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Java Simple Interest Calculator
In Java

Java GUI Simple Interest Calculator

1 Min Read

Simple Java GUI Calculator that performs simple interest calculation.

GUI Simple Interest Calculator using Java
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import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.border.TitledBorder;
 
public class ModifiedGUISimpleInterestCalculator extends JFrame {
    //create TextFields for principal, rate and time
 
    private JTextField principal = new JTextField();
    private JTextField rate = new JTextField();
    private JTextField time = new JTextField();
    private JTextField simpleInterest = new JTextField();
    // calculate JButton
    private JButton clear = new JButton("Clear");
    private JButton calculate = new JButton("Calculate");
    //private JButton clear = new JButton("Clear");
    //create JTextArea
    JTextArea area = new JTextArea(1, 1);
 
    public ModifiedGUISimpleInterestCalculator() {
        // panel panel to hold labels and text fields
        JPanel panel1 = new JPanel(new GridLayout(5, 2));
        panel1.add(new JLabel("Enter Principal"));
        panel1.add(principal);
        panel1.add(new JLabel("Enter Rate"));
        panel1.add(rate);
        panel1.add(new JLabel("Enter Time"));
        panel1.add(time);
        panel1.add(new JLabel("Simple Interest"));
        panel1.add(simpleInterest);
        panel1.setBorder(new TitledBorder("Enter Principal, Rate (as decimal e.g 0.1 for 10%) and Time."));
 
        principal.setBorder(BorderFactory.createEtchedBorder());
        rate.setBorder(BorderFactory.createEtchedBorder());
        time.setBorder(BorderFactory.createEtchedBorder());
        simpleInterest.setBorder(BorderFactory.createEtchedBorder());
        simpleInterest.setEditable(false);
        simpleInterest.setForeground(Color.RED);
 
        // Panel p2 to hold the button
        JPanel panel2 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
 
        //panel2.add(clear);
        panel2.add(clear);
        panel2.add(calculate);
 
        // Add the panels to the frame
        add(panel1, BorderLayout.CENTER);
        add(panel2, BorderLayout.SOUTH);
 
        area.setForeground(Color.BLACK);
        area.setBackground(Color.WHITE);
        area.setLineWrap(true);
        area.setWrapStyleWord(true);
        area.setEditable(false);
 
        calculate.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // Get values from text fields
                try {
                    double amount = Double.parseDouble(principal.getText());
                    double rateOfInterest = Double.parseDouble(rate.getText());
                    double year = Double.parseDouble(time.getText());
 
 
 
                    String interest = "" + (amount * rateOfInterest * year);
                    // Display simple interest
                    simpleInterest.setText((interest));
                } catch (Exception f) {
                    JOptionPane.showMessageDialog(rootPane, "ERROR: " + (f.getMessage()));
                }
 
                String amountField = principal.getText();
                String rateOfInterestField = rate.getText();
                String yearField = time.getText();
 
                if (e.getSource() == calculate) {
 
                    if ("".equals(amountField) || "".equals(rateOfInterestField) || "".equals(yearField)) {
                        String emptyFieldWarning;
                        emptyFieldWarning = "One or more fields is/are empty!";
                        JOptionPane.showMessageDialog(rootPane, emptyFieldWarning);
                    }
                }
            }
        });
 
        clear.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // Get values from text fields
                try {
                    principal.setText("");
                    rate.setText("");
                    time.setText("");
                    simpleInterest.setText("");
                } catch (Exception f) {
                }
            }
        });
    }
    //create main method to run application
 
    public static void main(String[] args) {
 
        ModifiedGUISimpleInterestCalculator calculator = new ModifiedGUISimpleInterestCalculator();
        calculator.setSize(360, 200);
        calculator.setTitle(" Simple Interest Calculator ");
        calculator.setResizable(false);
        calculator.setVisible(true);
        calculator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

Below is a screenshot of the output when the program is run.  Click…

Read More
Simple C Calculator
In C

Highest and Lowest Value C Program

1 Min Read

Program to accept five integer values from the user and calculate the sum, product, average, highest value and lowest value.

Sum, Product, Average, Highest and Lowest in C
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#include <stdio.h>
 
int main (void) {
  int a, b, c, d, e, sum, prod, ave;
 
  printf("Enter five integer numbers: ");
  scanf("%d%d%d%d%d", &a, &b, &c, &d, &e);
  sum = a + b + c + d + e;
  printf("\n\nSum is %d\n", sum);
  prod = a * b * c * d * e;
  printf("Product is %d\n", prod);
  ave = (a + b + c + d + e) / 5;
  printf("Average is %d\n", ave);
 
/*calculate for highest number*/
 
  if (a > b && a > c && a > d && a > e){
    printf("Highest number is %d\n", a);
  }
  else if (b > a && b > c && b > d && b > e){
    printf("Highest number is %d\n", b);
  }
  else if (c > a && c > b && c > d && c > e){
    printf("Highest number is %d\n", c);
  }
  else if (d > a && d > b && d > c && d > e){
    printf("Highest number is %d\n", d);
  }
  else if (e > a && e > b && e > c && e > d){
    printf("Highest number is %d\n", e);
  }
  else {
    puts ("One or more numbers are equal.\n");
  }
 
/*calculate for lowest number*/
 
  if (a < b && a < c && a < d && a < e){
    printf("Lowest number is %d\n", a);
  }
  else if (b < a && b < c && b < d && b < e){
    printf("Lowest number is %d\n", b);
  }
  else if (c < a && c < b && c < d && c < e){
    printf("Lowest number is %d\n", c);
  }
  else if (d < a && d < b && d < c && d < e){
    printf("Lowest number is %d\n", d);
  }
  else if (e < a && e < b && e < c && e < d){
    printf("Lowest number is %d\n", e);
  }
  else {
    puts ("One or more numbers are equal.\n");
  }
 
  return 0;
}

Below…

Read More
In C

C Program to Add Two Numbers

1 Min Read

A simple C program to add two integer numbers.

Simple C Addition Program
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#include <stdio.h>
 
int main (void) {
  int x, y, z;
 
  x = 5;
  y = 52;
  z = x + y;
 
  printf("\n\nx = 5 \ny = 52 \n");
  printf("z = x + y = %d", z);
  
  return 0;
}

Read More
checkerboard pattern of asterisks
In Java

Java Program: Checkerboard Pattern of Asterisks

1 Min Read

Question: Write an application that displays a checkerboard pattern, as follows:

CheckerboardPatternOfAsterisks.java
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public class CheckerboardPatternOfAsterisks {
    public static void main (String [ ] args) {
        
        System.out.print("********\n ********\n********\n ********\n"
                + "********\n ********\n********\n ********\n");
 
    }
}

Note that this program can also be written using eight System.out.println…

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