Arrays in Java

Removing Duplicates Array Java

Removing Duplicates Array Java Summary: Java is so developed by Designers to write code easily for Developers. Forget the laborious days of C/C++ coding. This tutorial "Removing Duplicates Array Java" is the place to prove it. It is a general and interesting code for beginners and this can be achieved…

Precaution length vs length() vs size() Java

length vs length() vs size(): All the three length, length() and size() give the number of elements present but in different contexts. A) length variable: In Java, array (not java.util.Array) is a predefined class in the language itself. To find the elements of an array, designers used length variable (length…

Java Arrays

Arrays play very important role in a programming language. Java also supports arrays. Array manipulation is easy like array copying. Java 2 adds a new class called java.util.Arrays for array elements manipulation. Following gives all the operations, you expect that are necessary for arrays. 1. Arrays Introduction & Properties 2.…

Confusion of reference variables vs objects in arrays

Precaution in using reference variables vs objects in array creation Note: If you are new to reference variables, read Reference Variables Anonymous objects before reading this. Reference variables vs Objects is very confusing while creating array objects as an array. Observe the following code.

Demo d[] = new Demo[2];…

Java Convert Array to ArrayList

Java Convert Array ArrayList Summary: It is quiet common in Java coding to convert array to array list and vice versa. 4 styles are given in simple terms, examples in this tutorial "Java Convert Array ArrayList". Following are the methods signature used Java Convert Array ArrayList. 1. Defined in Array…

Java ArrayList to Array

Java ArrayList to Array Summary: After seeing the 4 styles of converting array elements into array list, now let us do the opposite way of converting "Java ArrayList to Array". Note: There are two methods, asList() and toArray(), that bridges collection classes (data structures) and array. These methods are defined…

Java Array vs ArrayList

Java Array vs ArrayList Summary: This tutorial "Java Array vs ArrayList", tables you the differences between array and arraylist at a glance to remember easily. Both array and ArrayList are well familiar and used by the programmer very often. Both are interoperable – array to arraylist and arraylist to array.…

All Array Operations at a Glance

All Array Operations at a Glance 1. Arrays Introduction & Properties 2. One-Dimensional Arrays 3. Two-Dimensional Arrays (Array of Arrays) 4. Java Array Copying 5. Command-line Arguments 6. Jagged Arrays – Varying Column Size Arrays 7. Converting Numbers to Words 8. String Array & Object String Array 9. Byte Array…

Java Join concat Arrays

Java Join concat Arrays Summary: By the end of this tutorial Java "Join concat Arrays", you will be comfortable to concatenate two Java arrays. Explained in simple terms, example code and screenshot for a Beginner. There is no direct method in Java to join arrays (but there is a method…

Pass Arrays Constructor Java

Pass Arrays Constructor: Sometimes, it is required to pass arrays to methods and constructors to transfer large amount of data between methods. Following is the example on Pass Arrays Constructor

A teachers string array object is initialized and passed to Publisher constructor.

Now, Publisher constructor receives teachers…

Java Passing Arrays to Methods

Java Passing Arrays to Methods Summary: It is allowed to pass arrays to methods like any other objects. Explained in simple terms in this tutorial "Java Passing Arrays to Methods". Here, pass-by-reference is also shown in Java style. Sometimes, it is required to pass arrays to method parameters to transfer…

Create Array Objects

Create Array Objects Summary: Here in this tutorial "Create Array Objects", learn creating an array objects and using them with Java syntax. Sometimes it is required to create a number of objects for our class in the coding. Creating one by one is laborious. Alternatively, we can go for an…

Static String Static String Array

Static String Static String Array Summary: By the end of this tutorial "Static String Static String Array", you will come to know creation of static string and static string array. Like static variables, static strings and static string arrays are also common in Java coding. The same rules of static…

Char array Byte array to String

Very often, as code demands, the array elements may be required to convert into string, especially, char arrays and byte arrays. For conversion, the string constructors and methods like copyValueOf() method is used. Following program illustrates the Char array Byte array to String.

Output screen of StringArrayManipulations.java of Char…

String Array Object String Array

String Array Object String Array Summary: By the end of this tutorial "String Array Object String Array", you will come to know how to create string array and converting object array to string array. String arrays play very important role in any language coding. In the following program, string arrays…

Converting Numbers to Words

Sometimes it is very much required in coding to convert numbers to words and print them as can be seen in Railway reservation tickets. Explained in "Converting Numbers to Words" with Java syntax. Following program illustrates "Converting Numbers to Words".

The integer number is taken from keyboard, converted and…

Java Convert Byte Array Char Array

Java Convert Byte Array Char Array Summary: Explained in this tutorial "Java Convert Byte Array Char Array", converting in between byte array and char array in simple Java code. Sometimes it is very much required to convert byte array to char array and vice versa in coding. Following program illustrates…

Arrays Introduction Tutorial Properties

Arrays Introduction Tutorial Properties Summary: This tutorial "Arrays Introduction Tutorial Properties", discusses arrays properties in simple terms, example code and screenshots. Start reading. Array is a data structure capable to hold data of similar data types. Every language comes with its own rules for arrays. For example, JavaScript and VBScript…

Java Array Copying arraycopy

Java Array Copying arraycopy method Summary: Java is simple to practice and one example is arraycopy() method. Illustrated in this tutorial "Java Array Copying arraycopy". Java makes it easier to copy array elements into another either totally or a few. To copy, the System class includes arraycopy() method whose signature…