JCheckBox(){
 JFrame f= new JFrame("CheckBox Example");
    JCheckBox checkBox1 = new JCheckBox("c++");
    checkBox1.setBounds(100,100, 50,50);
    JCheckBox checkBox2 = new JCheckBox();
    checkBox2.setBounds(100,150, 50,50);
    f.add(checkBox1);
    f.add(checkBox2);
    f.setSize(400,400);
    f.setLayout(null);
    f.setVisible(true);
}
public static void main(String[] args) {
   new JCheckBox();
}