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Articles on Trending Technologies
Technical articles with clear explanations and examples
Is it possible to create a class without a name in Java?
Yes, we can create a class without a name in Java using the anonymous class. It is a type of inner class which does not have a name and whose instance is created at the time of the creation of the class itself. You can create this class in a single statement using the new keyword. Creating multiple instances of this class is not allowed. You can use anonymous classes in case where you need to override methods of a class or an interface for a one-time use, and you don't want to create a separate named class for it. ...
Read MoreWhy String class is immutable or final in Java?
The general meaning of immutable is something that cannot be changed or modified after creation. In Java, a string is immutable; we cannot change the object itself, but we can change the reference to the object. The string is made final to not allow others to extend and modify it. When you modify a string, a new copy of the string with your modifications is created. This article will explain what a String is and why it is immutable and final in Java. What is a String? Like other object-oriented programming languages, almost every component of Java is an object, ...
Read MoreC++ Program to Access Elements of an Array Using Pointer
In this article, we'll show you how to write a C++ program to access elements of an array using pointer. A pointer is a variable that holds the memory address of another variable, allowing us to reference it directly. In other words, pointers point to a memory location and obtaining the value stored at that location is called dereferencing the pointer. By using pointers, we can access and work with array elements through their memory addresses. Let's look at a simple example: Input: An array: [10, 20, 30, 40, 50] // We'll use a pointer to access ...
Read MoreC++ program to Reverse a Sentence Using Recursion
In this article, we will write a C++ program to reverse a sentence using recursion. Reversing a sentence means changing the order of all its characters in each word, so the first character moves to the end, the last character comes to the front, and the middle characters follow in the opposite order. Let's understand this with an example: // Example 1 Input: Welcome to tutorialspoint! // After reversing the sentence Output: !tniopslairotut ot emocleW // Example 2 Input: Learning C++ with tutorialspoint is fun // After reversing the sentence Output: nuf si tniopslairotut htiw ++C gninraeL ...
Read MoreC++ Program to Display Armstrong Number Between Two Intervals
In this article, we will understand how to display all the prime numbers from 1 to N in Java. All possible positive numbers from 1 to infinity are called natural numbers. A number is a prime number if its only factors are 1 and itself and cannot be divided by any other number. 11 is a prime number. Its factors are 1 and 11 itself. Some examples of prime numbers are 2, 3, 5, 7, 11, 13, and so on. 2 is the only even prime number. All other prime numbers are odd numbers. Below is a demonstration of the ...
Read MoreC++ Program to Add Two Matrix Using Multi-dimensional Arrays
A matrix is a rectangular array of numbers arranged in rows and columns. To add two matrices, they must be the same size. We add each number in the first matrix to the number in the same position in the second matrix to get a new matrix An example of the addition of two matrices is as follow: Adding Two Matrices Using Multidimensional Arrays To add two matrices in C++, we use multidimensional arrays. These arrays help us store matrix values in rows and columns, just like a real matrix. Then, we add the two matrices stored ...
Read MoreHow can we limit the number of characters inside a JTextField in Java?
In this article, we will learn how to limit the number of characters inside a JTextField in Java. Whether you're creating a form for phone numbers, zip codes, or usernames, controlling the maximum number of characters is important for data validation. JTextField A JTextField is one of the most important Swing components that allows the user to an input text value in a single line format. We can restrict the number of characters that the user can enter into a JTextField can be achieved by using the PlainDocument class. PlainDocument Class PlainDocument is a subclass that extends the AbstractDocument, a ...
Read MoreHow to read an input value from a JTextField and add to a JList in Java?
In this article, we will learn to read an input value from a JTextField and add it to a JList in Java. The Swing's two commonly used components are JTextField for text input and JList for displaying a list of items for building graphical user interfaces. JList A JList is a subclass of the JComponent class that allows the user to choose either a single selection or multiple selections. The JList class itself does not support a scrollbar. In order to add a scrollbar, we have to use the JScrollPane class together with the JList class. The JScrollPane then manages ...
Read MoreHow can we hide left/right pane of a JSplitPane programmatically in Java?
In this article, we will learn how to hide the left/right pane of a JSplitPane programmatically in Java. JSplitPane is a simple Swing component in GUI programming that allows hiding one side of the split pane, resulting in a collapsible panel look. JSplitPane A JSplitPane is a subclass of the JComponent class that allows us to arrange two components side by side horizontally or vertically in a single pane. The display areas of both components can also be adjusted at runtime by the user. The important methods of JSplitPane are remove(), removeAll(), resetToPreferredSizes(), and setDividerLocation(). A JSplitPane can generate a ...
Read MoreC++ Program to Perform Inorder Non-Recursive Traversal of a Given Binary Tree
Binary Tree traversal is a process of visiting all the nodes in a certain order. In this article, we will learn how to perform inorder non-recursive traversal of a binary tree using a stack in C++. What is Inorder Non-Recursive Traversal? Inorder traversal is a type of tree traversal, where we first visit the left subtree, then the root node, and then the right subtree. In a non-recursive approach, we are not allowed to use recursive functions to track nodes for traversing the tree. Instead, we can use an explicit stack data structure to track nodes and traverse through ...
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