BoxLayout, panel, et alignement

Bonsoir,
voici mon problème :
j'ai mon IHM, j'ai un BoxLayout vertical qui contient mes 8 panels dans lesquelles je met d'autre BoxLayout soit horizontal soit vertical...
Mais impossible de placer mes composants à gauche !
Voici mon code :
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class MaFenetre {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		Dimension tailleEcran = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
		int hauteur = (int)tailleEcran.getHeight();

		// TODO Auto-generated method stub
		JFrame mafenetre = new JFrame();
		mafenetre.setTitle("Plateforme de suivi au sol d'expériences embarquées dans des ballons et des fusées"); 
		mafenetre.setSize(500,hauteur-50); 
		mafenetre.setLocationRelativeTo(null); 
		mafenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		JPanel pan1 = new JPanel();
		JPanel pan2 = new JPanel();
		JPanel pan3 = new JPanel();
		JPanel pan4 = new JPanel();
		JPanel pan5 = new JPanel();
		JPanel pan6 = new JPanel();
		JPanel pan7 = new JPanel();
		JPanel pan8 = new JPanel();
		
		
		pan1.setBorder(BorderFactory.createTitledBorder("Nom de l'expérience"));
		pan2.setBorder(BorderFactory.createTitledBorder("Type d'expérience"));
		pan3.setBorder(BorderFactory.createTitledBorder("Nom de l'établissement"));
		pan4.setBorder(BorderFactory.createTitledBorder("Niveau de satisfaction"));
		pan5.setBorder(BorderFactory.createTitledBorder("Vos coordonnées"));
		pan6.setBorder(BorderFactory.createTitledBorder("Remarques éventuelles (bugs, amélioration souhaitées, etc...)"));
		pan7.setBorder(BorderFactory.createTitledBorder("Envoyer les résultats"));
		pan8.setBorder(BorderFactory.createTitledBorder("Date et heure de lancement"));
		
		//pan1.setAlignmentX(Component.LEFT_ALIGNMENT);
		
		/*mafenetre.add(pan1);
		mafenetre.add(pan2);
		mafenetre.add(pan3);
		mafenetre.add(pan4);
		mafenetre.add(pan5);
		mafenetre.add(pan6);
		mafenetre.add(pan7);*/

		/*mafenetre.setLayout(new GridLayout(7,1));
        
        mafenetre.getContentPane().add(pan1);
        mafenetre.getContentPane().add(pan2);
        mafenetre.getContentPane().add(pan3);
        mafenetre.getContentPane().add(pan4);
        mafenetre.getContentPane().add(pan5);
        mafenetre.getContentPane().add(pan6);
        mafenetre.getContentPane().add(pan7);*/
		
		Box hbox1 = Box.createVerticalBox();
		hbox1.setAlignmentX(Component.LEFT_ALIGNMENT);
		mafenetre.add(hbox1);
		
		hbox1.add(pan1);
		hbox1.add(pan2);
		hbox1.add(pan3);
		hbox1.add(pan8);
		hbox1.add(pan4);
		hbox1.add(pan5);
		hbox1.add(pan6);
		hbox1.add(pan7);
		 
        // Dans le panneau 1
		Box hbox2 = Box.createHorizontalBox();
		hbox2.setAlignmentX(Component.LEFT_ALIGNMENT);
        JTextField txt1 = new JTextField("experience_date_heure");
        pan1.add(hbox2);
        hbox2.add(txt1);
        
        // Dans le panneau 2
        Box hbox6 = Box.createVerticalBox();
        hbox6.setAlignmentX(Component.LEFT_ALIGNMENT);
        
        JRadioButton radio4 = new JRadioButton("Ballon");
        JRadioButton radio5 = new JRadioButton("Fusée expérimentale");
        JRadioButton radio6 = new JRadioButton("Minifusée");
        JRadioButton radio7 = new JRadioButton("Autre");
        
        //JTextField txt2 = new JTextField("Précisez ici");
        pan2.add(hbox6);
        hbox6.add(radio4);
        hbox6.add(radio5);
        hbox6.add(radio6);
        hbox6.add(radio7);
        
