Carrinho de compras em Swing

/**
 * 
 */
package br.gui;

import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JDesktopPane;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import java.awt.GridBagConstraints;
import javax.swing.JInternalFrame;
import java.awt.Rectangle;
import java.awt.Insets;
import javax.swing.JLabel;
import javax.swing.SwingConstants;

import br.bean.CarrinhoComprasBean;

/**
 * @author zap
 *
 */
public class CarrinhoComprasInicial extends JFrame {
	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JPanel botoesJPanel = null;
	private JDesktopPane jDesktopPane = null;
	private JButton carrinhoJButton = null;
	private JInternalFrame carrinho01JInternalFrame = null;
	private JPanel carrinho01JContentPane = null;
	private JPanel botoesCarrinho01JPanel = null;
	private JButton botaoAvancarCarrinho01JButton = null;
	private JButton botaoVoltarCarrinho01JButton = null;
	private JLabel infoCarrinho01JLabel = null;
	private JInternalFrame carrinho02JInternalFrame = null;
	private JPanel carrinho02JContentPane = null;
	private JPanel botoesCarrinho02JPanel = null;
	private JButton botaoVoltarCarrinho02JButton = null;
	private JButton botaoAvancarCarrinho02JButton = null;
	private JLabel infoCarrinho02JLabel = null;
	
	private CarrinhoComprasBean carrinhoComprasBean = null;
	private JButton botaoSairCarrinho01JButton = null;
	private JButton botaoSairCarrinho02JButton = null;
	
	/**
	 * This method initializes botoesJPanel	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getBotoesJPanel(){
		if( botoesJPanel == null ){
			GridBagConstraints gridBagConstraints = new GridBagConstraints();
			gridBagConstraints.anchor = GridBagConstraints.CENTER;
			botoesJPanel = new JPanel();
			botoesJPanel.setLayout(new GridBagLayout());
			botoesJPanel.add(getCarrinhoJButton(), gridBagConstraints);
		}
		return botoesJPanel;
	}

	/**
	 * This method initializes jDesktopPane	
	 * 	
	 * @return javax.swing.JDesktopPane	
	 */
	private JDesktopPane getJDesktopPane(){
		if( jDesktopPane == null ){
			jDesktopPane = new JDesktopPane();
			jDesktopPane.add(getCarrinho01JInternalFrame(), null);
			jDesktopPane.add(getCarrinho02JInternalFrame(), null);
		}
		return jDesktopPane;
	}

	/**
	 * This method initializes carrinhoJButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getCarrinhoJButton(){
		if( carrinhoJButton == null ){
			carrinhoJButton = new JButton();
			carrinhoJButton.setText("Carrinho");
			carrinhoJButton.addActionListener( new java.awt.event.ActionListener() {
				public void actionPerformed( java.awt.event.ActionEvent e ){
					System.out.println( "CarrinhoJButton actionPerformed()" ); // TODO Auto-generated Event stub actionPerformed()
					carrinho01JInternalFrame.setVisible( true );
					carrinhoComprasBean = new CarrinhoComprasBean();
				}
			} );
		}
		return carrinhoJButton;
	}

	/**
	 * This method initializes carrinho01JInternalFrame	
	 * 	
	 * @return javax.swing.JInternalFrame	
	 */
	private JInternalFrame getCarrinho01JInternalFrame(){
		if( carrinho01JInternalFrame == null ){
			carrinho01JInternalFrame = new JInternalFrame();
			carrinho01JInternalFrame.setBounds(new Rectangle(89, 63, 609, 415));
			carrinho01JInternalFrame.setTitle("Carrinho Tela 01");
			carrinho01JInternalFrame.setContentPane(getCarrinho01JContentPane());
		}
		return carrinho01JInternalFrame;
	}

	/**
	 * This method initializes carrinho01JContentPane	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getCarrinho01JContentPane(){
		if( carrinho01JContentPane == null ){
			infoCarrinho01JLabel = new JLabel();
			infoCarrinho01JLabel.setText("Primeira tela do carrinho de compras: adicionar itens ao carrinho");
			infoCarrinho01JLabel.setHorizontalAlignment(SwingConstants.CENTER);
			carrinho01JContentPane = new JPanel();
			carrinho01JContentPane.setLayout(new BorderLayout());
			carrinho01JContentPane.add(getBotoesCarrinho01JPanel(), BorderLayout.NORTH);
			carrinho01JContentPane.add(infoCarrinho01JLabel, BorderLayout.CENTER);
		}
		return carrinho01JContentPane;
	}

