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Java Articles
Page 137 of 450
How can we implement the paintComponent() method of a JPanel in Java?
In this article, we will learn to implement the paintComponent() method of a JPanel in Java. In Swing, custom rendering of components is achieved by overriding the paintComponent() method. What is a JPanel? A JPanel is a lightweight container and it is an invisible component in Java. A JPanel's default layout is FlowLayout. After the JPanel has been created, other components can be added to the JPanel object by calling its add() method inherited from the Container class. What is a paintComponent() Method? The paintComponent() method is needed to draw something on a JPanel other than drawing the background color. This ...
Read MoreHow can we implement a splash screen using JWindow in Java?
JWindow is a Swing component that is used to create a splash screen easily as splash screen as it displays a screen without a title bar or window management buttons. In this article, we will learn to implement a splash screen using JWindow in Java. What is a JWindow? A JWindow is a container that can be displayed anywhere on the user's desktop. It does not have the title bar, window management buttons, etc, like a JFrame. The JWindow contains a JRootPane as its only child class. The contentPane can be the parent of any children of the JWindow. Like a ...
Read MoreJava Program to Print the Multiplication Table in Triangular Form
In this article, we will understand how to print a multiplication table in triangular form. To print in triangular form, the table will display row and column-wise. And in every row, entries will be up to the same column number. Below is a demonstration of the same - Input : rows = 7 Output: 1 2 4 3 6 9 4 8 12 16 5 10 15 20 25 6 12 18 24 30 36 7 14 21 28 35 42 49 Multiplication Table in a Triangular Shape Multiplication table in triangular form is achieved using a nested ...
Read MoreJava Program to Display Factors of a Number
In this article, we will understand how to display the factors of a number. Factors are numbers that divide the original number without leaving a remainder. For example, 1, 2, 3, 4, 6, and 12 are factors of 12. If a and b are factors of a number, then a x b is also a factor of the number. If we multiply 3 and 5, we get 15. We say that 3 and 5 are factors of 15. The largest factor of any number is the number itself, and the smallest factor is 1. 1 ...
Read MoreHow can we highlight the selected tab of a JTabbedPane in Java?
In this article, we will learn to highlight the selected tab of a JTabbedPane in Java. JTabbedPane is a common Swing component that is used to organize content into multiple tabs, while highlighting a selected tab will improve the GUI and make the interface interactive. What is a JTabbedPane? A JTabbedPane is a subclass of the JComponent class, and it can provide easy access to more than one panel. Each tab is associated with a single component that can be displayed when the tab is selected. A JTabbedPane can generate a ChangeListener interface when a tab is selected. What do ...
Read MoreJava program to check the birthday and print happy birthday message
In this article, we will understand how to check the birthday and print Happy Birthday message. Checking the birthday is achieved by comparing the present day and the given birthday. Problem Statement Write a program that checks if today's date matches a predefined birthday date. If the dates match, the program should print a "Happy Birthday" message otherwise, it should indicate that today is not the birthday. Below is a demonstration of the same − Input Birthday Date: 15 July Output Today’s Date is 20-12-2021 Today is not my birthday Different ways to check the birthday ...
Read MoreHow to implement the Fibonacci series in JShell in Java 9?
In this article, we will learn to implement the Fibonacci series in JShell in Java 9. First, we will learn how the Fibonacci series works, then learn two approaches(iterative and recursive) to implement this sequence in the JShell environment. JShell JShell is a Java shell tool introduced in Java 9 that allows us to execute Java code and print the result immediately. It is a REPL (Read-Evaluate-Print-Loop) tool that runs from the command-line prompt. What is a Fibonacci Series? A number is said to be in the Fibonacci series if each subsequent number is the sum of the previous two ...
Read MoreJava Program to Create Pyramid and Pattern
In this article, we will learn to create pyramid patterns using Java. It will help us to understand how loops work. for loop while loop Java program to create pyramid patterns We are going to print the following pyramid patterns: Half Star Pyramid Inverted Half Star Pyramid Star Pyramid Inverted Star Pyramid Numeric Pyramid Pattern 1: Half Star Pyramid We will initialize the row to 5 and a loop runs from i-1 to i
Read MoreJava Program to Calculate Interest for FDs and RDs using Inheritance
Inheritance is a concept that allows us to access the properties and behaviors of one class in another class. The class whose methods and member variables are inherited is known as the super class or parent class, and the class that inherits these methods and member variables is known as the child class or subclass. In Java, we use the extends keyword to inherit a class. Problem Statement Write Java programs that calculate interest for Fixed Deposits (FDs) and Recurring Deposits (RDs) using inheritance. The program should prompt the user to choose between FD and RD, enter the amount and duration, ...
Read MoreJava Program to check Eligibility of TPP students for appearing in Interviews
Checking Eligibility of TPP Students in Java Consider the following table for eligibility criteria of different companies for appearing in interviews: CGPA ...
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