22.6

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Set;

import javax.swing.*;
import javax.swing.border.Border;

public class S22_6 extends JFrame{
    JLabel jLabel1 = new JLabel("Enter a number: ");
    JTextField jTextField1 = new JTextField(10);
    JTextArea jTextArea1 = new JTextArea();
    JButton jB1 = new JButton("Sort");
    JButton jB2 = new JButton("Shuffle");
    JButton jB3 = new JButton("Reverse");    
    JPanel jP1 = new JPanel(), jP2 = new JPanel(), jP3 = new JPanel();
    LinkedList<Integer> myList = new myLinkedList<Integer>();
    
    public S22_6(){
        jP1.setLayout(new FlowLayout(FlowLayout.CENTER));
        jP1.add(jLabel1);
        jP1.add(jTextField1);
        
        jP2.add(jTextArea1);
        jP2.setBorder(BorderFactory.createLineBorder(Color.black,2));
        
        jP3.add(jB1);
        jP3.add(jB2);
        jP3.add(jB3);
        jB1.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
                ((myLinkedList<String>) myList).Sort();
            }
            
        });
        jB2.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent arg0) {
                // TODO Auto-generated method stub
                ((myLinkedList<String>) myList).Shuffle();
            }
            
        });
        
        add(jP1,BorderLayout.NORTH);
        add(jP2,BorderLayout.CENTER);
        add(jP3,BorderLayout.SOUTH);
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        JFrame myFrame = new S22_6();
        
        myFrame.setTitle("Exercise22_6");
        myFrame.setSize(300,300);
        myFrame.setLocationRelativeTo(null); // Center the frame
        myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myFrame.setVisible(true);
        
    }
    class myLinkedList<String> extends LinkedList{
        Set<Integer> mySet = new HashSet();
        public void Sort(){
            StringBuilder  myBuilder = new StringBuilder();
//            for(Integer str:myList)
//                if(str != Integer.valueOf(jTextField1.getText()))
            
            mySet.add(Integer.valueOf(jTextField1.getText()));    
            myList.clear();
            myList.addAll(mySet);        
            Collections.sort(myList);
            
            for(Integer str:myList)
                {
                myBuilder.append(str);
                myBuilder.append(" ");
                }
            jTextArea1.setText(myBuilder.toString());
        }
        
        public void Shuffle(){
            StringBuilder  myBuilder = new StringBuilder();
            
            mySet.add(Integer.valueOf(jTextField1.getText()));    
            myList.clear();
            myList.addAll(mySet);        
            Collections.shuffle(myList);
            
            for(Integer str:myList)
                {
                myBuilder.append(str);
                myBuilder.append(" ");
                }
            jTextArea1.setText(myBuilder.toString());
        }
    }
}