Imagem no Jframe

package br.teste;

import java.awt.Color;
import java.awt.Image;
import java.awt.Toolkit;

import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

import javax.swing.JLabel;
import javax.swing.JTextField;


import br.com.bradseg.webtran.recursos.Constantes;
import br.com.bradseg.webtran.view.recursos.campos.Campos;
import javax.swing.JPasswordField;

public class Principal extends JFrame implements ActionListener{

	private static final long serialVersionUID = 1L;
	
	private JPanel jContentPane = null;

	private JLabel jLabel = null;

	private JLabel jLabel1 = null;

	private JLabel jLabel2 = null;

	private JLabel jLabel3 = null;
	
	 private JLabel jLabelLogoMarca   = new JLabel();
	 
	 public static final Color COLOR = new Color(Constantes.NUM_225, Constantes.NUM_45, Constantes.NUM_45);  //  @jve:decl-index=0:

	private JPasswordField jPasswordField = null;

	private JTextField jTextField = null;

	private JButton jButton;

	private JLabel jLabel4 = null;

	private JLabel jLabel5 = null;

	private JLabel jLabel6 = null;

	private JButton jButton1 = null;

	private JLabel jLabel7 = null;

	
	public Principal() throws IOException {
		super();
		initialize();
		
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		this.setSize(1024, 668);
		this.setContentPane(getJContentPane());
		this.setTitle("Bradesco Seguros e Previdência");

	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
				
		if (jContentPane == null) {
			jLabel7 = new JLabel();
			jLabel7.setBounds(new Rectangle(7, 295, 119, 25));
			jLabel7.setText(":: Mais informações");
			jLabel6 = new JLabel();
			jLabel6.setBounds(new Rectangle(21, 220, 221, 27));
			jLabel6.setText("Acesse com seu Certificado Digital");
			jLabel5 = new JLabel();
			jLabel5.setBounds(new Rectangle(5, 194, 154, 23));
			jLabel5.setText(":: Não possuo senha");
			jLabel4 = new JLabel();
			jLabel4.setBounds(new Rectangle(7, 168, 153, 23));
			jLabel4.setText("::Esqueci minha senha");
			jLabel3 = new JLabel();
			jLabel3.setBounds(new Rectangle(8, 27, 237, 16));
			jLabel3.setText("com a Bradesco Seguros e Previdência");
			
			jLabel2 = new JLabel();
			jLabel2.setBounds(new Rectangle(48, 1, 141, 24));
			jLabel2.setText("JÁ TRABALHO");
			
			jLabel1 = new JLabel();
			jLabel1.setBounds(new Rectangle(6, 64, 151, 16));
			jLabel1.setText("CPF ou CNPJ ou MATRIZ:");
			
			jLabel = new JLabel();
			jLabel.setBounds(new Rectangle(5, 113, 67, 16));
			jLabel.setText("SENHA:");
			
		
			jContentPane = new JPanel();
			jContentPane.setBorder(BorderFactory.createTitledBorder(""));
		
			jContentPane.setLayout(null);
			jContentPane.add(jLabel, null);
			jContentPane.add(jLabel1, null);
			jContentPane.add(jLabel2, null);
			jContentPane.add(jLabel3, null);
				
			jContentPane.add(getJPasswordField(), null);
			jContentPane.add(getJTextField(), null);
			jContentPane.add(getJButton(), null);
			jContentPane.add(jLabel4, null);
			jContentPane.add(jLabel5, null);
			jContentPane.add(jLabel6, null);
			jContentPane.add(getJButton1(), null);
			jContentPane.add(jLabel7, null);
			
			jLabel2.setFont(new java.awt.Font("Times New Roman", 1, 18)); 
			
			jLabel1.setFont(new java.awt.Font("Times New Roman", 1, 12)); 
			jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
			jLabel1.setForeground(new java.awt.Color(255, 255, 255)); 
			
			jLabel.setFont(new java.awt.Font("Times New Roman", 1, 12)); 
			jLabel.setForeground(new java.awt.Color(255, 255, 255)); //cor branca
			
			jLabel6.setForeground(new java.awt.Color(255, 255, 255)); //cor branca
			jLabel2.setForeground(new java.awt.Color(255, 255, 255)); //cor branca
			jLabel3.setForeground(new java.awt.Color(255, 255, 255)); //cor branca
			
			
			jLabel5.setForeground(new java.awt.Color(255, 0, 0)); //cor vermelha
			jLabel4.setForeground(new java.awt.Color(255, 0, 0)); 
			jLabel7.setForeground(new java.awt.Color(255, 0, 0)); 
			
			 // centraliza a janela  
		    setLocationRelativeTo(null);
		    
		    // Evita que a JFrame seja redimensionada
		    this.setResizable(false); 

			 // Define a cor de fundo
			 jContentPane.setBackground(Color.GRAY);

			 this.setSize(350, 250);
			 setVisible(true);
			 jLabelLogoMarca.setOpaque(true);
		 
		}
		return jContentPane;
	}
	
	  public void actionPerformed(ActionEvent ae)
		{
			String value1=jTextField.getText();
			String value2=jPasswordField.getText();
	        if (value1.equals("stefanini") && value2.equals("stefanini")) {
			NextPage page=new NextPage();
			page.setVisible(true);
	        limpaCampos(); 
		}
			else{
				limpaCampos(); 
				JOptionPane.showMessageDialog(this,"Entre com uma Login e Senha válidos!","Erro",JOptionPane.ERROR_MESSAGE);
		}
	}
	  
		
	   private void limpaCampos(){  
		   jTextField.setText("");  
		   jPasswordField.setText("");  
	    }  
	   

	
	/**
 * This method initializes jPasswordField	
 * 	
 * @return javax.swing.JPasswordField	
 */
private JPasswordField getJPasswordField() {
	if (jPasswordField == null) {
		jPasswordField = new JPasswordField();
		jPasswordField.setBounds(new Rectangle(4, 139, 86, 20));
	}
	return jPasswordField;
}

	/**
	 * This method initializes jTextField	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	private JTextField getJTextField() {
		if (jTextField == null) {
			jTextField = new JTextField();
			jTextField.setBounds(new Rectangle(4, 85, 184, 20));
		}
		return jTextField;
	}

	/**
	 * This method initializes jButton	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getJButton() {
		if (jButton == null) {
			jButton = new JButton();
			jButton.setBounds(new Rectangle(95, 138, 56, 22));
			jButton.setText("OK");
			jButton.addActionListener(this);
		}
		return jButton;
	}

	

	/**
	 * This method initializes jButton1	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getJButton1() {
		if (jButton1 == null) {
			jButton1 = new JButton();
			jButton1.setBounds(new Rectangle(6, 250, 240, 34));
			jButton1.setText("Certificado Digital");
		}
		return jButton1;
	}

	public static void main(String arg[])
	{
		try
		{
		Principal frame=new Principal();
		frame.setSize(800,400);
		frame.setBackground(getColor());
		frame.setVisible(true);		
		frame.setIconImage(ImageIO.read(frame.getClass().getResource(Campos.IMG_ICON)));
		
		//imagem
		Image i = Toolkit.getDefaultToolkit().getImage(frame.getClass().getResource(Campos.IMG_LOGOMARCA));
		frame.setImageIcon(i);

		
		
		}
	catch(Exception e)
		{JOptionPane.showMessageDialog(null, e.getMessage());}
	}
	
	  private void setImageIcon(Image i) {
		// TODO Auto-generated method stub
		
	}

	public JLabel getJLabelLogoMarca() {
			return jLabelLogoMarca;
		}
	  
	   public static Color getColor() {
			return COLOR;
		}
	   

}