Java GUI

Assuntos Gerais
#1

Amigos estou com algumas dúvidas com layouts no java;
Considerem o seguinte estou usado o Eclipse Kepler.

Não consigo visualizar componentes adicionados no FormLayout e nem no MidLayout veja o exemplo abaixo;

package com.gercom.views;

import java.awt.BorderLayout;

public class Clientes extends JFrame {

private JPanel panel1, panel2, panel3;
private JTextField nom;
private JLabel a;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
private JTextField textField_4;
private JTextField textField_5;

/**
 * Launch the application.
 */
public static void main(String[] args) {

    new Clientes();
}

/**
 * Create the frame.
 */
public Clientes() {
	super("Cadastro de Clientes");
	
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(463, 320);
    setVisible(true);
    setResizable(false);
    getContentPane().setLayout(new FormLayout(new ColumnSpec[] {
    		FormFactory.RELATED_GAP_COLSPEC,
    		ColumnSpec.decode("53px"),
    		FormFactory.RELATED_GAP_COLSPEC,
    		ColumnSpec.decode("300px:grow"),},
    	new RowSpec[] {
    		RowSpec.decode("31px"),
    		RowSpec.decode("20px"),
    		FormFactory.RELATED_GAP_ROWSPEC,
    		RowSpec.decode("20px"),
    		FormFactory.RELATED_GAP_ROWSPEC,
    		RowSpec.decode("20px"),
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,
    		FormFactory.RELATED_GAP_ROWSPEC,
    		FormFactory.DEFAULT_ROWSPEC,}));
    
    JLabel lblNewLabecl = new JLabel("C\u00F3d. :");
    getContentPane().add(lblNewLabecl, "2, 2, right, center");
    
    textField = new JTextField();
    textField.setVisible(true);
    getContentPane().add(textField, "4, 2, left, top");
    textField.setColumns(10);
    
    JLabel lblNewLabel = new JLabel("Nome :");
    getContentPane().add(lblNewLabel, "2, 4, right, center");
    
    textField_1 = new JTextField();
    getContentPane().add(textField_1, "4, 4, fill, top");
    textField_1.setColumns(10);
    
    JLabel lblNewLabel_1 = new JLabel("Endere\u00E7o :");
    getContentPane().add(lblNewLabel_1, "2, 6, right, center");
    
    textField_2 = new JTextField();
    getContentPane().add(textField_2, "4, 6, fill, top");
    textField_2.setColumns(10);
    
    JLabel lblBairro = new JLabel("Bairro :");
    getContentPane().add(lblBairro, "2, 8, right, default");
    
    textField_4 = new JTextField();
    textField_4.setText("");
    getContentPane().add(textField_4, "4, 8, fill, default");
    textField_4.setColumns(10);
    
    JLabel lblCidade = new JLabel("Cidade :");
    getContentPane().add(lblCidade, "2, 10, right, default");
    
    textField_5 = new JTextField();
    getContentPane().add(textField_5, "4, 10, fill, default");
    textField_5.setColumns(10);
    
    JLabel lblEstado = new JLabel("Estado :");
    getContentPane().add(lblEstado, "2, 12, left, default");
    
    textField_3 = new JTextField();
    getContentPane().add(textField_3, "4, 12, fill, default");
    textField_3.setColumns(10);
    
    JButton btnNewButton = new JButton("New button");
    getContentPane().add(btnNewButton, "4, 18, left, default");
    
    JButton btnNewButton_1 = new JButton("New button");
    getContentPane().add(btnNewButton_1, "4, 20, left, default");
    
	
}

}

#2

Coloque seus códigos entre a tag Code, fica mais fácil de nós visualizarmos e te ajudar

#3