View difference between Paste ID: eYGfThcT and QrHthddv

 I have a Jframe that includes a Jspinner. When the JSpinner is increased a new JTextField is created in my panel headerPanel. The script creates the textboxes with an integer attached to their variable name (tFrame0, tFrame1, and so on).
 
         spinner = new JSpinner();
         spinner.addContainerListener(new ContainerAdapter() {
             @Override
             public void componentAdded(ContainerEvent arg0) {
                 boxesChanged();
             }
         });
         spinner.addChangeListener(new ChangeListener() {
             public void stateChanged(ChangeEvent arg0) {
                 int spinnerValue = (Integer) spinner.getValue();
                 if (spinnerValue == headerPanel.getComponentCount()) {
                     System.out.println("Error, spinner shouldn't change to same value");
                 }
 
                 if (spinnerValue < headerPanel.getComponentCount()) {
                     headerPanel.removeAll();
                 }
 
                 while (spinnerValue > headerPanel.getComponentCount()) {
                     boxesChanged();
 
                     // frame.getContentPane().add(tField);
                     frame.revalidate(); // For JDK 1.7 or above.
                     // frame.getContentPane().revalidate(); // For JDK 1.6 or below.
                     frame.repaint();
                 }
             }
         });
 
 Now I'm trying to loop through my code based on the number of components in my headerPanel but I don't know how to append my for loop int i to a variable name.
 
 Variables
 
     Public JTextField() tField;
     Public String nameTField = "tFrame";
     Public Object[] inputData;
 
 
 Creating the text boxes
 
     public void boxesChanged() {
         tField = new JTextField();
         tField.setName(nameTField + (headerPanel.getComponentCount()));
         headerPanel.add(tField);
     }
 
 Loop attempt (Located in a separate class with access to the GUI)
 
     int hp = headerPanel.getComponentCount();
     inputData = new Object[hp];
     for (int i = 0; i < hp; i++) {
         tField = new JTextField();
         tField.setName(nameTField + i);
         inputData[i] = tField.getText();
     }
 
 EDIT
 
 I was able to make some headway with this https://stackoverflow.com/questions/24642059/for-loop-output-in-jframe?fbclid=IwAR1piMmk8EjygobXdxkyxfM9idA5pCh4WJrpBx9QINbsMcmc5MvaUZ3gb0I. When creating the textboxes, I can assign a Document Listener to them and then they are able to pass me information. I'm still having some issues with how I can assign each input from these to my for loop however.
 
     public void boxesChanged() {
     tField = new JTextField();
     tField.setName(nameTField + (headerPanel.getComponentCount()));
     tField.getDocument().addDocumentListener(new DocumentListener(){
           public void changedUpdate(DocumentEvent e) {
             warn();
           }
           public void removeUpdate(DocumentEvent e) {
             warn();
           }
           public void insertUpdate(DocumentEvent e) {
             warn();
           }
 
           public void warn() {
              if(tField.getText()!=null) {
                  System.out.println(tField.getText());
              }
           }
     });
 
     headerPanel.add(tField);
 
     }
 
 EDIT 2
 
 I've managed to make a change that adds each textfields information to my inputData Object[], but only if I add data sequentially (tField0 must be filled out, then tField1, etc).
 
 For some reason each time I add a new JTextField it changes the document listener to that field only, even though I create the document listener in each new JTextField.
 
         public void boxesChanged() {
         int hp = headerPanel.getComponentCount();
 
         tField = new JTextField();
         textFieldList.add(tField);
         tField.setName(nameTField + hp);
 
         tField.getDocument().addDocumentListener(new DocumentListener() {
 
             public void changedUpdate(DocumentEvent e) {
                 warn();
             }
 
             public void removeUpdate(DocumentEvent e) {
                 warn();
             }
 
             public void insertUpdate(DocumentEvent e) {
                 warn();
             }
 
             public void warn() {
                 int digits = 1;
 
                 if (hp > 9) {
                     digits = 2;
                 }
 
                 String getFieldString;
                 int getFieldNum;
 
                 getFieldString = tField.getName().substring(tField.getName().length() - digits);
 
                 getFieldNum = Integer.parseInt(getFieldString);
 
                 if (tField.getText() != null) {
                     Object[] currentData = new Object[getFieldNum + 1];
                     currentData[getFieldNum] = tField.getText();
 
                     inputData[getFieldNum] = tField.getText();
 
                     for (int i = 0; i < inputData.length; i++) {
                         if (inputData[i] != null) {
                             System.out.println("for i = " + i + ": " + inputData[i]);
                         }
 