	/**
	 * This method initializes botoesCarrinho01JPanel	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getBotoesCarrinho01JPanel(){
		if( botoesCarrinho01JPanel == null ){
			GridBagConstraints gridBagConstraints5 = new GridBagConstraints();
			gridBagConstraints5.gridx = 4;
			gridBagConstraints5.gridy = 0;
			GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
			gridBagConstraints2.insets = new Insets(4, 4, 4, 4);
			gridBagConstraints2.gridy = 0;
			gridBagConstraints2.gridx = 3;
			GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
			gridBagConstraints1.gridx = 1;
			gridBagConstraints1.insets = new Insets(4, 4, 4, 4);
			gridBagConstraints1.gridwidth = 2;
			gridBagConstraints1.gridy = 0;
			botoesCarrinho01JPanel = new JPanel();
			botoesCarrinho01JPanel.setLayout(new GridBagLayout());
			botoesCarrinho01JPanel.add(getBotaoAvancarCarrinho01JButton(), gridBagConstraints2);
			botoesCarrinho01JPanel.add(getBotaoVoltarCarrinho01JButton(), gridBagConstraints1);
			botoesCarrinho01JPanel.add(getBotaoSairCarrinho01JButton(), gridBagConstraints5);
		}
		return botoesCarrinho01JPanel;
	}

	/**
	 * This method initializes botaoAvancarCarrinho01JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoAvancarCarrinho01JButton(){
		if( botaoAvancarCarrinho01JButton == null ){
			botaoAvancarCarrinho01JButton = new JButton();
			botaoAvancarCarrinho01JButton.setText("Avancar");
			botaoAvancarCarrinho01JButton.addActionListener( new java.awt.event.ActionListener() {
				public void actionPerformed( java.awt.event.ActionEvent e ){
					carrinho01JInternalFrame.setVisible( false );
					carrinho02JInternalFrame.setVisible( true );
					System.out.println( "BotaoAvancarCarrinho01JButton actionPerformed()" ); // TODO Auto-generated Event stub actionPerformed()
				}
			} );
		}
		return botaoAvancarCarrinho01JButton;
	}

	/**
	 * This method initializes botaoVoltarCarrinho01JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoVoltarCarrinho01JButton(){
		if( botaoVoltarCarrinho01JButton == null ){
			botaoVoltarCarrinho01JButton = new JButton();
			botaoVoltarCarrinho01JButton.setText("Voltar");
			botaoVoltarCarrinho01JButton.setEnabled(false);
		}
		return botaoVoltarCarrinho01JButton;
	}

	/**
	 * This method initializes carrinho02JInternalFrame	
	 * 	
	 * @return javax.swing.JInternalFrame	
	 */
	private JInternalFrame getCarrinho02JInternalFrame(){
		if( carrinho02JInternalFrame == null ){
			carrinho02JInternalFrame = new JInternalFrame();
			carrinho02JInternalFrame.setBounds(new Rectangle(89, 63, 609, 415));
			carrinho02JInternalFrame.setTitle("Carrinho Tela 02");
			carrinho02JInternalFrame.setContentPane(getCarrinho02JContentPane());
		}
		return carrinho02JInternalFrame;
	}

	/**
	 * This method initializes carrinho02JContentPane	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getCarrinho02JContentPane(){
		if( carrinho02JContentPane == null ){
			infoCarrinho02JLabel = new JLabel();
			infoCarrinho02JLabel.setText("Segunda tela do carrinho de compras: informar formas de pagamento");
			infoCarrinho02JLabel.setHorizontalAlignment(SwingConstants.CENTER);
			carrinho02JContentPane = new JPanel();
			carrinho02JContentPane.setLayout(new BorderLayout());
			carrinho02JContentPane.add(getBotoesCarrinho02JPanel(), BorderLayout.NORTH);
			carrinho02JContentPane.add(infoCarrinho02JLabel, BorderLayout.CENTER);
		}
		return carrinho02JContentPane;
	}

	/**
	 * This method initializes botoesCarrinho02JPanel	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getBotoesCarrinho02JPanel(){
		if( botoesCarrinho02JPanel == null ){
			GridBagConstraints gridBagConstraints6 = new GridBagConstraints();
			gridBagConstraints6.gridx = 2;
			gridBagConstraints6.gridy = 0;
			GridBagConstraints gridBagConstraints4 = new GridBagConstraints();
			gridBagConstraints4.insets = new Insets(4, 4, 4, 4);
			GridBagConstraints gridBagConstraints3 = new GridBagConstraints();
			gridBagConstraints3.gridx = 1;
			gridBagConstraints3.insets = new Insets(4, 4, 4, 4);
			gridBagConstraints3.gridy = 0;
			botoesCarrinho02JPanel = new JPanel();
			botoesCarrinho02JPanel.setLayout(new GridBagLayout());
			botoesCarrinho02JPanel.add(getBotaoVoltarCarrinho02JButton(), gridBagConstraints4);
			botoesCarrinho02JPanel.add(getBotaoAvancarCarrinho02JButton(), gridBagConstraints3);
			botoesCarrinho02JPanel.add(getBotaoSairCarrinho02JButton(), gridBagConstraints6);
		}
		return botoesCarrinho02JPanel;
	}

