Question

Write an applet and design an interface which will accept miles and convert to kilometers and display the result when calculate button is pressed. Pls write code in java

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. If not, PLEASE let me know before you rate, I’ll help you fix whatever issues. Thanks

//DistanceConverter.java (applet)

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JApplet;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JTextField;

public class DistanceConverter extends JApplet implements ActionListener {

      // declaring important components

      private JTextField milesInput;

      private JTextField kmOutput;

      // this method gets called only once, at the start

      @Override

      public void init() {

            // using a grid layout with 3 rows and 2 columns

            setLayout(new GridLayout(3, 2));

            // initializing text fields and convert button

            milesInput = new JTextField(10);

            kmOutput = new JTextField(10);

            kmOutput.setEditable(false); // not editable

            JButton convert = new JButton("Convert");

            // adding each label and text field and button to the applet window

            add(new JLabel("Input distance in miles: "));

            add(milesInput);

            add(new JLabel("Distance in kilometers: "));

            add(kmOutput);

            add(convert);

            // using 300x100 size

            setSize(300, 100);

            // adding action listener to convert button

            convert.addActionListener(this);

      }

      // this method gets invoked when convert button is pressed

      @Override

      public void actionPerformed(ActionEvent e) {

            // fetching miles from milesInput as double

            double miles = Double.parseDouble(milesInput.getText());

            // converting miles to km and displaying in kmOutput textfield

            double km = miles * 1.609344;

            kmOutput.setText("" + km);

      }

}

/*OUTPUT*/