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Java Articles
Page 174 of 450
Java Program to Delete a Node From the Ending of the Circular Linked List
In this article, we will learn the remove the last node of the circular linked list in Java. We set Null to the next pointer of the second-last node to remove the last node from the regular linked list, but in the circular linked list, we need to set the root node to the next pointer of the second-last node. Steps to delete a node from the ending of the circular linked list We will find the second-last node of the circular linked list. While traversing the linked list, we can check whether the next pointer of the current node ...
Read MoreJava Program to set the extent in JSlider
In this article, we will learn how to set the extent of a JSlider using Java Swing. The extent defines the size of the range that the slider's knob can move within, restricting its movement past a certain point. JSlider JSlider is a component in Java Swing that provides a visual way to select a value by sliding a knob within a specified range. The setExtent() method in JSlider sets the size of the range that the knob covers, which controls how far it can move. setExtent() method The setExtent() method in Java is used to: ...
Read MoreJava program to convert a Map to a read only map
A read-only map in Java is a type of Map that cannot be modified after it has been created. This means that once the map has been set to be read-only, we cannot add, remove, or update any of the key-value pairs.Converting a Map to a read only map We can convert a mutable map to an immutable map, a read-only map using the Collections.unmodifiableMap() method. This method provides a way to make sure that the map cannot be modified once it has been wrapped in this method. Following are the steps to convert a Map to a read-only map ...
Read MoreJava Program to mark the current position in this input stream
In this article, we will learn to mark and reset the current position in a file input stream in Java. Marking the current position in an input stream is a crucial functionality provided by Java’s InputStream class. It enables developers to reset the stream to a previously marked position, facilitating efficient data handling, especially in scenarios like re-reading or backtracking within a file. Key Concepts Following are the key concepts we need to know to mark the current position in this input stream − InputStream Class: The InputStream class is an abstract class that represents ...
Read MoreJava Program to convert Java Float to Numeric Primitive Data Types
The Float wrapper class provides methods to convert a Float object into various numeric primitive data types like short, int, float, and double in Java. This is particularly useful when handling float values and representing them in different numeric forms.This article will show two approaches to convert a Float object to numeric primitive types using the Float class methods. Using Float Wrapper Class Methods In this approach, we use predefined methods of the Float class, such as shortValue(), intValue(), floatValue(), and doubleValue(), to convert a Float object into various primitive types. These methods directly perform the required conversions. ...
Read MoreJava Connection getTransactionIsolation() method with example
In this article, we learn the Connection getTransactionIsolation() method in Java, which allows you to determine a database connection's current transaction isolation level. Transaction isolation levels dictate how transactions interact, particularly regarding data locking during reads or writes. What is the getTransactionIsolation() Method? The getTransactionIsolation() method is part of the Connection Interface in Java. It returns an integer constant representing the current isolation level of the database connection. JDBC provides support for 5 transaction isolation levels through the Connection interface − TRANSACTION_NONE: It is represented by an integer value 0 and does not support transactions. ...
Read MoreJava Program to Perform nCr (rcombinations)
In this article, we'll learn to perform nCr (Combinations) in Java. In mathematics, nCr (combinations) is a crucial concept that helps determine how many ways you can choose r items from a set of n items, without considering the selection order. It is widely used in fields like probability, statistics, and combinatorics. What is nCr? The formula for calculating combinations (nCr) is − nCr = n! / (r! × (n - r)!) Where, n! = The factorial of n (product of all integers from 1 to n). r! = The factorial ...
Read MoreJava Program to copy all the key-value pairs from one Map into another
In Java, maps are a powerful and versatile way to store key-value pairs. Often, you may find the need to merge the contents of one map into another. This can be done effortlessly using the putAll method available in the Map interface. Let's explore this functionality with an example and a step-by-step explanation. Problem Statement The goal is to combine two maps by adding all entries or selectively adding entries without overwriting existing ones in the destination map. Input Map 1 (Destination Map) Wallet: 700 Belt: 600 Map 2 (Source Map) Bag: 1100 Sunglasses: 2000 ...
Read MoreFormatted Output in Java
In Java, the formatted output refers to a process of generating well-structured data by specifying how data should be displayed. It involves using format specifiers to control the appearance (visibility) of various data types, such as integers, floating-point numbers, strings, characters, and dates. In this article, we will discuss two key concepts about formatted output in Java as follows: Format Specifiers: Strings that define how some kinds of data should be formatted. Flags and Width: Options to control the run of the output, including aligning it, setting its padding, and regulating its width. Common Format Specifiers Format specifiers in Java ...
Read MoreFormatted Output in Java
In Java, the formatted output refers to a process of generating well-structured data by specifying how data should be displayed. It involves using format specifiers to control the appearance (visibility) of various data types, such as integers, floating-point numbers, strings, characters, and dates. In this article, we will discuss two key concepts about formatted output in Java as follows: Format Specifiers: Strings that define how some kinds of data should be formatted. Flags and Width: Options to control the run of the output, including aligning it, setting its padding, and regulating its width. Common Format Specifiers Format specifiers in Java ...
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