                     }
                 }
             }
         });
 
 
 With this setup if I set the default JTextField to "Box 1" my console output will look like this.
 
     for i = 0: B
     for i = 0: Bo
     for i = 0: Box
     for i = 0: Box
     for i = 0: Box 1
 
 If I create the second JTextField and then type in "Box 2" in that field it will output like this
 
     //Same as above
     for i = 0: Box 1
     for i = 1: B
     for i = 0: Box 1
     for i = 1: Bo
     for i = 0: Box 1
     for i = 1: Box
     for i = 0: Box 1
     for i = 1: Box
     for i = 0: Box 1
     for i = 1: Box 2
 
 However say I decide to change the boxes to "Box 0" and "Box 1" my console after making both of these changes will output this.
 
     //Same as above
     for i = 0: Box 1 //Deleted "1" from box 1
     for i = 1: Box 2 //Deleted "1" from box 1
     for i = 0: Box 1 //Added "0" to former box 1
     for i = 1: Box 2 //Added "0" to former box 1
     for i = 0: Box 1 //Deleted 2 from box 2
     for i = 1: Box //Deleted 2 from box 2
     for i = 0: Box 1 //Added 1 to former box 2
     for i = 1: Box 1 //Added 1 to former box 2
 
 If I were to keep going and add a 3rd JTextField etc. only the last created JTextField will show a change in output on the console.
 
 EDIT 3
 
 I have managed to pass the code along a little further now. Now I can store all of my data properly within an ArrayList that will hold my data, but only if I enter my data sequentially.
 
 Variables
 
     Public JTextField() tField; //textField element is public and created in boxesChanged()
     Public String nameTField = "tFrame"; //Name of TextField before appending variable in spinner
     Public Object[] headerData; //inputData changed to headerData in Edit 3.
     private ArrayList<JTextField> textFieldList = new ArrayList<JTextField>(); //ArrayList that holds JTextFields
     private JPanel headerPanel; //Panel that holds JTextFields
 
 
 My Spinner
 
     spinner = new JSpinner(); //New spinner
 		spinner.addContainerListener(new ContainerAdapter() {
 			@Override
 			public void componentAdded(ContainerEvent arg0) { //On creation Spinner value is 1, so runs boxesChanged() to set the first JTextFrame
 				boxesChanged();
 			}
 		});
 		spinner.addChangeListener(new ChangeListener() {
 			public void stateChanged(ChangeEvent arg0) { //Each time the spinner changes
 				int spinnerValue = (Integer) spinner.getValue();
 				if (spinnerValue == headerPanel.getComponentCount()) {
 					System.out.println("Error, spinner shouldn't change to same value"); //Was reaching this during some debuging earlier, but not recently
 				}
 
 				if (spinnerValue < headerPanel.getComponentCount()) {
 					headerPanel.removeAll(); //removes all existing JTextFields
 				}
 
 				while (spinnerValue > headerPanel.getComponentCount()) { //Populates headerPanel with JTextFields until spinnerValue == headerPanel.getComponentCount
 					boxesChanged();
 
 					frame.revalidate();
 					frame.repaint();
 				}
 			}
 		});
 
 My boxesChanged() method
 
     	public void boxesChanged() { //Runs whenever spinner value != number of JTextPanels in headerPanel
 		int hp = headerPanel.getComponentCount();
 
 		tField = new JTextField(); //Create JTextField
 		textFieldList.add(tField); //adds the current JTextField to ArrayList<JTextField> textFieldList
 		tField.setName(nameTField + hp); //sets name of current JTextField to String nameTField + current JTextPanelCount (tFrame0, tFrame1, ...)
 
 		tField.getDocument().addDocumentListener(new DocumentListener() { //Adds a listener to each instance of JTextField
 
             //If any changes to JTextField, runs warn()
 			public void changedUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void removeUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void insertUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void warn() {
 
 				int digits = 1; //sets the number of digits to subtract from substring
 
 				if (hp > 9) { //if >9 uses 2 didgits, Spinner max is 100, starting at 0, so 99 is max
 					digits = 2;
 				}
 
