convert-currency.java

// Java program to convert from
// rupee to the dollar and vice-versa
// using Java Swing

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class GFG {

	// Function to convert from rupee
	// to the dollar and vice-versa
	// using Java Swing
	public static void converter()
	{

		// Creating a new frame using JFrame
		JFrame f = new JFrame("CONVERTER");

		// Creating two labels
		JLabel l1, l2;

		// Creating two text fields.
		// One for rupee and one for
		// the dollar
		JTextField t1, t2;

		// Creating three buttons
		JButton b1, b2, b3;

		// Naming the labels and setting
		// the bounds for the labels
		l1 = new JLabel("Rupees:");
		l1.setBounds(20, 40, 60, 30);
		l2 = new JLabel("Dollars:");
		l2.setBounds(170, 40, 60, 30);

		// Initializing the text fields with
		// 0 by default and setting the
		// bounds for the text fields
		t1 = new JTextField("0");
		t1.setBounds(80, 40, 50, 30);
		t2 = new JTextField("0");
		t2.setBounds(240, 40, 50, 30);

		// Creating a button for INR,
		// one button for the dollar
		// and one button to close
		// and setting the bounds
		b1 = new JButton("INR");
		b1.setBounds(50, 80, 60, 15);
		b2 = new JButton("Dollar");
		b2.setBounds(190, 80, 60, 15);
		b3 = new JButton("close");
		b3.setBounds(150, 150, 60, 30);

		// Adding action listener
		b1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				// Converting to double
				double d
					= Double.parseDouble(t1.getText());

				// Converting rupees to dollars
				double d1 = (d / 65.25);

				// Getting the string value of the
				// calculated value
				String str1 = String.valueOf(d1);

				// Placing it in the text box
				t2.setText(str1);
			}
		});

		// Adding action listener
		b2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				// Converting to double
				double d2
					= Double.parseDouble(t2.getText());

				// converting Dollars to rupees
				double d3 = (d2 * 65.25);

				// Getting the string value of the
				// calculated value
				String str2 = String.valueOf(d3);

				// Placing it in the text box
				t1.setText(str2);
			}
		});

		// Action listener to close the form
		b3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				f.dispose();
			}
		});

		// Default method for closing the frame
		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});

		// Adding the created objects
		// to the form
		f.add(l1);
		f.add(t1);
		f.add(l2);
		f.add(t2);
		f.add(b1);
		f.add(b2);
		f.add(b3);

		f.setLayout(null);
		f.setSize(400, 300);
		f.setVisible(true);
	}

	// Driver code
	public static void main(String args[])
	{
		converter();
	}
}