Reference datatypes in java are those which contains reference/address of dynamically created objects. These are not predefined like primitive data types. Following are the reference types in Java. class types − This reference type points to an object of a class. array types − This reference type points to an array. interface types − This reference type points to an object of a class which implements an interface. Once we create a variable of these types (i.e. when we create an array or object, class or interface). These variables only store the address of these values. Default ... Read More

Reference datatypes in java are those which contains reference/address of dynamically created objects. These are not predefined like primitive data types. Following are the reference types in Java. class types − This reference type points to an object of a class. array types − This reference type points to an array. interface types − This reference type points to an object of a class which implements an interface. Once we create a variable of these types (i.e. when we create an array or object, class or interface). These variables only store the address of these values. Default ... Read More

When we are working with string data in Python, it's sometimed necessary to check if certain patterns appear in a string. Python's re module contains many methods which are used for pattern matching in the given strings using regular expressions. What is match() function? The match() function in re module is used in the scenarios such as validating structured input, checking prefixes or extracting information from well-defined formats such as phone numbers or dates. Syntax Following is the syntax of using the match() function in Python - re.match(pattern, string, flags=0) Where, pattern: The regular ... Read More

Whenever we try to sort elements with null values using the sort method it throws an exception.The sort() method of the Arrays class also accepts a Comparator along with the array. Using comparator, you need to specify the order in which the elements need to be sorted.Using this method push all the null elements to last and sort the elements −Example Live Demoimport java.util.Arrays; import java.util.Comparator; public class ArrayWithNullsInOrder { public static void main(String args[]) { String[] myArray = {"JavaFX", null, "OpenCV", null, "Hadoop", null}; Arrays.sort(myArray, Comparator.nullsLast(String.CASE_INSENSITIVE_ORDER)); System.out.println(Arrays.toString(myArray)); } }Output[Hadoop, JavaFX, OpenCV, null, null, null]Read More

To sort a String array in Java, you need to compare each element of the array to all the remaining elements, if the result is greater than 0, swap them.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.ExampleLive Demoimport java.util.Arrays; public class StringArrayInOrder {    public static void main(String args[]) {       String[] myArray = {"JavaFX", "HBase", "OpenCV", "Java", "Hadoop", "Neo4j"};       int size = myArray.length;       for(int i = 0; i

To sort an array in Java, you need to compare each element of the array to all the remaining elements and verify whether it is greater if so swap them.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 ArrayInOrder {    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 More

To sort an array in Java, you need to compare each element of the array to all the remaining elements and verify whether it is greater if so swap them.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.Example Live Demoimport java.util.Arrays; import java.util.Scanner; public class ArrayInOrder {    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 More

You can convert a double array to a string using the toString() method. To convert a double array to a string array, convert each element of it to string and populate the String array with them.ExampleLive Demoimport java.util.Arrays; public class DoubleArrayToString {    public static void main(String args[]) {       Double[] arr = {12.4, 35.2, 25.6, 98.7, 56.4};       int size = arr.length;       String[] str = new String[size];           for(int i=0; i

You can convert a String to an integer using the parseInt() method of the Integer class. To convert a string array to an integer array, convert each element of it to integer and populate the integer array with them.Example Live Demoimport java.util.Arrays; public class StringToIntegerArray {    public static void main(String args[]) {       String [] str = {"123", "345", "437", "894"};       int size = str.length;       int [] arr = new int [size];       for(int i=0; i

You can convert a String to integer using the parseInt() method of the Integer class. To convert a string array to an integer array, convert each element of it to integer and populate the integer array with them.Example Live Demoimport java.util.Arrays; public class StringToIntegerArray { public static void main(String args[]) { String [] str = {"123", "345", "437", "894"}; int size = str.length; int [] arr = new int [size]; for(int i=0; i