How does code completion in IntelliJ IDEA differ from NetBeans?
In IntelliJ IDEA you have three types of completion, that work differently so that you can always pick what’s best for the code you’re working with. For example, when you just need to quickly complete an obvious statement, you can press Ctrl+Space and it’s done. It’s called Basic Completion. It also comes in handy when you want to look at the complete list of available choices in the current context, or need to complete a keyword. If you need more precision and don’t want to scroll through an endless list of selections, use Ctrl+Shift+Space to narrow the selection down by the expression type. Smart Completion that is invoked this way will filter the list for you, letting you get what you need quicker. Moreover, if you press it once again it will even show you the symbols that can be reached through a chained method call. Finally, the Class Names Completion (Ctrl+Alt+Space) lets you quickly complete a class name, and insert an import statement if it’s not referenced yet.
