In Java, a string is also an object. It is the object of the String class. A String is a sequence of characters. The last index of a particular word in a string is nothing but the position of the last occurrence of that word in the string. The index of a character in a string defines or tells the position in the string. The position or Index always starts from 0. In this section, we are going to discuss how to implement a Java program to find the last index of a particular word in a string. Strings are ... Read More

Here, we will demonstrate the usage of static inner class using the Java program. Before diving deep into the topic, let us get acquainted with the term Static Inner Class . Static Inner Class An inner class is the one, which is defined within another class. A Static Inner Class is a nested class that is a static member of the outer class. Other static members can be used to access it without first instantiating the outer class. A static nested class lacks access to the instance variables and methods of the outer class, much like static member’s java. Example ... Read More

We will demonstrate how total marks and percentages are calculated using Java programs. The term total marks refer to the summation of all the available marks, while the term percentage refers to the number obtained by dividing the calculated marks by total marks and multiplying the resultant by 100. percentage_of_marks = (obtained_marks/total_marks) × 100 Problem Statement Given a Java program to calculate the total marks and percentage of a student in a given set of subject. Input marks = { 69, 88, 77, 89, 98, 100, 57, 78 } Output Total Marks is: 656 Total Percentage is: ... Read More

Here, the usage of Hexadecimal shall be demonstrated through the Java Program. Let us get acquainted with the term Hexadecimal before seeing a Java program. The Hexadecimal is a type of number system that has a base value of 16. There are 16 symbols representing hexadecimal numbers. These symbols or values are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. Each digit represents a decimal value.  The hexadecimal numbers from 0 to 9 are equivalent to decimal numbers from 0 to 9. Further, A represents 10, B represents 11, C represents ... Read More

Here, we will demonstrate the availability of the default constructor of the super class to the sub class by default through Java Program. Before diving deep into the topic, let us get acquainted with the term Constructor, Super class, and subclass. Constructor A special method in Java is considered for the initialization of an object. The name of the constructor is the same as the class name and it does not return anything. A default constructor is invoked by itself whenever an object is created using a new keyword. There are following three types of constructors in Java ... Read More

The special characters, also known as metacharacters, in Java Regex holds a specific meaning within the regex syntax and must be escaped if you want to use them as regular characters. Here, we will demonstrate escaping characters in Regex through Java Program. But, before diving deep into the topic, let us get familiar with the term Regex in Java. What is Regex? It is an acronym for a Regular expression. It is an API that offers users to define String patterns that are useful for finding, modifying, and editing strings. A couple of areas of strings where Regex is ... Read More

A Hashtable is a powerful data structure in Java that allows programmers to store and organise data in key-value pairs. Many applications need retrieving and displaying entries from a Hashtable. In a Hashtable, any non-null object can serve as a key or a value. However, for successful storage and retrieval of items from the Hashtable, the objects used as keys must implement both the equals() method and the hashCode() method. These implementations ensure proper handling of key comparisons and hashing, enabling efficient management and retrieval of data within the Hashtable. Through the utilization of the keys() and elements() ... Read More

The ability to interact with databases is an important requirement for many software programs in this data-driven world. Java is a versatile and robust programming language that offers Java Database Connectivity (JDBC), an effective mechanism that enables smooth interaction with different database systems. JDBC is an API that offers a standardised interface for Java applications to communicate with databases. We can perform operations like querying, inserting, updating, and deleting data using it as a bridge between the Java application and the database. This article helps us to delve into the world of Java's JDBC API, enabling us ... Read More

We all are well aware are that now-a-days various coding platforms include competitive codings, for example GeeksforGeeks, CodeChef, Codeforces, atCoder, SPOJ, HackerRank, HackerEarth, and many more where they supposed to code out by themselves by either attaching local editor file such as a sublime editor or by directly writing on their respective editors. So how are these test cases getting accessed or in an easy way we can say that our code is getting compiled and run? On these programming platforms for competitive programming online judges act as the backbone for code compilation and run. Online Judge To judge ... Read More

The execution of instructions in programming languages involves the operation of various symbols referred to as "operators." Operators tell computers what action/value evaluation should be performed throughout set codes. Arithmetic-based operates consist of performing essential calculations like addition/subtraction/multiplication/division. Played out with relational-oriented operates that indicate interactions between any two values and analyzes when one is greater/equal/less with regards to another value - showing its relevance under certain conditions. Logical-operates' primary role often includes merging diverse quality statements into significant arguments either as True/False statement criteria based on developers' intentions efficiently using all three indispensable operator types. Left Shift Operator in ... Read More