Display List of TimeZone with GMT and UTC in Java

Count Submatrices with All Ones in Java

Counting submatrices with all ones is a common problem in programming that involves finding the number of submatrices within a given binary matrix (containing only 0s and 1s) where every element in the submatrix is 1. The problem is widely used in image processing, data analysis...

14 min read

Generics Vs. Wildcard in Java

Fundamental Java features like generics and wildcards increase the type safety and flexibility of data structures like collections. But there is a slight difference between them. In this section we will discuss the differences between generic and wildcard in Java. What are Generics in Java? Generics are primarily...

4 min read

Differences Between Vectors and Arrays in Java

Differences Between Vector and Arrays in Java In the world of Java programming, data structures play a crucial role in storing and manipulating data efficiently. Two commonly used data structures for this purpose are vectors and arrays. While both are used to store collections of elements,...

10 min read

Java Program to Find Two Elements Whose Sum is Closest to Zero

A popular issue in computer science, "finding two elements in an array whose sum is closest to zero" is often posed in coding interviews because it may be used to assess a candidate's ability to solve problems, comprehend sorting algorithms, and use the two-pointer technique. Finding...

5 min read

Java Backward Compatibility

Java, a widely used programming language, owes much of its popularity to its commitment to backward compatibility. It means that applications written in older versions of Java can typically run on newer Java virtual machines (JVMs) without modification. In this section, we will delve into the...

4 min read

Java Program to Add two Complex Numbers

Complex numbers consist of two components - a real number and an imaginary number, which are distinct from each other. These numbers are widely used in mathematics, particularly in algebra. The standard format for a complex number is a + bi, where "a" represents the real...

4 min read

Types of Methods in Java

A method is a block of code or a collection of statements or a set of code grouped to perform a certain task or operation. It is used to achieve the reusability of code. We write a method once and use it many times. We...

12 min read

Java.util.function.DoublePredicate interface in Java with Examples

JDK 8 introduces the DoublePredicate interface. A functional interface called DoublePredicate (java.util.function.DoublePredicate) has three default methods and one abstract method specified in it. A more specialized version of the predicate interface is this particular one. Since it only has one abstract method test (double value)...

3 min read

Cosmic Superclass in Java

In Java, the Object class is the parent class of all the Java classes. Every Java class is a direct or indirect child of the Java Object class. Hence, every Java class extends the Object class. Therefore, we need not to write the following statement...

3 min read

Java.util.DoubleSummaryStatistics class with Examples

The contents of the java.util package pertains to the DoubleSummaryStatistics class. It is essential when working with a stream of large precision real numbers and requires a collection of Double objects. It keeps track of the total number of values it has processed, as well...

3 min read