Hi Friend,

Through the following values, we have converted miles into different units.
1 mile=1.609344, 1 meter=39.3700787 inches and 1 inch=0.0254 meter.

Try the following:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.regex.*;
import java.text.*;

class ConvertMile extends JFrame{
JTextField t1,t2,t3,t4,t5;
JLabel l1,l2, l3, l4, l5;
JPanel p,p1,p2;
JButton b;
ConvertMile(){
p=new JPanel(new GridLayout(6,2));
p1=new JPanel(new GridLayout(2,2));
p2=new JPanel(new GridLayout(4,2));
t1=new JTextField(20);
t2=new JTextField(20);
t3=new JTextField(20);
t4=new JTextField(20);
t5=new JTextField(20);
l1=new JLabel("Enter distance( in Miles)");
l2=new JLabel("In KM");
l3=new JLabel("In M");
l4=new JLabel("In Inches");
l5=new JLabel("In CM");
b=new JButton("Convert");
t1.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String input=t1.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
Matcher m = p.matcher(input);
if (m.find()) {
JOptionPane.showMessageDialog(null, "Please enter only numbers");
}
}
});
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String value=t1.getText();
double distance=Double.parseDouble(value);
if(distance<=0){
JOptionPane.showMessageDialog(null,"The value must be greater than zero");
}
else{
double km=distance * 1.609344;
double m=km * 1000;
double cm=m * 100;
double inch=m * 39.3700787;
DecimalFormat f = new DecimalFormat("##.### ");
t2.setText(f.format(km)+" KM");
t3.setText(f.format(m)+" M");
t4.setText(f.format(inch)+" Inches");
t5.setText(f.format(cm)+" CM");

}
}
});
p1.add(l1);
p1.add(t1);
p1.add(b);

p2.add(l2);
p2.add(t2);
p2.add(l3);
p2.add(t3);
p2.add(l4);
p2.add(t4);
p2.add(l5);
p2.add(t5);
p.add(p1);
p.add(p2);
add(p);
setVisible(true);
pack();
}
public static void main(String[] args)
{

ConvertMile m=new ConvertMile();
}
}
Thanks