	/**
	 * This method initializes botaoVoltarCarrinho02JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoVoltarCarrinho02JButton(){
		if( botaoVoltarCarrinho02JButton == null ){
			botaoVoltarCarrinho02JButton = new JButton();
			botaoVoltarCarrinho02JButton.setText("Voltar");
			botaoVoltarCarrinho02JButton.addActionListener( new java.awt.event.ActionListener() {
				public void actionPerformed( java.awt.event.ActionEvent e ){
					carrinho01JInternalFrame.setVisible( true );
					carrinho02JInternalFrame.setVisible( false );
					System.out.println( "BotaoVoltarCarrinho02JButton actionPerformed()" ); // TODO Auto-generated Event stub actionPerformed()
				}
			} );
		}
		return botaoVoltarCarrinho02JButton;
	}

	/**
	 * This method initializes botaoAvancarCarrinho02JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoAvancarCarrinho02JButton(){
		if( botaoAvancarCarrinho02JButton == null ){
			botaoAvancarCarrinho02JButton = new JButton();
			botaoAvancarCarrinho02JButton.setText("Avancar");
			botaoAvancarCarrinho02JButton.setEnabled(false);
		}
		return botaoAvancarCarrinho02JButton;
	}

	/**
	 * This method initializes botaoSairCarrinho01JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoSairCarrinho01JButton(){
		if( botaoSairCarrinho01JButton == null ){
			botaoSairCarrinho01JButton = new JButton();
			botaoSairCarrinho01JButton.setText("Sair");
			botaoSairCarrinho01JButton.addActionListener( new java.awt.event.ActionListener() {
				public void actionPerformed( java.awt.event.ActionEvent e ){
					System.out.println( "BotaoSairCarrinho01JButton actionPerformed()" ); // TODO Auto-generated Event stub actionPerformed()
					sairCarrinhoCompras();
				}
			} );
		}
		return botaoSairCarrinho01JButton;
	}

	/**
	 * This method initializes botaoSairCarrinho02JButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBotaoSairCarrinho02JButton(){
		if( botaoSairCarrinho02JButton == null ){
			botaoSairCarrinho02JButton = new JButton();
			botaoSairCarrinho02JButton.setText("Sair");
			botaoSairCarrinho02JButton.addActionListener( new java.awt.event.ActionListener() {
				public void actionPerformed( java.awt.event.ActionEvent e ){
					System.out.println( "BotaoSairCarrinho02JButton actionPerformed()" ); // TODO Auto-generated Event stub actionPerformed()
					sairCarrinhoCompras();
				}
			} );
		}
		return botaoSairCarrinho02JButton;
	}
	
	private void sairCarrinhoCompras(){
		carrinhoComprasBean = null;
		carrinho01JInternalFrame.dispose();
		carrinho02JInternalFrame.dispose();
		
	}
	
	/**
	 * @param args
	 */
	public static void main( String[] args ){
		// TODO Auto-generated method stub
		SwingUtilities.invokeLater( new Runnable() {
			public void run(){
				CarrinhoComprasInicial thisClass = new CarrinhoComprasInicial();
				thisClass.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
				thisClass.setVisible( true );
			}
		} );
	}
	
	/**
	 * This is the default constructor
	 */
	public CarrinhoComprasInicial(){
		super();
		initialize();
	}
	
	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize(){
		this.setSize( 800, 600 );
		this.setContentPane( getJContentPane() );
		this.setTitle("Carrinho de Compras");
	}
	
	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane(){
		if( jContentPane == null ){
			jContentPane = new JPanel();
			jContentPane.setLayout( new BorderLayout() );
			jContentPane.add(getBotoesJPanel(), BorderLayout.NORTH);
			jContentPane.add(getJDesktopPane(), BorderLayout.CENTER);
		}
		return jContentPane;
	}
}

/**
 * 
 */
package br.bean;

import java.util.Date;
import java.util.List;

/**
 * @author zap
 *
 */
public class CarrinhoComprasBean {
	
	private Long id;
	private Date data;
	private List<ItemCarrinhoCompras> listaItens;
	
	public CarrinhoComprasBean(){
		super();
		this.id = null;
		this.data = null;
		this.listaItens = null;
	}

	public CarrinhoComprasBean( Long id, Date data, List<ItemCarrinhoCompras> listaItens ){
		super();
		this.id = id;
		this.data = data;
		this.listaItens = listaItens;
	}
	
}

/**
 * 
 */
package br.bean;

/**
 * @author zap
 * 
 */
public class ItemCarrinhoCompras {
	private Long id;
	private String descricao;
	private Double preco;
	private Double quantidade;
	
	public ItemCarrinhoCompras(){
		super();
		this.id = null;
		this.descricao = null;
		this.preco = null;
		this.quantidade = null;
	}
	
	public ItemCarrinhoCompras( Long id, String descricao, Double preco, Double quantidade ){
		super();
		this.id = id;
		this.descricao = descricao;
		this.preco = preco;
		this.quantidade = quantidade;
	}
}