Passing Arguments to a Java Application
In this article I use a very short example program to demonstrate several basic principles of Java programming; how to pass arguments to a Java application, how to convert a string to an int, and how to use an if structure. More ...
How to Create the Most Basic Java Window
A lot of Java programming involves creating command line applications. But I like to get to opening a graphic window as quickly as possible. This is no problem because it's actually very easy to create a basic JFrame window. More ...
Java Byte, Short, Long, and Double Variable Types
In Java, as in other programming languages, information that can be changed as the program runs is stored in variables. A primitive variable type is predefined by the language and is named by a reserved keyword. There are eight primitive data types supported by the Java programming language. More ...
Getting Started as a Java Programmer
One of the reasons for Java's rapid growth is that Sun Microsystems has always makes the Java Software Development Kit (SDK) available at its Web site for free. All you need to develop Java programs is the SDK and a basic ASCII text editor like Windows Notepad. More ...
Reading Files with Java
Without the ability to read files, your application would be severely limited. In this article I show you; how to use the JfileChooser dialog box to select a file, how to display the contents of the file in your applications window, and how to scroll the Window. More ...
Java do-while Loop
A loop is a block of statements that are repeated. There are three main loop control structures available in Java: for, do and while. This article provides example of while loop code. More ...
How to Use Boolean Expressions in Java
A Java boolean can have one of two values: true or false. In some languages, such as C or C++, integer values can be treated as a boolean, with 0 equal to false and any other value equal to true. Not so in Java. In Java, you can't convert between an integer type and a boolean type. More ...
Change the Case of Text in a Java Program
If you compare two characters or two strings, Java will say they are different if all the characters are not the same case. To make a comparison without consideration for case, you can first convert all the characters in a string to lower case using the String objects toLowerCase toUpperCase method. More ...
Concatenate Strings in a Java Program
Java uses the concatenate (+) operator to paste two or more strings together. This article provides Java code to concatenate the strings "first text " and "second text". More ...
Basic Java Variables
In Java information that can be changed as the program runs is stored in variables. A variable is created with a statement that has the type and the name of the variable, and sometimes the value of the information being stored. More ...
Determine the Length of a Text String in a Java Program
Java uses the .length method to return the length, in characters, of the text contained in a String object. In this article is the Java code to determine the length of a text string. More ...
Locate Text Within Text in a Java Program
In Java a letter or digit is called a character and a collection of letters or digits that make a phrase, sentence, or paragraph, is called a string. Java uses the String object's .indexOf method to locate one string within another. More ...
Introduction to Java - A Brief Overview
Java is a broadly useful programming language with various components that make the language appropriate for use on the World Wide Web. There are more than nine million Java programmers and more than three billion cellphones run it. More ...
Java for Loop
A loop is a block of statements that are repeated. A loop may be repeated a fixed number of times, repeat until some condition is met, or can loop indefinitely while the program is running. There are three main loop control structures available in Java: for, do and while. More ...
