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package CongTruNhanChia;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import static javax.swing.GroupLayout.Alignment.BASELINE;
import static javax.swing.GroupLayout.Alignment.TRAILING;

public class UI extends JFrame {
    JTextField txtHeSoA,txtHeSoB,txtKetQua;
    ButtonGroup btnGroupPhepTinh;
    JRadioButton radioCong,radioTru,radioNhan,radioChia;
    JButton btnGiai,btnXoa,btnThoat;

public UI(){
        initComponent();
        initListenEvent();
    }

/**
     * Create JFrame
     */
    private void initComponent()
    {
        // Setup JFrame
        this.setSize(600,400);
        this.setTitle("Cộng Trừ Nhân Chia");
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setLocationRelativeTo(null);

// Setup Container
        Container con = getContentPane();

// Setup JPanel Title
        JPanel panelTitle = new JPanel(new FlowLayout());
        panelTitle.setBackground(Color.decode("#73C6B6"));

//// JLabel - Title
        JLabel labelTitle = new JLabel("Cộng Trừ Nhân Chia");
        labelTitle.setFont(new Font("Arial",Font.BOLD,24));
        panelTitle.add(labelTitle);

// Setup JPanel Content
        JPanel panelContent = new JPanel();
        GroupLayout GL = new GroupLayout(panelContent);
        panelContent.setLayout(GL);
        panelContent.setBorder(BorderFactory.createTitledBorder("nhập 2 số a và b"));

//// Setup TextField - HeSoA
        JLabel labelHeSoA = new JLabel("a:");
        txtHeSoA = new JTextField(25);

//// Setup TextField - HeSoB
        JLabel labelHeSoB = new JLabel("b:");
        txtHeSoB = new JTextField(25);

//// Setup TextField - KetQua
        JLabel labelKetQua= new JLabel("Kết Quả:");
        txtKetQua = new JTextField(25);

//// Setup JPanel Cong Tru Nhan Chia
        JPanel panelPhepTinh = new JPanel(new GridLayout(2,2));
        panelPhepTinh.setPreferredSize(new Dimension(100,50));
        panelPhepTinh.setBorder(BorderFactory.createTitledBorder("Chọn phép toán"));

//// Setup JRadioButton Group
        btnGroupPhepTinh = new ButtonGroup();
        radioCong = new JRadioButton("Cộng",true);
        radioTru = new JRadioButton("Trừ");
        radioNhan = new JRadioButton("Nhân");
        radioChia = new JRadioButton("Chia");
        btnGroupPhepTinh.add(radioCong);
        btnGroupPhepTinh.add(radioTru);
        btnGroupPhepTinh.add(radioNhan);
        btnGroupPhepTinh.add(radioChia);
        panelPhepTinh.add(radioCong);
        panelPhepTinh.add(radioTru);
        panelPhepTinh.add(radioNhan);
        panelPhepTinh.add(radioChia);

// Add Component into JPanel TextField
        GL.setAutoCreateGaps(true);
        GL.setAutoCreateContainerGaps(true);
        GL.setHorizontalGroup(GL.createSequentialGroup()
                .addGroup(GL.createParallelGroup(TRAILING)
                        .addComponent(labelHeSoA)
                        .addComponent(labelHeSoB)
                        .addComponent(labelKetQua))
                .addGroup(GL.createParallelGroup()
                        .addComponent(txtHeSoA)
                        .addComponent(txtHeSoB)
                        .addComponent(panelPhepTinh)
                        .addComponent(txtKetQua))
        );

GL.setVerticalGroup(GL.createSequentialGroup()
                .addGroup(GL.createParallelGroup(BASELINE)
                        .addComponent(labelHeSoA)
                        .addComponent(txtHeSoA))
                .addGroup(GL.createParallelGroup(BASELINE)
                        .addComponent(labelHeSoB)
                        .addComponent(txtHeSoB))
                .addGroup(GL.createParallelGroup(BASELINE)
                        .addComponent(panelPhepTinh))
                .addGroup(GL.createParallelGroup(BASELINE)
                        .addComponent(labelKetQua)
                        .addComponent(txtKetQua))
        );

// Setup JPanel Button
        JPanel panelButton = new JPanel();
        panelButton.setLayout(new GridLayout(10,1,10,0));
        panelButton.setBorder(BorderFactory.createTitledBorder("Chọn thao tác"));

//Setup Button
        btnGiai = new JButton("Giải");
        btnXoa = new JButton("Xóa trắng");
        btnThoat = new JButton("Thoát");

//Add Component into JPanel Button
        panelButton.add(btnGiai);
        panelButton.add(btnXoa);
        panelButton.add(btnThoat);

// Setup JPanel
        JPanel panelEnd = new JPanel(new FlowLayout());
        panelEnd.setBackground(Color.decode("#CD6155"));
        panelEnd.setPreferredSize(new Dimension(100,50));

// Add Component into Container
        con.add(panelTitle,BorderLayout.NORTH);
        con.add(panelButton,BorderLayout.WEST);
        con.add(panelContent,BorderLayout.CENTER);
        con.add(panelEnd,BorderLayout.SOUTH);
        pack();
    }

/**
     * Create Event
     */
    private void initListenEvent()
    {
        btnThoat.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            };
        });

btnXoa.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                txtHeSoA.setText("");
                txtHeSoB.setText("");
                txtKetQua.setText("");
                txtHeSoA.setRequestFocusEnabled(true);
            }
        });

btnGiai.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Double A,B,C;
                try {
                    A = Double.parseDouble(txtHeSoA.getText());
                    B = Double.parseDouble(txtHeSoB.getText());

if(radioCong.isSelected())
                    {
                        txtKetQua.setText(""+(A+B));
                    }else if(radioTru.isSelected()){
                        txtKetQua.setText(""+(A-B));
                    }else if(radioNhan.isSelected()){
                        txtKetQua.setText(""+(A*B));
                    }else{
                    txtKetQua.setText(""+(A/B));
                    }

} catch (Exception error)
                {
                    JOptionPane.showMessageDialog(null,"Vui lòng nhập lại","Thông Báo",JOptionPane.INFORMATION_MESSAGE);
                }

}
        });
    }
}

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