Eclipse Tutorial

Eclipse tutorial

Opening a new project

Select Java project

Project name

Choose compiler version Separating source from output

Opening a class object

In this case the project file will be in ~/.eclipse/Example Class name Inheritance definition Choosing Interface Choosing functions to add Add javadoc Yes/No

This is the result

Select a method from the menu

And the cursor “jumps” to the method’s position

Put the cursor on the method’s name, press Alt+Shift+j and we generate javadoc

Here we try to put an int in a String object. On the sidebar we have a red X and a lamp, which means Eclipse has a solution for us

Red X means code with an error

After pressing Ctrl+s we get the list of errors in the problems tab

Eclipse offers us completions for the subclass methods

We can also ask Eclipse to complete strings for us. Write the prefix, press alt+I,

And that is what you get

Parameter hints: pressing Ctrl+Alt+spacebar, gives the possible method parameters

In case of a mistake, press Ctrl+1 to get possible corrections

Choose a name to the variable, and replace all of it’s occurrences

If we want to make a variable from a constant, mark it and press Alt+Shift+l

And that is what you get

Choose name, properties, and generate javadoc

The same with methods. Mark the relevent lines in the code, press Alt+Shift+m

And this is what you get

Choose extract interface from class

Choose a name for the interface

Choose functions for the interface

Writing a new class

Now you need to add getters and setters…

Choose generate getters and setters

Choose relevent data members

Choose the rest of the properties

And this is what you get

In order to complete a for loop, put the cursor on the edge of the word “for”, and press Ctrl+spacebar

Before running the program, we need to define the run

Choose name

Choose project Choose the class with the main() method

Left click twice on a line in the code sets a breakpoint.

Pressing Ctrl+F11 runs the program

In order to run in a state where the program stops at breakpoints, we press only F11

We see the run details in the debug window

After halting, there are several options:. F5 Step Into execute the next line in the code. If it is a method, execute the first code line in the method. F6 Step Over – execute the next line in the code. If it is a method, execute the method.

F8: resume run until next breakpoint Terminate

In order to watch a variable value, press Ctrl+alt+i