        // Dans le panneau 3
        Box hbox7 = Box.createHorizontalBox();
        
        pan3.add(hbox7);
        
        JTextField txt9 = new JTextField(10);
        String[] etab = {"Club", "Ecole primaire", "Collège", "Lycée", "Université", "Autre"};
        JComboBox combo1 = new JComboBox(etab);
        hbox7.add(combo1);
        hbox7.add(txt9);
        
        // Dans le panneau 8
        Box hbox10 = Box.createHorizontalBox();
        
        pan8.add(hbox10);
        
        String[] jour = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31"};
        String[] mois = {"Janvier", "Février", "Mars", "Avril", "Mai", "Juin", "Juillet", "Août", "Septembre", "Octobre" , "Novembre", "Décembre"};
        String[] annee = {"2010", "2011", "2012", "2013", "2014", "2015", "2016", "2017", "2018", "2019", "2020"};
        String[] heure = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "00"};
        String[] minutes = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59"};
        
        JLabel lab8 = new JLabel("Le ");
        JLabel lab9 = new JLabel(" à ");
        JLabel lab10 = new JLabel(" heures ");
        JLabel lab11 = new JLabel(" minutes ");
        
        JComboBox combo2 = new JComboBox(jour);
        JComboBox combo3 = new JComboBox(mois);
        JComboBox combo4 = new JComboBox(annee);
        JComboBox combo5 = new JComboBox(heure);
        JComboBox combo6 = new JComboBox(minutes);
        
        hbox10.add(lab8);
        hbox10.add(combo2);
        hbox10.add(combo3);
        hbox10.add(combo4);
        hbox10.add(lab9);
        hbox10.add(combo5);
        hbox10.add(lab10);
        hbox10.add(combo6);
        hbox10.add(lab11);
        
        
        
        // Dans le panneau 4
        Box hbox3 = Box.createVerticalBox();
        
        JRadioButton radio1 = new JRadioButton("Pas satisfait");
        JRadioButton radio2 = new JRadioButton("Satisfait");
        JRadioButton radio3 = new JRadioButton("Très satisfait");
        
        pan4.add(hbox3);
        
        hbox3.add(radio1);
        hbox3.add(radio2);
        hbox3.add(radio3);
        
        // Dans le panneau 5
        Box hbox4 = Box.createVerticalBox();
        
        JTextField txt2 = new JTextField(10);
        JTextField txt3 = new JTextField(10);
        JTextField txt4 = new JTextField(10);
        JTextField txt5 = new JTextField(5);
        JTextField txt6 = new JTextField(7);
        JTextField txt7 = new JTextField(10);
        JTextField txt8 = new JTextField(10);
        
        JLabel lab1 = new JLabel("Nom");
        JLabel lab2 = new JLabel("Prénom");
        JLabel lab3 = new JLabel("Adresse");
        JLabel lab4 = new JLabel("Code postal");
        JLabel lab5 = new JLabel("Ville");
        JLabel lab6 = new JLabel("Téléphone");
        JLabel lab7 = new JLabel("Email");
        
        pan5.add(hbox4);
            
        hbox4.add(lab1);
        hbox4.add(txt2);
        hbox4.add(lab2);
        hbox4.add(txt3);
        hbox4.add(lab3);
        hbox4.add(txt4);
        hbox4.add(lab4);
        hbox4.add(txt5);
        hbox4.add(lab5);
        hbox4.add(txt6);
        hbox4.add(lab6);
        hbox4.add(txt7);
        hbox4.add(lab7);
        hbox4.add(txt8);
        
        // Dans le panneau 6
        JTextArea area1 = new JTextArea();
        pan6.setLayout(new BorderLayout());
        pan6.add(area1, BorderLayout.CENTER);
        
        // Dans le panneau 7
        JButton button1 = new JButton("Envoyer !");
        //pan7.setLayout(new BorderLayout());
        Box hbox5 = Box.createHorizontalBox();
        pan7.add(hbox5);
        hbox5.setAlignmentX(Component.LEFT_ALIGNMENT);
        hbox5.add(button1);
        //pan7.add(button1, BorderLayout.CENTER);
        
        mafenetre.setVisible(true);

	}

}
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