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Articles by Samual Sam
Page 89 of 151
Java program to get first Friday in a month
In this article, we'll explore how to get the first Friday of any given month in Java. The program will use Java's LocalDate class and TemporalAdjusters to automatically calculate the first Friday based on the input date. We will walk through how this works step by step and see how the code performs this task. Problem Statement Write a program in Java to get the first Friday in a month. Below is a demonstration of the same − Input Current date = 2019-04-01 Output Current date = 2019-04-01 First Friday date = 2019-04-05 Steps to get the first Friday in a ...
Read MoreJava program to check if two given matrices are identical
Problem Statement Two matrices are identical if their number of rows and columns are equal and the corresponding elements are also equal. An example of this is given as follows. Input Matrix A = 1 2 3 4 5 6 7 8 9 Matrix B = 1 2 3 4 5 6 7 8 9 The matrices A and B are identical Output Both the matrices are identical Steps to check if two given matrices are identical Following are the steps to check if two given matrices are identical − Initialize two matrices by defining two ...
Read MoreJava program to convert properties list into a Map
In this article, we will learn how to convert a Properties list into a Map in Java. The Properties class is commonly used to store key-value pairs, but sometimes you may need to work with these pairs in a Map structure. We will demonstrate how to take the properties and convert them into a HashMap. Problem Statement Write a program in Java to convert the properties list into a Map structure − Output Key and Value of the Map... P: 1 Q: 2 R: 3 S: 4 T: 5 U: 6 V: 7 Steps to convert the properties list into ...
Read MoreJava program to display printable characters
In this article, we will learn to display printable characters in Java. The program uses ASCII code from 32 to 126, which correspond to printable symbols, numbers, and letters. Instead of using System.out.println(), we will use System.out.write() to print each character. Problem Statement Write a Java program that displays all printable characters by iterating through their ASCII values − Output Printable characters... ! " # $ % & '( ) * + , - . /0 1 2 3 4 5 6 78 9 : ; < = > ?@ A B C D E F GH I J K L M N OP Q R S T U V WX Y Z [ \ ] ^ _` a b c d e f gh i j k l m n op q r s t u v wx y z { | } ~ Steps to display printable characters Following are the steps to display printable characters − Start by printing the message "Printable characters...". Use a for loop to iterate over ASCII ...
Read MoreJava program to get the difference between two time zones by seconds
In this article, we will learn to get the difference between two time zones by seconds using Java. We'll use LocalDateTime, ZoneId, and ZonedDateTime classes from java.time package to achieve this.Problem Statement Write a program in Java to get the difference between two time zones by seconds − Output Difference between two time zones in seconds = 28800 Steps to get the difference between two time zones by seconds Following are the steps to get the difference between two time zones by seconds − First, we will import the necessary classes LocalDateTime, ZoneId, and ZonedDateTime from ...
Read MoreJava program to add 3 months to the calendar
In this article, we will learn to add 3 months to the calendar. We will take the current date and add 3 months to it using Calendar class in Java. You’ll see how to handle date manipulation and update the date accordingly. Problem Statement Write a program in Java to add 3 months to the calendar. Below is the demonstration of the same − Input Current Date = Fri Nov 23 06:38:56 UTC 2018 Output Updated Date = Sat Feb 23 06:38:56 UTC 2019 Different approaches Below are the different approaches to add 3 months to the calendar − ...
Read MoreJava program to change JLabel text after creation
In this article, we will learn to change JLabel text after creation in Java. We'll cover two scenarios: changing the label text immediately after creation and updating it in response to a button click. Different approaches to change JLabel text after creation Below are the different approaches to change JLabel text after the creation − Using setText() Method Using a button click Update JLabel text using setText() method Following are the steps to update JLabel text immediately after creation − First we will import JFrame, JLabel, and ...
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 MoreCheck whether the String contains only digit characters in Java
Introduction In this article, we'll explore how to check whether a given string contains only digits or a mix of digits and other characters in Java. We'll achieve this by using the String class and its matches() method. Problem Statement Given a string write a Java program to check whether it contains only digit characters. Input 1 4434 Output 1 String contains only digits! Input 2 5demo9 Output 2 String contains digits as well as other characters! Steps to check digit characters in String The following are the steps to check whether the String contains only digit characters in ...
Read MoreJava program to subtract year from current date
In this article, we will learn to subtract a year from the current date using Java. We will be using the Calender class of java.util package. Calendar class in Java is an abstract class that provides different methods to convert between a specific instant in time and a set of calendar fields such as HOUR, DAY_OF_MONTH, MONTH, YEAR, and so on. It is also used for manipulating the calender field. Steps to subtract year from current date Following are the steps to subtract year from current date − Import the Calendar class from the java.util package. ...
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