Let’s say we have the following string −String myStr1 = "Jack Sparrow";Let us check the string now whether it is not null or not empty.if(myStr != null || myStr.length() != 0) { System.out.println("String is not null or not empty");Example Live Demopublic class Demo {    public static void main(String[] args) {       String myStr = "Jack Sparrow";       boolean res;       if(myStr != null || myStr.length() != 0) {          System.out.println("String is not null or not empty");       } else {          System.out.println("String is null or empty");       }    } }OutputString is not null or not empty

Given a sentence or string, write a Java program to reverse each word in that sentence. Each word in that sentence should be reversed and at the same time, they should be in the same order as before. Let's understand the problem with an example − Example Scenario: Input: orgnl_sen = an apple is red Output: modfd_sen = na elppa si der Using Iteration First, split the given sentence into an array of words using the space character as the delimiter. Use a for-each loop to iterate over each word. Then, iterate through the characters of each ... Read More

Import the following package for Calendar class in Java.import java.util.Calendar;Firstly, create a Calendar object and display the current date and time.Calendar calendar = Calendar.getInstance(); System.out.println("Current Date and Time = " + calendar.getTime());Now, let us increment the seconds using the calendar.add() method and Calendar.SECOND constant.calendar.add(Calendar.SECOND, 15);Example Live Demoimport java.util.Calendar; public class Demo {    public static void main(String[] args) {       Calendar calendar = Calendar.getInstance();       System.out.println("Current Date = " + calendar.getTime());       // Add 15 seconds to current date       calendar.add(Calendar.SECOND, 15);       System.out.println("Updated Date = " + calendar.getTime());    } ... Read More

When working with dates in Java, it's common to need to increment or decrement months. The Calendar class makes it easy to manipulate dates. This article shows how to decrement the current date by a specified number of months using the Calendar class. Problem Statement Given a Java program to decrement the current date by a specified number of months using the Calendar class. Output Current Date = Thu Nov 22 16:37:42 UTC 2018 Updated Date = Thu Mar 22 16:37:42 UTC 2018 Basic Approach Below are the steps to subtract months from current date using Calendar.add() ... Read More

The given task is to add months to a date (object) using the add() method of the Calendar class. For example, if we need to add 5 months to the date: 26-06-2025, the new date would be 26-11-2025. Calendar.add() method in Java The calender.add() method in Java is used to add a specified amount of time to any field of the Calendar. Using this method, we can add months, years, days, etc. This method accepts two parameters: the first one is the field we want to add to, and the second one is the amount we want to ... Read More

Import the following package for Calendar class in Java.import java.util.Calendar;Firstly, create a Calendar object and display the current date and time.Calendar calendar = Calendar.getInstance(); System.out.println("Current Date and Time = " + calendar.getTime());Now, let us decrement the minutes using the calendar.add() method and Calendar.MINUTE constant. Set a negative value since you want to decrease the minutes.calendar.add(Calendar.MINUTE, -15);Example Live Demoimport java.util.Calendar; public class Demo {    public static void main(String[] args) {       Calendar calendar = Calendar.getInstance();       System.out.println("Current Date = " + calendar.getTime());       // Subtract 15 minutes from current date       calendar.add(Calendar.MINUTE, -15); ... Read More

Java provides a built-in class called Calendar that allows developers to work with dates and times in their applications. The Calendar class provides various methods to manipulate dates and times, such as adding or subtracting days, months, years, hours, minutes, and seconds. Problem Statement Write a Java program to increment the current time by 10 minutes using the Calendar class. Output Current Date = Thu Nov 22 16:24:27 UTC 2018 Updated Date = Thu Nov 22 16:34:27 UTC 2018 Steps to add minutes to current time using Calendar.add() method Below are the steps to add minutes to current time using ... Read More

In this article, we use the Calendar class in Java to work with dates and times. First, it retrieves the current date and time and displays it. Then, the program increments the current time by 5 hours using the add() method and displays the updated date and time. This is a simple example of modifying and handling date-time values programmatically. Subtracting hours from current time using Calendar.add() method. Calendar class The Java Calendar class is found in the java.util package. It is an abstract class that provides methods for converting a specific moment in time into various calendar fields such ... Read More

What is the Calendar.add() method in Java? The add() method belongs to the java.util.Calendar class. This method is used to add or subtract a specified amount of time to any field of the calendar. For example, we can add months, years, days, hours, minutes, etc., to the current date or current time using this method. Syntax Following is the syntax of the calendar.add() method: calendar.add(Calendar.HOUR, amount); Here, Calendar.HOUR is a constant that represents the hour field in the calendar, and amount is the number of hours you want to add to the current date. Adding Hours to Current Time ... Read More

Import the following package for Calendar class in Java.import java.util.Calendar;Firstly, create a Calendar object and display the current date.Calendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime());Now, let us subtract the days using the add() method and Calendar.DATE constant. Set a negative value here since we are decrementing.calendar.add(Calendar.DATE, -2);Example Live Demoimport java.util.Calendar; public class Demo {    public static void main(String[] args) {       Calendar calendar = Calendar.getInstance();       System.out.println("Current Date = " + calendar.getTime());       // Decrementing days by 2       calendar.add(Calendar.DATE, -2);       System.out.println("Updated Date = " + ... Read More