isPolindromeJavaUI

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class CalculatorFrame extends JFrame {
    CalculatorFrame(){
        int w=270, h=240;
        setTitle("Полиндром");
        setBounds(100,100,w,h);
        CPanel panel = new CPanel(w, h);
        add(panel);
        setResizable(false);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

class CPanel extends JPanel {
    public JTextField TF;
    CPanel(int W,int H) {
        int w=W/5, h=H/8,sx=w/5,sy=h/3;
        setLayout(null);
        setBounds(0,0,W,H);
        JTextField TF = new JTextField();
        TF.setHorizontalAlignment(JTextField.RIGHT);
        TF.setBounds(sx,sy,2*sx+3*w,h);
        TF.setEditable(true);
        add(TF);
        JButton Btn = new JButton("Проверить");
        Btn.setBounds(10,50,175,50);
        Btn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
               /* JOptionPane.showMessageDialog(CPanel.this,
                        "Ваше слово: " + TF.getText());*/
                boolean palindrom = false;
                char[] warray = TF.getText().toCharArray();
                for (int i=0; i<warray.length;i++) {
                    if(warray[i] != warray[warray.length-i-1]){
                        palindrom = false;
                    }else{
                        palindrom = true;
                    }
                }
                  JOptionPane.showMessageDialog(CPanel.this,
                        "Истинность: " + palindrom);
            }
        });
        Btn.setFocusPainted(false);
        Btn.setForeground(Color.RED);
        add(Btn);
    }}

class TypeConv{
    public static void main(String[] args) {
        new CalculatorFrame();
    }
}