Simple GUI for compound interest with java programming

By Dilip Reddy Vuyyuru

It takes input for principle amount, number of months, and interest rate from the user, and then calculates the total amount or compound interest.

 This user interface will calculate and display the total amount after the specified number of months.

Import the Scanner class from java.util package to read user input.

GUI consists of several Swing components like JFrame, JPanel, JLabel, JTextField, and JButton, which are used to create the user interface.

InterestCalculator() sets up the main JFrame and creates all the necessary components such as labels, text fields, and the "Calculate" button. It also adds an ActionListener to the "Calculate" button, which calls the  calculateTotalAmount method when the button is clicked.

The  calculateTotalAmount() method is responsible for reading the input values (principle amount, number of months, and interest rate) from the text fields. It then calculates the total amount after the specified number of months and displays the result in the resultField text field.

The calculation involves breaking down the total period into years and remaining months. It calculates the compound interest for each year and the simple interest for the remaining months. The total amount is then updated in the resultField text field with two decimal places.

If any of the input fields contain non-numeric values, a NumberFormatException is caught, and an error message dialog is shown to the user.