I don't like Eclipse because it doesn't do the stuff that a basic IDE is suppose to do either at all or very well. Perhaps you have noticed that when you type in Intellij, it actually makes good suggestions and auto completes properly.
A general tip to find features like this: Press Ctrl+3 (Cmd+3 on Mac OS X) or type in the "quick access" search bar in newer Eclipse versions. It shows the command and the shortcut. Also useful for toggling "Show Whitespace Characters" without needing to have the button in the toolbar, jumping to a preference page, etc.