(Code | Surround With) You can customize the bodies of the generated catch blocks on the Code tab of File | Settings | File and Code Templates.
Autocomplete
⌃Space
traditional autocompletion and name suggestion
⌃⇧Space
SmartType
⇥
accept the suggestion
⌘P
a list of valid parameters
Shift+click
close tabs in the editor
⌘N
(Code | Generate)
⌃⇧Space
new
⌥⌘V
simplify complicated statements in your code
Class Navi
⇧⌘⌫
last modified place
⌃H
inheritance hierarchy for a selected class
⌥F7
all places where a particular class, method or variable is used in the whole project by positioning the caret at the symbol's name or at its usage in code and pressing ⌥F7 (Edit | Find | Find Usages in the popup menu).
F1
See javadoc
⇧F1
browser view doc
⌥F1
To quickly select the currently edited element (class, file, method or field) in any view (Project view, Structure view or other)
⌥↑
(extend selection) in the editor selects the word at the caret and then selects expanding areas of the source code. For example, it may select a method name, then the expression that calls this method, then the whole statement, then the containing block, etc. You can also select the word at the caret and the expanding areas of the source code by double-clicking the target areas in the editor.
⌘B
To navigate to the declaration of a class, method or variable used somewhere in the code, position the caret at the usage and press ⌘B (Navigate | Declaration). You can also click the mouse on usages with the Ctrl key pressed to jump to declarations.
⌥⌘B
To navigate to the implementation(s) of an abstract method
⌃⇧Q
to see the declaration of the current method without the need to scroll to it.
window
The ⎋ key in any tool window moves the focus to the editor.
⇧⎋ moves the focus to the editor and also hides the current (or last active) tool window.
The F12 key moves the focus from the editor to the last focused tool window.
Debug
To easily evaluate the value of any expression while debugging the program, select its text in the editor (you may press a ⌥↑ a few times to efficiently perform this operation) and press ⌥F8.
To quickly evaluate the value of any expression while debugging the program, hold Alt and click this expression to see its value and calculate it, call a method, etc.
Start
https://www.jetbrains.com/idea/documentation/
Find&Search
⌘Osearch for class⇧⌘Osearch for file⌥⌘Oanything in file⌘F12struture in file⌘Erecent filesF2/⇧F2syntac error jump⌥⌘↑/⌥⌘↓compiler error jump⇧⌘F7(Edit | Find | Highlight Usages in File) to quickly highlight usages of some variable in the current file.⌘Gand⇧⌘Gkeys to navigate through highlighted usages.⎋to remove highlighting.Movement
⌃↑and⌃↓keys to quickly move between methods in the editor.Edit
⇧⌘VCode | Reformat Code⌃⇧J⇧F6(Refactor | Rename)⌃O(Override)⌃I(Implement)Comment
⌘/and⌥⌘/⇧⌘⏎⌥⌘T⌃Space⌃⇧Space⇥⌘PShift+click⌘N⌃⇧Space⌥⌘V⇧⌘⌫⌃H⌥F7F1⇧F1⌥F1⌥↑⌘B⌥⌘B⌃⇧QThe ⎋ key in any tool window moves the focus to the editor. ⇧⎋ moves the focus to the editor and also hides the current (or last active) tool window. The F12 key moves the focus from the editor to the last focused tool window.
Debug
To easily evaluate the value of any expression while debugging the program, select its text in the editor (you may press a ⌥↑ a few times to efficiently perform this operation) and press ⌥F8.
To quickly evaluate the value of any expression while debugging the program, hold Alt and click this expression to see its value and calculate it, call a method, etc.
Function to Try
⌘Jcompetion)