So, if smart completion is disabled, the shortcut command is Ctrl+Shift+Space to turn it on.

By default, the IDE already displays the completion pop-up automatically while you type. Now, while the basic completion can practically give you everything, the smart type-matching completion only gives you suggestions that are relevant to the current context. Smart type-matching completion and programming languages Meanwhile, pressing the command three times will expand the suggestion list of the basic code completion to all classes in the project. Pressing Ctrl+Space twice will show inaccessible members, classes, and static fields and methods. The basic code completion appears when you press Ctrl+Space, then it suggests a list of possible names when applied to a part of a field, variable declaration, or parameter. The code completion feature has two types of suggestion lists: Basic completion and smart type-matching completion. It can help you quickly fill a field, access a tool window, set toggles, easily search through a list of numerous elements, and a whole lot more. Aside from that, the IDE also predicts what you need and allows you to automate repetitive development tasks. This basically means that the program can suggest classes, methods, fields, and keywords that are expected in the current code you’re trying to create.

IntelliJ IDEA has a lot of features, but its most popular key feature is its smart code completion capability.

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