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Java Swing Alignment problem with BoxLayout

I have three components inside a top to down boxLayout (JLabel, JTextField, JButton). The problem is that when i set the X alignment for the label it looks as if i would've changed the X alignment of the button and vice versa, only when both have the same alignment it works fine.
When the screen gets wider both components take a weird alignment.
when both components have the same alignment everything works fine.
here is my code:
public void create(){
JPanel panel = new JPanel();
BoxLayout boxLayout = new BoxLayout(panel, BoxLayout.Y_AXIS);
panel.setLayout(boxLayout);
panel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
JLabel etiqueta = new JLabel("Numero de consultorio: ");
etiqueta.setBackground(Color.BLUE);
etiqueta.setOpaque(true);
etiqueta.setAlignmentX(Component.LEFT_ALIGNMENT);
panel.add(etiqueta);
JTextField consultorio = new JTextField();
panel.add(consultorio);
JButton registrar = new JButton("Registrar");
registrar.setAlignmentX(Component.LEFT_ALIGNMENT);
panel.add(registrar);
this.getContentPane().add(panel, BorderLayout.CENTER);
}

Here is the proposed by Andrew Thompson solution:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
public class TestFrame {
public static void main(String[] args) {
SwingUtilities.invokeLater(new TestFrame()::create);
}
private void create() {
JPanel panel = new JPanel();
BoxLayout boxLayout = new BoxLayout(panel, BoxLayout.Y_AXIS);
panel.setLayout(boxLayout);
panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JLabel etiqueta = new JLabel("Numero de consultorio: ");
etiqueta.setBackground(Color.BLUE);
etiqueta.setOpaque(true);
JPanel layout = new JPanel(new FlowLayout(FlowLayout.LEADING, 0, 0));
layout.add(etiqueta);
panel.add(layout);
JTextField consultorio = new JTextField();
panel.add(consultorio);
JButton registrar = new JButton("Registrar");
layout = new JPanel(new FlowLayout(FlowLayout.TRAILING, 0, 0));
layout.add(registrar);
panel.add(layout);
JFrame frm = new JFrame("Test");
frm.getContentPane().add(panel, BorderLayout.CENTER);
frm.pack();
frm.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frm.setLocationRelativeTo(null);
frm.setVisible(true);
}
}

How to add a JButton to a JFrame?

I tried to add a button to the JFrame, but it won't appear for some reason. How do I make it appear?
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import javax.swing.BorderFactory;
import java.awt.Color;
import java.awt.Container;
import java.awt.Rectangle;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.*;
public class GraficoconArreglo extends javax.swing.JFrame {
JPanel pan = (JPanel) this.getContentPane();
JLabel []lab = new JLabel[6];
JTextField []text = new JTextField[6];
Border border = BorderFactory.createLineBorder(Color.pink,1);
JButton b = new JButton("Calculate");
public GraficoconArreglo() {
initComponents();
pan.setLayout(null);
pan.setBackground(Color.GRAY);
for(int i=0; i<lab.length ;i++){
lab[i] = new JLabel();
text[i] = new JTextField();
lab[i].setBounds(new Rectangle(15,(i+1)*40, 60, 25));
lab[i].setText("Data " + (i+1));
lab[i].setBorder(border);
text[i].setBounds(new Rectangle(100,(i+1)*40, 60, 25));
pan.add(lab[i],null);
pan.add(text[i],null);
setSize(200,330);
setTitle("Arrays in forums.");
add(b);
b.addActionListener((ActionListener) this);
}
}

You are creating only one button and adding it to 6 different places. Therefore, you only would see it on the last place you added.

