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is Box.createHorizontalBox() still supported? import error

I am just trying to use the class Box (Java API) using Eclipse Neon. When I import javax.swing.Box, the class seems not to exist anymore.
If I call the function like this:
Box myBox = Box.createHorizontalBox();
Eclipse shows an error: "The method createHorizontalBox() is undefined for the type Box"
Is class Box (and functions) not included in javax.swing? Any idea what is wrong?

Ok I was trying to do that inside a class called "Box", so I just changed the name of the class and all worked find.
Hope to be helpful to anybody else

Yes, it is still.
import java.awt.BorderLayout;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class MainClass {
public static void main(String args[]) {
JFrame f = new JFrame("JPasswordField Sample");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Box rowOne = Box.createHorizontalBox();
rowOne.add(new JLabel("Username"));
rowOne.add(new JTextField());
Box rowTwo = Box.createHorizontalBox();
rowTwo.add(new JLabel("Password"));
rowTwo.add(new JPasswordField());
f.add(rowOne, BorderLayout.NORTH);
f.add(rowTwo, BorderLayout.SOUTH);
f.setSize(300, 200);
f.setVisible(true);
}
}

JDialog in center of screen instead of desired center of JApplet

In my Java applet I have JDialog with couple of radioButtons.
The problem is that this applet is of dimensions 700x300 and the JDialog appears in the center of screen. I want this JDialog to appear in the center of JApplet layout. My constructor invocation looks like this:
final JDialog dialog = new JDialog(
SwingUtilities.windowForComponent(GUIComponentContainer.getInstance().getDocumentTable()),
I18nCommonsImpl.constants.selectCertificate(), ModalityType.APPLICATION_MODAL);
This method:
GUIComponentContainer.getInstance().getDocumentTable()
returns JTable component which is a child of my JApplet.
I also used JDialog "setLocationRelativeTo" method:
dialog.setLocationRelativeTo(GUIComponentContainer.getInstance().getApplet());
None of these seem to work. Is there any other way to accomplish my goal?
I searched along SO for similar questions, but didn't see any working solutions.
Thanks in advance.

Getting the Window for the applet works for me, at least when the applet is launched in Eclipse. For example:
import java.awt.Dimension;
import java.awt.Window;
import java.awt.Dialog.ModalityType;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Box;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
#SuppressWarnings("serial")
public class AppletCentering extends JApplet {
#Override
public void init() {
final JPanel panel = new JPanel();
panel.add(new JButton(new AbstractAction("Press Me") {
#Override
public void actionPerformed(ActionEvent e) {
Window win = SwingUtilities.getWindowAncestor(panel);
System.out.println("win class: " + win.getClass().getCanonicalName());
JDialog dialog = new JDialog(win, "My Dialog", ModalityType.APPLICATION_MODAL);
dialog.add(Box.createRigidArea(new Dimension(200, 200)));
dialog.pack();
dialog.setLocationRelativeTo(win);
dialog.setVisible(true);
}
}));
add(panel);
}
}
But having said this, your question begs the question: why are you even coding for an applet? These have been out of favor for years, and just recently has lost support from Oracle who has decided to finally drop applet browser plug in support.

GridBagLayout is not positioning my JTextArea where I want it to

I am trying to place a JTextArea inside of JFrame using GridBagLayout. I cannot resize the text area nor is it being placed according to my gridx and gridy coordinates. Having a bit of trouble figuring out whats missing or what I am doing wrong.
I am trying to build an ATM with a GUI interface. The text area will be my screen. Kinda new to GUI's so any help would be greatly appreciated.
ATM.java
Represents an automated teller machine
import java.awt.Color;
import javax.swing.JFrame;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Component;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JButton;
import java.awt.Container;
//import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class ATM extends JFrame
{
private JFrame atmContainer;
private GridBagConstraints constraints;
private GridBagLayout layout;
private JTextArea atmScreen;
private Container container;
// constants corresponding to main menu options
/*private static final int BALANCE_INQUIRY = 1;
private static final int WITHDRAWAL = 2;
private static final int DEPOSIT = 3;
private static final int EXIT = 4;*/
// no-argument ATM constructor initializes instance variables
public ATM()
{
atmContainer = new JFrame("ATM");
atmScreen = new JTextArea(5,15);
atmContainer.setLayout(new GridBagLayout());
constraints = new GridBagConstraints();
atmContainer.setSize(600, 400);
atmContainer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //completely closes the program
atmScreen.setText("Welcome user");
atmScreen.setEnabled(false);
// atmScreen.setSize(100,100);
constraints.gridx = 1;
constraints.gridy = 0;
atmContainer.add(atmScreen, constraints);
atmContainer.setVisible(true); //makes atm visible
atmContainer.setLocationRelativeTo(null);
}
}

