Java is a high-level, class-based, object-oriented programming language. James Gosling at Sun Microsystems (now part of Oracle Corporation) designed it, and it was released in 1995. The language was ...

This Java tutorial teaches you how to declare classes, describe attributes via fields, describe behaviors via methods, initialize objects via constructors, and instantiate objects from classes and ...

How to initialize a Java class Before we explore Java’s support for class initialization, let’s recap the steps of initializing a Java class. Consider Listing 1. Listing 1.

Java's default constructor allows developers to create instances of classes when no other constructors are explicitly defined. The default constructor in Java takes no arguments -- it simply ...

If you find incomplete initialization, you should fix the startup code (e.g., to clear the .bss section) instead of modifying the source code to explicitly initialize variables. Explicit ...

How to find the size of a Java array? To find the size or length of a Java array, follow these four steps Declare a variable of type array. Initialize the Java array to a non-null value. Use the ...

Null pointer exception is an “exception” (error) that is particularly common when programming in Java. For a beginner, this is a confusing and daunting message to receive, but it can be just ...