Java Swings tutorial with example

In this example , I have taken Java swings components like Jpanel, JFrame, JButton, JRadioButton , JCheckBox, JCombobox and Jlabel.This is an simple registration form.

import javax.swing.*;

import java.awt.FlowLayout;
import java.awt.event.*;
public class MainClass extends JFrame  {
MainClass()
{
	JPanel jp=new JPanel();
	addcomponent(jp);
	this.add(jp);
	setSize(850,850);
	setVisible(true);
}
private static void addcomponent(JPanel jpn)
{
	jpn.setLayout(null);
	JLabel jl1=new JLabel("User Name");
	jl1.setBounds(20,30,100,20);
	jpn.add(jl1);
	
	JTextField jt1=new JTextField();
	jt1.setBounds(120,30,80,20);
	jpn.add(jt1);
	
	JLabel jl2=new JLabel("Password");
	jl2.setBounds(20,70,100,20);
	jpn.add(jl2);
	
	JPasswordField jt2=new JPasswordField();
	jt2.setBounds(120,70,80,20);
	jpn.add(jt2);
	
	
	
	
	JLabel jlh1=new JLabel("Hobbies");
	jlh1.setBounds(20,160,100,20);
	jpn.add(jlh1);
	
	JCheckBox jcb=new JCheckBox("Reading", true);
	
	jcb.setBounds(130,160,200,20);
	JCheckBox jcb1=new JCheckBox("Writing");
	jcb1.setBounds(240,160,200,20);
	
	jpn.add(jcb1);
	jpn.add(jcb);
	
	
	//RadioButtons
	JLabel jlg1=new JLabel("Gender");
	jlg1.setBounds(20,190,100,20);
	jpn.add(jlg1);
	
	JRadioButton jrb1=new JRadioButton("Male");
	jrb1.setBounds(130,190,100,20);
	jpn.add(jrb1);
	
	JRadioButton jrb2=new JRadioButton("Female");
	jrb2.setBounds(240,190,100,20);
	jpn.add(jrb2);
	
	ButtonGroup bg=new ButtonGroup();
	bg.add(jrb1);
	bg.add(jrb2);
	
	//Combo Box
	
	JLabel jlstate=new JLabel("State");
	jlstate.setBounds(20,210,100,20);
	jpn.add(jlstate);
	
	String[] state={"Rajasthan","UP","MP"};
	JComboBox jcombo=new JComboBox(state);
    jcombo.setBounds(130,210,100,20);
    jpn.add(jcombo);
    
    JButton jb=new JButton("Register Me");
	jb.setBounds(130,240,130,30);
	jpn.add(jb);
	
	
}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
MainClass obj=new MainClass();
	}

}

Output

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