Seeing you are new to GUIs, I advise utilizing a GUI builder; they make designing a GUI considerably easier and more productive. This question names a few options:
Best GUI designer for eclipse?
Also, is there a reason that you are using the GridBagLayout? For beginners, it may be a difficult to understand and to use. As pointed out by camickr, using the BorderLayout will do the job just fine.
From my personal experience, it was easier for me to first learn about the FlowLayout. It is the simplest of all layouts. You should gain a good understanding by experimenting with it a little.
The Java Tutorials are rich of lessons as well; this is a visual overview of possible layout managers:
https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html#gridbag
And this demonstrates how to use a FlowLayout:
https://docs.oracle.com/javase/tutorial/uiswing/layout/flow.html

How to set size of applet?

I have written a little test applet and start the applet via Eclipse appletviewer.
I have noted tag at the begginig of the code, but appletviewer doesn't see it. It starts the applet in standart window with the same size every time.
I use JDK 1.7, Eclipse Kepler
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
/*<applet code="TestApplet" width=200 height=40>
</applet>
*/
public class TestApplet extends JApplet{
private Container cp;
private JPanel mainPanel, testPanel1;
private JLabel testLabel1 = new JLabel("Test1"),
testLabel2 = new JLabel("Test2");
private JTextField testTextField1 = new JTextField(),
testTextField2 = new JTextField();
private JButton testButton1 = new JButton("TestButton1"),
testButton2 = new JButton("TestButton2");
public void init(){
cp = getContentPane();
testPanel1 = new JPanel(new GridLayout(3,1));
cp.add(testPanel1);
testPanel1.add(testLabel1);
testPanel1.add(testTextField1);
testPanel1.add(testButton1);
}
public void start(){
}
public void stop(){
}
public void destroy(){
}
}
How can I change size of the applet window when I start it using Eclipse?

You can change it in Run Configurations in Eclipse:
Run -> Run Configurations -> Java Applet -> New Configuration. the default size can be changed in the Parameters tab.
Note that this is only for testing and the actual applet your user sees is depends on how the applet is launched for them (Which is done typically via a <applet>, <object> or <embed> tags in a webpage. all of these tags support size attributes.)

Java ImageIcon/Icon and JLabel is not working

Why is it that my code is not showing the image that I inserted? there's no compilation error or Syntax error but why is it like that?
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.SwingConstants;
public class FirstUI extends JFrame{
private JLabel firstlabel;
private JLabel secondLabel;
private JLabel pie;
public FirstUI(){
super("Tittle");
setLayout(new FlowLayout());
firstlabel = new JLabel("Hello World");
firstlabel.setToolTipText("Hello World");
String path = "pie.png";
Icon pie = new ImageIcon(path);
secondLabel = new JLabel("Text with icon",pie,SwingConstants.LEFT);
add(secondLabel);
add(firstlabel);
}
}
main class
import javax.swing.JFrame;
public class FirstUiTest {
public static void main(String[] args){
FirstUI MyUI = new FirstUI();
MyUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyUI.setSize(320,280);
MyUI.setVisible(true);
}
}

if the "pie.png" is in the same Path of FirstUI.class try to use:
Icon pie = new ImageIcon(ImageIO.read( FirstUI.class.getResourceAsStream( "pie.png" ) ) );

I tried this exact code, and it worked. It looks like pie.png cannot be found. If you're using eclipse, put it in the project root (The same folder that has /bin and /src). Otherwise, put it in the same directory where you run the java command from.