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Programming Articles
Page 1700 of 2547
Java Interview Questions on Constructors
There could be numerous interview questions on Constructors, it is not possible to cover all in just one article. However, we have researched and assorted the most popular Java interview questions on Constructors. In most of the Java interviews, the interviewers always start by asking basic questions. They can test one's knowledge in just a few minutes of the interviews. Therefore, it is essential to get thorough with the fundamental concepts of Java such as class, object and constructor. In Java interviews, the first question one might encounter is to define constructors. So, let's start our discussion with this question. ...
Read MoreJava program to find missing and additional values in two lists
In this article, we will learn to find missing and additional values in two lists in Java. By the end of this program, you'll be able to detect elements that exist in one list but not in the other, helping you better manage and analyze data in list comparisons. Problem Statement Write a program in Java to find missing and additional values in two lists. Below is the demostration − Input 101, 90, 34, 34, 67, 90 Output The missing element is : 101The new element in the list is : 67 Steps to find missing and additional values in two ...
Read MoreJava program to create a HashMap and add key-value pairs
In this article, we will write a Java program to create a HashMap and add key-value pairs. We will be using the HashMap class we can import HashMap class form java.util package. A HashMap is a collection that stores data in the form of key-value pairs, allowing quick retrieval of values based on their keys. We'll also see how to display the elements stored in the HashMap using an iterator in our given program. Problem Statement Write a program in Java to create a HashMap and add key-value pairs − Output Belt: 600Wallet: 700Bag: 1100 Steps to create a HashMap and add ...
Read MoreJava program to get random letters
In this article, we will learn to write a program in Java to get the random letters in both lowercase and uppercase. We will be using Random class from java.util package.The program will first create random lowercase letters by selecting them from the alphabet, and then it will generate random uppercase letters in a similar way. Problem Statement Write a program in Java to get the random letters both uppercase and lower case. Below is the demostration − Output Lowercase random letters...dlhjsUppercase random letters...BKIZN Step to get random letters Following are the steps to get the random letter using Java ...
Read MoreJava program to find sum of natural numbers using while loop
The sum of natural numbers can be calculated using different Iterative Statements in Programming Languages. Iterative Statements are statements that execute a particular set of code lines until the condition in the loop statement fails. In this article, we will discuss how to calculate the sum of natural numbers using a while-loop which is an iterative statement in Java. Sum of Natural Numbers The sum of natural numbers generally indicates the total sum of elements from 1 to n. Mathematically it can be represented as follows Sum of n Natural Numbers = 1+2+3+.........+(n-2) + (n-1) + n ...
Read MoreJava program to find sum of even factors of a number
In this article we’ll find the sum of even factors of a given number using Java. We’ll start by checking if the number is even, then identify all of its factors, sum up those that are even, and finally display the result. Problem Statement Write a Java program to find the sum of even factors of a number. Below is the demostration of the same − Input num=16 Ouput The sum of even factors of the number is 30 Steps to find sum of even factors of a number Following are the steps to find sum of even factors of a number ...
Read MoreJava program to multiply long integers and check for overflow
To check for Long overflow, we need to check the Long.MAX_VALUE with the multiplied long result, Here, Long.MAX_VALUE is the maximum value of the Long type in Java. Let us see an example wherein long values are multiplied and if the result is more than the Long.MAX_VALUE, then an exception is thrown. Steps to multiply long integers and check for overflow Following are the steps to multiply long integers and check for overflow in Java − Initialize long values by defining two long integers, val1 and val2. Multiply val1 and val2 to ...
Read MoreJava sql.Time valueOf() method with example
In this program, we'll demonstrate how to insert and retrieve records from a MySQL database using JDBC . Specifically, we'll focus on how to convert a time value from a String format into a java.sql.Time object using the valueOf() method. This allows us to store time values in a database and retrieve them accurately. Time time = Time.valueOf("time_string"); Steps to Use sql.Time valueOf() Method Following are the steps to use sql.Time valueOf() method − Import all the useful classes. Register the Driver by loading the MySQL JDBC driver. ...
Read MoreJava program to get the beginning and end date of the week
In this article, we'll explore how to determine the start and end dates of a week using Java. Specifically, we'll write a program that takes a given date and calculates the Monday and Sunday of that week. Problem Statement Write a Java program to find the beginning (Monday) and end (Sunday) dates of the week for a given date. Input Date = 2019-04-16 Output Start of the Week = 2019-04-15End of the Week = 2019-04-21 Steps to calculate week's start and end dates Following are the steps to get the beginning and end date of the week − ...
Read MoreJava program to determine when a Frame or Window is closing
In this article, we will learn to determine when a Frame or Window is closing in Java. We will create a simple window in Java Swing titled "Demo". It displays styled text (italic, black on orange) using a text pane inside a scrollable area. The program also listens for window-closing events, printing a message when you close it. This basic example is how to build a GUI with text styling and event handling.Steps to determine when a Frame or Window is closing Following are the steps to determine when a Frame or Window is closing in Java − ...
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