You should add the button to the contentPane, not the JFrame. A working code for this, provided from SwingDesigner from Eclipse Marketplace would be:
public class Window extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Window frame = new Window();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Window() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(null);
setContentPane(contentPane);
JButton btnNewButton = new JButton("New button");
btnNewButton.setBounds(170, 110, 89, 23);
contentPane.add(btnNewButton);
}
}

Issues with ScrollBar and JTable selection

Issues:
Need the scrollbar to increase to the panel height even when maximized.
When clicked on 1 or 2, need to change the selection color to some other color.
When clicked on 'x', the font should change.
Code:
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.EventQueue;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import javax.swing.border.MatteBorder;
import javax.swing.table.DefaultTableModel;
import java.awt.Color;
import javax.swing.border.CompoundBorder;
import java.awt.Dimension;
public class Sample1 extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Sample1 frame = new Sample1();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Sample1() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
final JPanel panel = new JPanel();
panel.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
contentPane.add(panel, BorderLayout.WEST);
Vector str = new Vector<>();
Vector v = new Vector();
v.add("1");
v.add("x");
Vector v1 = new Vector();
v1.add("2");
v1.add("x");
str.addElement(v);
str.addElement(v1);
DefaultTableModel mo = new DefaultTableModel(str,str);
final JTable list = new JTable(mo);
list.setBorder(new CompoundBorder());
list.setBackground(new Color(238, 232, 170));
list.setShowGrid(false);
// list.setListData(str);
list.getColumnModel().getColumn(1).setPreferredWidth(10);
JScrollPane scrollPane = new JScrollPane(list);
scrollPane.setPreferredSize(new Dimension(70, 300));
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
list.setTableHeader(null);
list.setFillsViewportHeight(true);
panel.add(scrollPane);
final JPanel panel_1 = new JPanel();
panel_1.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
contentPane.add(panel_1, BorderLayout.CENTER);
panel_1.setLayout(new CardLayout(0, 0));
JPanel panel_2 = new JPanel();
panel_1.add(panel_2, "1");
JLabel lblNewLabel = new JLabel("First");
panel_2.add(lblNewLabel);
JPanel panel_3 = new JPanel();
panel_1.add(panel_3, "2");
JLabel lblNewLabel_1 = new JLabel("Second");
panel_3.add(lblNewLabel_1);
list.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e){
int row = list.getSelectedRow();
int column = list.getSelectedColumn();
CardLayout cl = (CardLayout) panel_1.getLayout();
cl.show(panel_1,list.getValueAt(row, column).toString());
}
});
// list.add
}
}

Need the scrollbar to increase to the panel height even when maximized.
JPanel panel = new JPanel(new BorderLayout());
This will solve your first problem.

Is it posible to place the tabs within JTabbedPane(JPanel)?

Like this!
And the setOpaque(false); in JTabbedPane didn't work.
Would someone help me please?
part of my code:
for (int x=1; x<6; x++){
newsPanel[x]=new JPanel();
newsPanel[x].add(newspicLabel[x]);
NewsTab.addTab("", Controlbtn, newsPanel[x]);
}
NewsTab.setTabPlacement(JTabbedPane.RIGHT);
NewsTab.setOpaque(false);
thank you very much!!!
I have done the JTabbedPane, but i wanna the tab button placed in the JTabbedPane(Panel) like this ---enter link description here

Here is a sample code.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
public class SidePane extends JPanel {
Color c[] = {Color.RED, Color.CYAN, Color.BLACK, Color.BLUE, Color.YELLOW};
public SidePane() {
setLayout(new BorderLayout(10, 10));
ButtonGroup group = new ButtonGroup();
JToggleButton[] buttons = new JToggleButton[5];
JPanel leftTop = new JPanel(new GridLayout(buttons.length, 1, 10, 10));
leftTop.setOpaque(false);
JPanel left = new JPanel();
left.setOpaque(false);
for (int i = 0; i < buttons.length; i++) {
buttons[i] = new JToggleButton(i + "");
group.add(buttons[i]);
leftTop.add(buttons[i]);
buttons[i].addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(SidePane.this, ((JToggleButton)e.getSource()).getText()); // Write whatever you like.
}
});
}
buttons[0].setSelected(true);
left.add(leftTop);
add(left, "East");
setBackground(Color.red);
}
public static void main(String[] args) {
JFrame frame = new JFrame("My Side Pane");
frame.add(new SidePane());
frame.setSize(600, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

Centering image in a JFrame?

