The Extract Field refactoring lets you declare a new field and initialize it with the selected expression. The original expression is replaced with the usage of the field.
Place the cursor within a piece of code you want to extract into a field.
Press Ctrl+Alt+F or on the main menu, select.
Select an expression you want introduce as a field. If IntelliJ IDEA detects more than one occurrence in your code, it lets you specify which occurrences to replace. You can press Ctrl+Alt+F twice to open the Extract Field dialog where you can specify additional details, such as visibility options, or options for initializing your variable.
Let's extract the
anotherClass.intValue(); variable into a field. As a result, IntelliJ IDEA changes the selected variable name to
number and declares it as the
private int number field.