8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

1. Control + Shift + O: Import

If you’re going to use ArrayList, LinkedList or any other such data structure class from the Java Collections Framework, you will need the following lines above your class declaration and constructor.
import java.awt.List;
import java.util.ArrayList;

public class Hello {
  public static void main(String[] args) {
    System.out.println("Hello World!");
  }
}
Instead of having to type the import lines, you could just write your code first in the editor and whenever you see red squiggly lines signaling that you need to import a specific class, all you have to do is press Ctrl + Shift + O and ALL the unknown types will be imported. No more going into the focus popup and pressing Import for each class.

2. Control + I: Indent

Is your code looking like this at times?
eclipse shortcuts indent   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

Simply highlight the code portion that looks hard to read, press Ctrl + i to indent everything nicely.
eclipse shortcuts indent2   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

3. Control + D: Delete Line

If you need to delete a line, you might usually highlight the entire line with your mouse (or with the Home or End buttons) and delete the new line character every time. Try Ctrl + D for quick whole-line deletion. It will be like the line was never even there, no final new line character touchups necessary.
eclipse shortcut delete   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

4. Control + Space: Auto-Complete Variable Or Function Name

If you have declared and initialized at least one variable or even function or method, you can type the first few letters of the variable or function name, hit Ctrl + Space to auto-complete it. This will work well if you have very unique variable or function names, because otherwise, you’ll have to choose among the distinct names in a focus popup window.
eclipse shortcut autocomplete   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

5. sysout + Control + Space: Puts System.out.println()

If you ever need to type out a print statement, in particular, “System.out.println()”, there’s a shortcut for this: Simply type out the word “sysout” and then hit Ctrl + Space.
eclipse shortcuts sysout   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

6. Control + H: Search Your Entire Project

When you’re working on projects with numerous classes that rely on each other, sometimes you might forget where it was you declared a specific function or variable. If that’s the case,Ctrl + h will come in handy as it lets you search through not just the class you’re working on, but the entire project folder.
eclipse shortcuts search   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

7. Control + F11: Run

If you’re constantly pressing on Run As > Java Application, you can instead press on Ctrl + F11 to run your program.
eclipse shortcuts run   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

8. Alt + Shift + R: Rename

When you want to rename a variable or a function, you don’t have to re-type every single instance of the old variable or function name, nor do you have to right-click on the name and select Refactor > Rename when you can simply press Alt + Shift + R to rename ALL the instances.
eclipse shortcuts rename   8 Most Useful Keyboard Shortcuts For Beginner Eclipse IDE Users

What other handy tips do you have for beginners? Let us know in the comments below!

Reference : Jessica Cam Wong