I'm creating an about JFrame for my program. I have an icon which I used for the program and I have that show up as the first thing on the about JFrame, but I'm having issues trying to center the image. If I do some kind of centering it screws up the whole alignment of everything else.
I'm trying to have all the JLabels, other than the icon, to be left aligned. Then have the icon aligned to the center.
I had to remove some personal information, whatever I did remove I put them between "[]".
import java.awt.Dimension;
import java.awt.Font;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class About extends JFrame {
public About() {
super("About [PROGRAM]");
setIconImage([PROGRAM].getInstance().setIcon());
JPanel main = new JPanel();
main.setLayout(new BoxLayout(main, BoxLayout.Y_AXIS));
main.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
JLabel icon = new JLabel("", new ImageIcon(getClass().getResource(Constants.ICON_FULL)), JLabel.CENTER);
JLabel name = new JLabel("[PROGRAM]");
JLabel expandedName = new JLabel("[PROGRAM DESCRIPTION]");
JLabel copyright = new JLabel("[COPYRIGHT JUNK]");
JLabel credits = new JLabel("[CREDITS]");
name.setFont(new Font(name.getFont().getFamily(), Font.BOLD, 18));
copyright.setBorder(BorderFactory.createEmptyBorder(0,0,10,0));
main.add(icon);
main.add(Box.createRigidArea(new Dimension(0, 10)));
main.add(name);
main.add(expandedName);
main.add(copyright);
main.add(credits);
add(main);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
}

Consider using some layouts to help you out. Ones that come to mind include BorderLayout with the icon in the BorderLayout.CENTER position. You can stack stuff on one side using a BoxLayout using JPanel that is added to the main BorderLayout-using JPanel.
e.g.,
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.*;
#SuppressWarnings("serial")
public class About extends JDialog {
public static final String IMAGE_PATH = "http://upload.wikimedia.org/wikipedia/"
+ "commons/thumb/3/39/European_Common_Frog_Rana_temporaria.jpg/"
+ "800px-European_Common_Frog_Rana_temporaria.jpg";
public About(JFrame frame) {
super(frame, "About [PROGRAM]", true);
ImageIcon myIcon = null;
try {
URL imgUrl = new URL(IMAGE_PATH);
BufferedImage img = ImageIO.read(imgUrl);
myIcon = new ImageIcon(img);
} catch (MalformedURLException e) {
e.printStackTrace();
System.exit(-1);
} catch (IOException e) {
e.printStackTrace();
System.exit(-1);
}
JPanel main = new JPanel(new BorderLayout());
main.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JLabel centerLabel = new JLabel(myIcon);
JLabel name = new JLabel("[PROGRAM]");
JLabel expandedName = new JLabel("[PROGRAM DESCRIPTION]");
JLabel copyright = new JLabel("[COPYRIGHT JUNK]");
JLabel credits = new JLabel("[CREDITS]");
name.setFont(new Font(name.getFont().getFamily(), Font.BOLD, 18));
copyright.setBorder(BorderFactory.createEmptyBorder(0, 0, 10, 0));
int eb = 20;
centerLabel.setBorder(BorderFactory.createEmptyBorder(eb, eb, eb, eb));
JPanel leftPanel = new JPanel();
leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));
leftPanel.add(name);
leftPanel.add(Box.createVerticalGlue());
leftPanel.add(expandedName);
leftPanel.add(copyright);
leftPanel.add(credits);
leftPanel.add(Box.createVerticalGlue());
main.add(centerLabel, BorderLayout.CENTER);
main.add(leftPanel, BorderLayout.LINE_START);
add(main);
pack();
}
public static void main(String[] args) {
final JFrame frame = new JFrame("GUI");
JPanel panel = new JPanel();
panel.add(new JButton(new AbstractAction("About") {
#Override
public void actionPerformed(ActionEvent e) {
About about = new About(frame);
about.setLocationRelativeTo(frame);
about.setVisible(true);
}
}));
frame.add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}