A Matrix is a rectangular array. The elements are arranged in the rows and columns. In this tutorial, we will look at some matrix programs in Java. Graphical Representation of Matrix Matrix in Java We can implement a matrix using two dimensional array in Java. The element at row “r” and column “c” can be […]
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Command Line Arguments in Java
Command-line arguments in Java are used to pass arguments to the main program. If you look at the Java main method syntax, it accepts String array as an argument. When we pass command-line arguments, they are treated as strings and passed to the main function in the string array argument. The arguments have to be […]
Finding and Checking Prime Numbers in Java
What is a Prime Number? A prime number is a natural number greater than 1 that is only divided by 1 and itself. For example, 5 is a prime number because it can be divided by only 1 and 5. Similarly, 6 is not a prime number because it can be divided by 1, 2, […]
Why Firefox and How to Get It On Your PC?
It’s hard, or even impossible, to imagine our life without the Internet. The World Wide Web lures us with its omnipresence and all-pervasiveness, which promises infinite knowledge and unlimited access to information. Still, surfing the web wouldn’t be easy and cloudless in the absence of such handy software applications as browsers. Finding one is as […]
Random Number Generator in Python
We can use Python random module to generate random numbers. We can use this module to generate random integers, floating-point numbers, or a sequence of random numbers. 1. Generating Random Integer in Python Python random module randint() function can generate a random number between the given endpoints. >>> from random import randint >>> >>> randint(1, […]
Calling C Functions from Python
We can call a C function from Python program using the ctypes module. Calling C Function from Python It involves the following steps: Creating a C file (.c extension) with the required functions Creating a shared library file (.so extension) using the C compiler. In the Python program, create a ctypes.CDLL instance from the shared […]
Gangs of Four (GoF) Design Patterns
Gangs of Four Design Patterns is the collection of 23 design patterns from the book “Design Patterns: Elements of Reusable Object-Oriented Software”. This book was first published in 1994 and it’s one of the most popular books to learn design patterns. The book was authored by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides. […]
Relational Operators in Java
Relational Operators in Java are used to comparing two variables for equality, non-equality, greater than, less than, etc. Java relational operator always returns a boolean value – true or false. Relational Operators in Java Java has 6 relational operators. == is the equality operator. This returns true if both the operands are referring to the […]
Java List removeAll(Collection) Examples
Java List removeAll() method removes all of its elements that are also present in the given list. The method throws UnsupportedOperationException if the operation is not supported by the list. If the given collection is null, NullPointerException is thrown. This method returns true if the list is changed, otherwise false. Java List removeAll() Examples Let’s […]
Java List remove() Methods – ArrayList remove()
Java List remove() method is used to remove elements from the list. ArrayList is the most widely used implementation of the List interface, so the examples here will use ArrayList remove() methods. Java List remove() Methods There are two remove() methods to remove elements from the List. E remove(int index): This method removes the element […]