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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java sql.Date setTime() method with example.
In this program, we will connect to a MySQL database using JDBC, insert a new record into the dispatches table, and retrieve all records from the table. The setTime() method from Date class of java.util package that accepts a variable of long type, representing the number of milliseconds from the epoch time (January 1, 1970, 00:00:00.000 GMT) to the required time, and sets the specified time value to the current Date object. //Setting time date.setTime(time_value_in_long); The goal of the program is to demonstrate how to interact with a database using JDBC and handle Date and Time objects in Java. ...
Read MoreJava program to increase the row height in a JTable
In the given article, we will learn to write a program in Java to increase the row height in a JTable. The example creates a table with different languages and their difficulty levels and then modifies the row height using the setRowHeight() method. Steps to increase the row height in a JTable Following are the steps to increase the row height in a JTable − Import the necessary classes from javax.swing package. Initialize a DefaultTableModel and create a JTable with it. Add columns to represent languages and ...
Read MoreJava program to iterate through each character of the string.
In this article, we will understand how to iterate through each character of the string using Java. The string is a datatype that contains one or more characters and is enclosed in double quotes (“ ”). Char is a datatype that contains an alphabet an integer or a special character. Problem Statement Write a program to Iterate through each character of the string. Below is a demonstration of the same − Input The string is defined as: Java Program Output The characters in the string are: J, a, v, a, , P, r, o, g, r, a, m, Different approaches ...
Read MoreJava program to find the area of a Trapezium
In this article, we will understand how to find the area of a trapezium using Java. The trapezium is a type of quadrilateral that has at least one pair of sides parallel to each other. The parallel sides of a trapezium are called bases and the non-parallel sides of a trapezium are called legs. It is also called a trapezoid. The area of a trapezium is calculated using the formula − (height/2 * (side_1 + side_2). i.e. Area = ½ x (sum of the lengths of the parallel sides) x perpendicular distance between parallel sides Below is a demonstration of ...
Read MoreJava program to check if none of the string in the list matches the condition
In this article, you will learn how to check if none of the strings in a list start with a specific letter using Java. This approach is useful for validating or filtering data. We will use the Stream API to evaluate the condition and return a boolean result based on whether any string starts with the given letter. Problem Statement Write a program in Java to check if none of the strings in the list matches the condition. Input pqr, stu, vwx, yza, vwxy Output No match for the starting letter as f? = true Steps to check if none of ...
Read MoreJava program to set JComboBox in JOptionPane
In this article, we will explore how to create a graphical user interface (GUI) in Java using JComboBox and JOptionPane. The program will display a pop-up dialog that contains a drop-down list, allowing the user to select their favorite sport from a list. By default, one of the options will be pre-selected, but users can change the selection. Steps to set JComboBox in JOptionPane Following are the steps to set JComboBox in JOptionPane − Create a JPanel by initializing a JPanel to hold the components. Create a JComboBox by setting up a JComboBox ...
Read MoreJava 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 a Substring is present in a given String
Suppose you are given two strings, your task is to write a Java program that checks whether the second string is the sub-string of the first one. String in Java is an immutable sequence of characters and sub-string is its small portion. Example Scenario: − Input 1: str = "The sunset is beautiful"; Input 2: sub_str = "sunset"; Output: res = found!! Using Iteration In this approach, the idea is to use a nested for loop and an if block. The outer for loop will iterate over the characters of the main string. For each starting position i, ...
Read MoreJava program to reverse each word in a sentence
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 MoreHow to print duplicate rows in a table SQL
Assume we have created a table in database and the table consists of duplicate records or, you need to check if there are multiple entries of the same record in the database. In order to find such duplicate records you can make use of below sample queries. Printing Duplicate Rows in an SQL Table Lets consider we have a table named as Students with the columns ID, Name, Age. Using the following query − CREATE TABLE Students( ID INT NOT NULL, NAME VARCHAR (20) NOT NULL, AGE ...
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