Here is an example of creating frame and display swing components on it.

import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class SwingFrame{
public static void main(String[] args) throws Exception{
SwingFrame sf=new SwingFrame();
}

public SwingFrame(){
JFrame f = new JFrame("Frame in Java Swing");
f.getContentPane().setLayout(null);
JLabel lbl1 = new JLabel("Name");
final JTextField jt1=new JTextField(15);
JLabel lbl2 = new JLabel("Address");
final JPasswordField jt2=new JPasswordField(15);
JLabel lbl3 = new JLabel("Contact No");
final JPasswordField jt3=new JPasswordField(15);
JLabel lbl4 = new JLabel("Gender");
final JRadioButton Male,Female;
ButtonGroup radioGroup=new ButtonGroup();
Male=new JRadioButton("Male");
radioGroup.add(Male);
Female=new JRadioButton("Female");
radioGroup.add(Female);
JButton button=new JButton("Submit");
lbl1.setBounds(50,50,70,20);
lbl2.setBounds(50,90,70,20);
lbl3.setBounds(50,130,70,20);
lbl4.setBounds(50,170,70,20);
button.setBounds(50,210,100,20);
jt1.setBounds(150,50,100,20);
jt2.setBounds(150,90,100,20);
jt3.setBounds(150,130,100,20);
Male.setBounds(150,170,100,20);
Female.setBounds(250,170,100,20);

f.add(lbl1);
f.add(lbl2);
f.add(lbl3);
f.add(lbl4);
f.add(jt1);
f.add(jt2);
f.add(jt3);
f.add(Male);
f.add(Female);
f.add(button);
f.setSize(500,500);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}