click at different positions to set additional carets in the editor.

Drag the CSV file to create a table To add data from a CSV file, drag the file to the tables node of a data source or to the table. You can view CSV and TSV files as text or as a table.

Type-Matching code completion The type-matching code completion analyzes the expected type of the whole expression and helps to find methods and variables that are applicable in the current context. It works after the return keyword, in an assignment, in the argument list of a method call, and other places. Press Ctrl Shift Space (Code | Code Completion | Type-Matching) to get the completion lis..

Manage pull requests Manage incoming GitHub pull requests directly from IntelliJ IDEA: from the main menu select Git | GitHub | View Pull Requests. IntelliJ IDEA lets you assign and merge pull requests, view the timeline and inline comments, submit comments and reviews, and accept changes without leaving the IDE.

Breakpoints menu Right-click a breakpoint marker in the gutter to quickly enable/disable the breakpoint or adjust its properties.

Navigate to a line You can open a file in the editor at a particular line. Press Ctrl Shift N (Navigate | File), start typing the filename, and then type : followed by the line number.

Copy a path or a reference Use the Edit | Copy Path/Reference action to insert a reference to a field/method/class/file into the current position in the editor. Position the caret within the myMethod method name and press Ctrl Alt Shift C . To paste the reference, press Ctrl V . You can also copy references in the Go to Class/Go to Symbol/Go to File dialogs. Press Ctrl C on any element in the lo..

Verify regular expressions To verify that your regular expression is correct, place the caret within the expression you want to check, press Alt Enter , and select Check RegExp. In the popup, type a sample string that should match your regular expression. The icon shows that the match occurred.

View inheritance hierarchy To see the inheritance hierarchy for the selected class, press Ctrl H (Navigate | Type Hierarchy). You can also invoke the hierarchy view directly from the editor to see the hierarchy for the currently edited class.