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 ...
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 ...
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 ...
Java 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 ...
Java Keywords
The Java programming language has 50 keywords. Each keyword has a specific meaning in the language. You can't use a keyword for anything other than its pre-assigned meaning. The following table lists Java's keywords. 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 ...
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 ...
Display Variable's value in Text in a Java Program
Java uses the concatenate operator (+) to paste two or more strings together. However, you can also use the concatenate operator to display the value of a variable with a String. Java will automatically convert the integer values to Strings for display. More ...
Java switch case Control Statement
The if else statement tells the computer to run one set of instructions based on one result of a test, and a different set of instructions based on a different result of the test. But a switch case statement can run a different set of instructions based on any value or expression provided to the switch command. 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 ...
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 ...
Java Operators
Operators are special characters used to manipulate operands. This artice explains arithmetic, relational, bitwise, logical, and assignment Operators, as well the conditional Operator and instanceof Operator. More ...
Java if else Control Statement
A computer program is a list of instructions for the computer to follow. The if else statement tells the computer to run on set of instructions based on one result of a test, and a different set of instructions on a different result of the test. 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 ...
