import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.util.*;
import java.awt.event.*;

class StringDemo extends JFrame{

 JLabel label;
 final JTextField  text;
  StringDemo(){
    setTitle("Login Form");
    setLayout(null);
    label = new JLabel("Enter Text");
    text = new JTextField(20);

    JButton b1=new JButton("To Uppercase");
    JButton b2=new JButton("To Lowercase");
    JButton b3=new JButton("Reverse Order");
    JButton b4=new JButton("Length of Text");

    JPanel p1=new JPanel(new GridLayout(1,1));
    JPanel p2=new JPanel(new GridLayout(1,4));
    p1.add(label);
    p1.add(text);

    p2.add(b1);
    p2.add(b2);
    p2.add(b3);
    p2.add(b4);

    JFrame f=new JFrame();
    f.add(p1,BorderLayout.NORTH);
    f.add(p2,BorderLayout.CENTER);
    f.setVisible(true);
    f.pack();
    b1.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        String st=text.getText();
        String uppercase=st.toUpperCase();
        JOptionPane.showMessageDialog(null,"Text in Uppercase: "+uppercase);
        }
    });
    b2.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        String st=text.getText();
        String lowercase=st.toLowerCase();
        JOptionPane.showMessageDialog(null,"Text in Lowercase: "+lowercase);
        }
    });
    b3.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        String st=text.getText();
        String reverse=new StringBuffer(st).reverse().toString();
        JOptionPane.showMessageDialog(null,"Text in reverse: "+reverse);
        }
    });
    b4.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        String st=text.getText();
        int len=st.length();
        JOptionPane.showMessageDialog(null,"Length of Text: "+len);
        }
    });
  }
  public static void main(String []args){
      new StringDemo();
  }
}