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Programming Articles
Page 1696 of 2547
Java Program to display upper triangular matrix
In this article, we will understand how to display an upper triangular matrix of a given matrix in Java. A matrix has row and column arrangement of its elements. A matrix with m rows and n columns can be called as m × n matrix. And, the term upper triangular matrix refers to a matrix whose all elements below the main diagonal are 0. Example Scenario: Input: matrix = { 2, 1, 4 }, { 1, 2, 3 }, { 3, 6, 2 } Output: upptri_mat = 2 1 4 0 2 3 0 0 2 Using ...
Read MoreJava program to check order of characters in string
You are given a String, your task is to write a program in Java that checks the order of its characters. If the order is previously defined, you have to check if the characters are in the given order otherwise check for alphabetical order. Let's understand the problem statement with an example − Example Scenario: Input: str = "abcmnqxz"; Output: res = TRUE The given string is in alphabetical order. Using Iteration In this approach, use a for loop to iterate over the string and check if the value of character at the current place and the previous ...
Read MoreJava program to find longest common prefix using word by word matching
In this article, we will explore how to find the longest common prefix among a given set of strings using two different approaches in Java. We will first discuss an approach that compares all strings directly to find the longest prefix and then move to a word-by-word matching approach. Problem Statement We are given a set of strings and we have to find the common prefix among all of them. A prefix is a substring for a string that contains the zero index and could be of any length from 1 to a complete string. Input 1 string arr[] = ...
Read MoreJava 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 ...
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