Learning Java using JShell

We are doing some simple math.

First commands in JShell.

Introduction to variables.

Variables practically used.

Defining and using variables with text and logical values including the use of their operators.

The compound assignment operators save you some typing.

Only one input variable.

See compound and unary operators in action.

It's time for a small break and a summary of what we have learned.

Using flow charts to demonstrate the If-Statement.

We have If-Statements within JShell.

An If-Statement as an operator.

Let's compute a maximum with the ternary operator.

Description of the Switch-Statement and some words about the Break-Statement.

Always use break;

The While-Loop and the Do-While-Loop as flow chart and code and their differences.

The While-Loop with curly braces and without.

The Do-While-Loop with curly braces and without and the differences to the While-Loop.

What are Arrays?

There are two ways to define an array.

Writing to and reading from an array. The bounds of an array and the error messages you get.

Arrays in Arrays

Practical examples of arrays.

How the For-loop looks like in code and in a flow chart diagram.

Why programmers use the For-loop so often.

How to use the For-Loop together with an array or an iterator.

A relative to the For-Loop.

Diving into more features of the For-Loop

Have a look at an example of the For-Loop and the For-Each-Loop in JShell.

Basics about methods. How a method is declared and how it is invoked.

Let's create some methods and use them using JShell.

Normally there is a fixed number of parameters to a method. But it is possible to provide a variable number of parameters.