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Articles by Chandu yadav
Page 37 of 81
How to print out the contents of a vector in C++?
Vectors are similar to the dynamic arrays but vectors can resize. They are sequence containers that can change their size according to the insertion or deletion of elements. Containers are the objects which holds the data of same type. Vectors may allocate some extra storage for the future growth of elements in the vector. Its elements are stored in the contiguous memory. The data is entered at the end of vector. In this article, we will show you how to print the contents of a vector in C++. Example Scenario: std::vector vec = {10, 20, 30, 40, 50}; You ...
Read MoreJava program to deselect a range of columns in a JTable
In this article, we will learn how to deselect a range of columns in a JTable using Java. JTable is a part of the Swing framework in Java, which is used to display and edit tables. Sometimes, we may want to deselect a specific range of columns after selecting columns in a table. This can be done by using the removeColumnSelectionInterval() method. Problem Statement Given a JTable with columns selected, write a Java program to deselect a range of columns from the table. Input A JTable with columns selected.Output The specified range of columns will be deselected. Steps to ...
Read MoreJava program to find if the given number is a leap year?
In this article, we will learn to find if a year is a leap year or not using Java. Finding whether a year is a leap or not is a bit tricky. We generally assume that if a year number is evenly divisible by 4 is a leap year. But it is not the only case. A year is a leap year if − It is evenly divisible by 100 If it is divisible by 100, then it should also be divisible by 400 Except this, all ...
Read MoreJava program to check occurrence of each character in String
To find the occurrence of each character in a string we can use the Map utility of Java. In Map a key cannot be duplicated so make each character of the string a key of Map and provide the initial value corresponding to each key as 1 if this character is not inserted in Map before. Now when a character repeats during insertion as a key in Map increases its value by one. Continue this for each character until all characters of the string get inserted. Problem Statement Write a program in Java to check the occurrence of each character in ...
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 − ...
Read MoreJava object creation of Inherited class
The constructor is something responsible for the object creation of a particular class in Java. Along with other functions of the constructor, it also instantiates the properties/instances of its class. In Java by default super() keyword is used as the first line of the constructor of every class, here the purpose of this method is to invoke the constructor of its parent class so that the properties of its parent get well instantiated before subclass inherits them and use. The point that should remember here is when you create an object the constructor is called but it is not mandatory that ...
Read MoreJava Program to add Combo Box to JTable
In this article, we will learn how to add a JComboBox to a JTable in Java Swing. The JComboBox allows you to create a drop-down list within a table cell, enabling users to select from predefined options. Steps to add a combo box to JTable Following are the steps to add a combo box to JTable − First import the necessary packages. Initialize a JTable with 5 rows and 5 columns. Create a JComboBox and add items to it. Get the first column of ...
Read MoreJava program to swap two integers
In this article, we will learn to swap two numbers using Java. We will use the Scanner class to get the user input and perform the swapping temporary variable. Read integers from users using the nextInt() method of the Scanner class. Steps to swap two integers Following are the steps to swap two numbers in Java− Import the Scanner class. Create a variable (temp), and initialize it with 0. Assign 1st number to temp. Assign the 2nd number to the 1st number. ...
Read MoreJava program to count upper and lower case characters in a given string
In order to count upper and lower case character we have to first find weather a given character is in upper case or in lower case. For this we would take concept of ASCII value of each character in Java. In Java as we know for each character has corresponding ASCII value so we would compare each character that it lies in the range of upper case or in lower case. Counting upper and lower case characters in a string in Java In below example first convert string to a character array for easy transverse, then find weather it lies ...
Read MoreJava program to find the GCD or HCF of two numbers
An H.C.F or Highest Common Factor, is the largest common factor of two or more values.For example factors of 12 and 16 are −12 → 1, 2, 3, 4, 6, 12 16 → 1, 2, 4, 8, 16The common factors are 1, 2, 4 and the highest common factor is 4.AlgorithmDefine two variables - A, BSet loop from 1 to max of A, BCheck if both are completely divided by same loop number, if yes, store itDisplay the stored number is HCFExample: Using Java for loop import java.util.Scanner; public class GCDOfTwoNumbers { public static void main(String args[]){ ...
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