Many times, in any programming language, sorting of data either in a DS or an array is required. In C/C++, it requires good logic and lengthy code of iterations. In many places in this Web site, I said Java is simple to practice avoiding lot of lines of code. This tutorial on Sort int Array …
An array in Java can be created either with any data type or with any object like Student objects, Employee objects, Integer, Date etc. Following example on Array of Objects creates Student array and Integer array. class Student { int marks; } public class ArrayOfObjects { public static void main(String args[]) { Student std[] = …
Java Syntax is easier to develop code and thus makes Java is the most wanted language in the world. Java allures the Programmers with its simplicity(ease in coding) in learning and programming. The main reason is it does not support pointers. Migrators from C/C++ feel as if floating in the air two feet above the …
Java is an OOPs language that can be learnt and practiced easily. The laborious code of C/C++ involving lot of control structure iterations simple forget in Java. Java comes with many predefined methods which make coding simple and fast. For this reason Java is known as "Production Language". To achieve this goal, Java came with …
Before going into JAR Java details, let us observe the drawbacks of zip file. You create zip file on Windows platform and the question is can you unzip on a different platform like Linux. No, not possible. Zipping algorithms are platform-dependent. That is, the zip file (.zip extension) you created on Windows should be unzipped …
Java Language – Introduction Like C++ and Smalltalk, Java Language is object-oriented with a good support of standard class libraries, known as Java API (Application Programming Interface). Java API supports graphics, graphical user interface (GUI), mathematical and threaded operations, applets and applications etc. With its rich API, architecture neutral support and Java Virtual Machine, Java …
For a new learner of Java, it does not make any difference between int vs integer. He uses both just to refer a data type int. But he gets surprised once he comes to know there is a class called Integer in Java placed in java.lang package. Some people argue that Java is not a …
Array of Arrays: It is not new to a C/C++ programmer about array of arrays. He knows well that a 2D array is nothing but array of one-dimensional arrays. Of course, Java also means the same. 2D arrays are clearly discussed in: Two-Dimensional Arrays (Array of Arrays) Anyhow, as another example on Array of Arrays, …
Java Arrays class: Here comes a confusion for a new Java learner with array, arrays and Arrays. He uses all interchangeably, meaning the same. He uses anyone just to refer arrays of Java. He thinks array and arrays are singular and plural. Of course, he is right. Problem comes once he knows there is a …
Apart char and string arrays, the most commonly used array is int Array in coding. Following code on int Array shows the initialization and declaration of an integer array and printing its elements. public class IntArray { public static void main(String args[]) { int marks[] = {40, 50, 60, 70, 80}; // int Array initialization …
Two arrays are mostly used in programming – String array and Char array. Following program shows the initialization of a character array and also shows how to create an empty array. Example on Char Array public class CharArray { public static void main(String args[]) { char vowels[] = {‘a’, ‘e’, ‘i’, ‘o’, ‘u’}; // initializing …
Concatenate Arrays is very practical in real time environment. It is easy to copy one array into another, or clubbing both array elements. To make programming easy, the designers included arraycopy() static method in System class. Concatenate Arrays: Following code concatenates two string arrays in three ways. Java comes with still many more ways using …
Set Iterator Java Example – Explanation – Screenshot Iteration is nothing but repeating the same operation multiple times. For this, every language, including Java, gives a control structure for loop. Especially for iterating the Data Structure elements, Java comes with three special loops given by three interfaces – Enumeration, Iterator and ListIterator. All the three …
Iterator Java Example – Explanation – Screenshot Iteration is nothing but repeating the same operation multiple times. For this, every language, including Java, gives a control structure for loop. Especially for iterating the data structure elements, Java gives three special loops – Enumeration, Iterator and ListIterator. All the three are meant to iterate only; but …
String Java: In every language strings and string manipulations are inevitable. knowing the importance of string operations, Designers of Java introduced two classes to manipulate strings- String and StringBuffer. In C/C++, string is an array of characters with a terminating /0. But in Java, it is very different. String is given the status of a …
Sometimes, it is necessary to convert an array of bytes and characters into a string in Java coding. Conversion of array to string is easy in Java, just use String constructors. Following Example on array to String converts char array and byte array into string form. public class Demo { public static void main(String args[]) …
There is no straight way to reverse a string in Java. reverse() method is not included in String class as String is immutable. We use reverse() method of StringBuffer class to reverse a string. In the following code, string palindrome is checked with string reverse. public class Demo { public static void main(String args[]) { …
To find the String Length, the String class comes with length() method returning the number of characters as an int. Following program on String Length illustrates. public class Demo { public static void main(String args[]) { String str1 = “hello”; String str2 = “”; int x = str1.length(); System.out.println(x); System.out.println(“hello length: ” + str1.length()); System.out.println(“Empty …
In C/C++, string is an array of characters with a terminating /0. But in Java, the scenario is completely different. In Java, string exists as a class String from java.lang package. To make string manipulation easy, Designers introduced many methods in String class with different functionality. Of them two are given substring() and contains() in …
String class is a boon to Java programmers given by the designers. Lot of trouble you have taken with volumes of code in C/C++, just forget in Java. Good example is Compare Strings in Java. Everywhere, in every language, strings comparison is required at every stage. To compare strings, there are two styles – using …
