JAVA EXAMPLE PROGRAMS

Java Multi-Dimensional Arrays

Multi dimensional arrays are arrays of arrays. To declare a multi dimensional array variable, specify each additional index using another set of square brackets. An example is given below for two dimensional array:

int sample[][] = new int[3][3];

We can specify memory for first dimension first, and we can assign memory for second dimension later as given below:

int sample[][] = new int[3][];
int sample[0] = new int[2];
int sample[1] = new int[2];
int sample[2] = new int[2];

The advantage of assigning memory for second dimension is your second dimension can be of any lengths, cannot be fixed length.

Other Java Array Examples

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Class, Constructor and Primitive data types

Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.

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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.