import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class JCheckbox_test extends JFrame implements ActionListener {
    JCheckBox jCheckBox1 = new JCheckBox("");
    JCheckBox jCheckBox2 = new JCheckBox("");
    JTextArea jTextArea1 = new JTextArea();
    JCheckBox jCheckBox3 = new JCheckBox("");
    JButton jButton1 = new JButton("ȷ  ");
 public JCheckbox_test() { 
        setLayout(null); 
        jCheckBox1.setBounds(27, 27, 59, 25); 
        jTextArea1.setBounds(120, 28, 84, 84);
        jCheckBox3.setSelected(true); 
        jCheckBox3.setBounds(27, 91, 60, 20);
        jButton1.addActionListener(this);
        setTitle("ѡ");
        add(jCheckBox1);
        jButton1.setBounds(70, 128, 90, 33); 
        add(jCheckBox2);
        add(jCheckBox3);
        add(jTextArea1);
        add(jButton1); 
        jCheckBox2.setBounds(27, 60, 59, 26);
    }
 public static void main(String args[]) {
        JCheckbox_test ta = new JCheckbox_test();
        ta.setBounds(200, 300, 250, 200);
        ta.validate();
        ta.setVisible(true);
    }
public void actionPerformed(ActionEvent e) {
        jTextArea1.setText("");
        if (jCheckBox1.isSelected())
            jTextArea1.append(jCheckBox1.getText());
        if (jCheckBox2.isSelected())
            jTextArea1.append(jCheckBox2.getText());
        if (jCheckBox3.isSelected())
            jTextArea1.append(jCheckBox3.getText());
    }
}
