Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
How to return an array from a method in Java?
We can return an array in Java from a method in Java. Here we have a method createArray() from which we create an array dynamically by taking values from the user and return the created array.Exampleimport java.util.Arrays; import java.util.Scanner; public class ReturningAnArray { public int[] createArray() { Scanner sc = new Scanner(System.in); System.out.println("Enter the size of the array that is to be created:: "); int size = sc.nextInt(); int[] myArray = new int[size]; System.out.println("Enter the elements of the array ::"); for(int i=0; i
Read MoreHow to overwrite a specific chunk in a byte array using java?
Java provides a ByteBuffer class which allows you to wrap an array into a byte buffer using its wrap() method. Once you did that you can replace the contents of the buffer using the position(): To select the starting position and, put(): To replace the data methods:Exampleimport java.nio.ByteBuffer; public class OverwriteChunkOfByteArray { public static void main(String args[]) { String str = "Hello how are you what are you doing"; byte[] byteArray = str.getBytes(); System.out.println("Contents of the byet array :: "); for(int i = 0; i
Read MoreCan i refer an element of one array from another array in java?
Yes, you can −int [] myArray1 = {23, 45, 78, 90, 10}; int [] myArray2 = {23, 45, myArray1[2], 90, 10};But, once you do so the second array stores the reference of the value, not the reference of the whole array. For this reason, any updating in the array will not affect the referred value −Exampleimport java.util.Arrays; public class RefferencingAnotherArray { public static void main(String args[]) { int [] myArray1 = {23, 45, 78, 90, 10}; int [] myArray2 = {23, 45, myArray1[2], 90, 10}; System.out.println("Contents of the 2nd ...
Read MoreHow to pull distinct values from an array in java?
To pull distinct values in an array you need to compare each element of the array to all the remaining elements, in case of a match you got your duplicate element. One solution to do so you need to use two loops (nested) where the inner loop starts with i+1 (where i is the variable of outer loop) to avoid repetitions in comparison.Exampleimport java.util.Arrays; import java.util.Scanner; public class DetectDuplcate { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.println("Enter the size of the array that is to be created::"); ...
Read MoreDifference between static, auto, global and local variable in C++
There are two separate concepts here − scope, which determines where a name can be accessed - global and local storage duration, which determines when a variable is created and destroyed - static and auto Scope Local variables can be used only by statements that are inside that function or block of code. Local variables are not known to functions on their own. Example #include using namespace std; int main () { // Local variable declaration: int a, b; int c; // actual initialization a = 10; b = 20; c = a + b; cout
Read MoreHow to switch data from an array to array list in java?
The Arrays class of the java.util package provides you a method named asList(). This method accepts an array (of objects) and converts them into a list and returns it.Exampleimport java.util.Arrays; import java.util.List; public class ArrayToList { public static void main(String args[]) { Integer[] myArray = {23, 93, 56, 92, 39}; List list = Arrays.asList(myArray); System.out.println(list); } }Output[23, 93, 56, 92, 39]
Read MoreWhat's the simplest way to print a Java array?
Generally, to print the contents of an array you need to use for loops, in addition to that you can directly print an array using the toString() method of this class. This method accepts an array as a parameter and returns it in String format.Exampleimport java.util.Arrays; public class PrintingArrays { public static void main(String args[]) { int[] myArray = {23, 93, 30, 56, 92, 39}; System.out.println(Arrays.toString(myArray)); } }Output[23, 93, 30, 56, 92, 39]
Read MoreWhat is the difference between simple name, canonical name and class name in a Java class?
Canonical name of a Java class is the name of the class along with the package. For example, the canonical name of the class File is java.io.File. You can also get the canonical name of a particular class using Java method. The class named Class provides a method getCanonicalName(), this method returns canonical name of the current class. Example import java.lang.*; public class ClassDemo { public static void main(String[] args) { ClassDemo c = new ClassDemo(); Class cls = c.getClass(); ...
Read MoreHow to declare, define and call a method in Java?
Following is the syntax to declare a method in Java. Syntax modifier return_type method_name(parameters_list){ //method body } Where, modifier − It defines the access type of the method and it is optional to use. return_type − Method may return a value. method_name − This is the method name. The method signature consists of the method name and the parameter list. parameters_list − The list of parameters, it is the type, order, and a number of parameters of a method. These are optional, method may contain zero parameters. method body − The method body defines ...
Read MoreWhat are static members of a Java class?
In Java, static members are those which belongs to the class and you can access these members without instantiating the class. The static keyword can be used with methods, fields, classes (inner/nested), blocks. Static Methods − You can create a static method by using the keyword static. Static methods can access only static fields, methods. To access static methods there is no need to instantiate the class, you can do it just using the class name as − Example public class MyClass { public static void sample(){ System.out.println("Hello"); ...
Read More