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How to let users supply numeric input to your programs.

Using the Scanner Class and JOptionPane class.

What You'll Learn: This problem includes * Arrays * Loops (FOR, WHILE) * Decisions (IF) * User Input, and more! I created a ...

Using if, if else, and while statements in Java.

The video shows how to use Java to input an integer in using a loop that keeps asking for a valid input if the user inputs a negative ...

Handling a two-dimensional arrays that represent a matrix of rows and columns.

Open a text file using the Java Scanner. Read and display the contents of the file either line by line or by individual fields on each ...

ArrayLists let you store an arbitrary number of items, unlike Arrays, which have a fixed length. Here are some of the most-used ...

Some versions of C let you declare an array using a variable to give the number of elements in the array. (Sorry about the ...

Learn how to declare, initialize, and iterate through arrays.

We're going to write a program that takes an array of integers, prints it, calculates the cubes of the values, and prints those.

In this video tutorial, we'll explore the powerful Java Supplier interface and learn how it can simplify your code by generating data ...

Java Exceptions using try...throw...catch with the Electric BIll as an example. The discussion covers inputMismatchException and ...

You can use a *cast* to take an integer variable and ask Java to treat it as a double (and vice versa). This video gives you the ...

Nesting if/else statements to test multiple conditions -- and a convenient shortcut for writing such statements.

Using visual logic to work with arrays.

Now one of the things I said in the last video is this idea that map, the class of map in Java, is an abstract class. There's actually a ...

Using methods in java.

The File class lets you get information about a disk file. See this URL for information about absolute vs. relative path names: ...

A walk-through of a simple nested for loop in JavaScript, using JSTutor. Visualize it yourself at https://goo.gl/vmb3xZ.