 				String getFieldString; //String used to hold substring
 				int getFieldNum; //int for parseInt of getFieldString
 
 				getFieldString = tField.getName().substring(tField.getName().length() - digits); //Gets the last digit(s) from tField.getName
 
 				getFieldNum = Integer.parseInt(getFieldString); //Parses substring into int
 
 				headerData = new Object[hp + 1]; //Create headerData with size of number of JTextField +1 (if 0, will instantiate a null array)
 
 				if (tField.getText() != null) { //null check
 
 					headerData[getFieldNum] = tField.getText(); //sets the headerData value to current JTextField's text
 
 					for (int i = 0; i < textFieldList.size(); i++) { //Loop through to see if each text field list contains correct data
 						System.out.println("TFL i :" + i + " " + textFieldList.get(i).getText());
 					}
 				}
 			}
 		});
 
 		headerPanel.add(tField); //Accidentally left this part out of the previous edit, hope it wasn't what was causing my issue
 
 	}
 
 With this setup if I set the default JTextField to "Box 1" my console output will look like this.
 
     TFL i :0 B
     TFL i :0 Bo
     TFL i :0 Box
     TFL i :0 Box
     TFL i :0 Box 1
     TFL i :0 Box 1
     TFL i :1 B
     TFL i :0 Box 1
     TFL i :1 Bo
     TFL i :0 Box 1
     TFL i :1 Box
     TFL i :0 Box 1
     TFL i :1 Box
     TFL i :0 Box 1
     TFL i :1 Box 2
 
 However, this is only if I add data sequentially (tField0 must be filled out before I increase the spinner, then tField1 must be filled out, increase the spinner, etc.).
 Otherwise I get an ArrayIndexOutOfBoundsException at
 
-    headerData[getFieldNum] = tField.getText();
+    headerData[getFieldNum] = tField.getText();
 
 
 Edit 5
 
 Variables
 
     private static String nameTField = "tField";
 
     private Object[] headerData;
 
     public String name;
 
 	public List<JTextField> findTextFields() {
 		List<JTextField> fields = new LinkedList<>();
 
 		Component[] children = headerPanel.getComponents();
 		// this is your 'search-loop':
 		for (Component child : children) {
 			if (child instanceof JTextField) {
 				JTextField childField = (JTextField) child;
 				name = childField.getName();
 				if (name.startsWith(nameTField)) {
 					fields.add(childField);
 				}
 			}
 		}
 
 		return fields;
 	}
 
 public static final Pattern POSTFIX_PATTERN = Pattern.compile(nameTField + "(\\d+)");
 
 JSpinner
 
     spinner = new JSpinner();
 	spinner.addContainerListener(new ContainerAdapter() {
 		@Override
 		public void componentAdded(ContainerEvent arg0) {
 			boxesRemoved();
 			boxesChanged();
 			}
 	});
 	spinner.addChangeListener(new ChangeListener() {
 		public void stateChanged(ChangeEvent arg0) {
 			int spinnerValue = (Integer) spinner.getValue();
 			if (spinnerValue == headerPanel.getComponentCount()) {
 				System.out.println("Error, spinner shouldn't change to same value");
 			}
 
 			if (spinnerValue < headerPanel.getComponentCount()) {
 				boxesRemoved();
     			frame.revalidate();
 				frame.repaint();
 			}
 
 			while (spinnerValue > headerPanel.getComponentCount()) {
 				boxesChanged();
 
 				// frame.getContentPane().add(tField);
 				frame.revalidate(); // For JDK 1.7 or above.
 				// frame.getContentPane().revalidate(); // For JDK 1.6 or below.
 				frame.repaint();
 			}
 		}
 	});
 
 boxesRemoved() method
 
 	public void boxesRemoved() {
 		for (JTextField textField : findTextFields()) {
 			String name = textField.getName();
 			Matcher matcher = POSTFIX_PATTERN.matcher(name);
 			if (matcher.matches()) {
 				String strPostfix = matcher.group(1);
 				int postFixNumeric = Integer.parseInt(strPostfix);
 
 				System.out.println("for postFix = " + postFixNumeric + ": " + textField.getText());
 				if (postFixNumeric < findTextFields().size()) {
 					System.out.println("PFN: " + postFixNumeric);
 					System.out.println("FTF: " + findTextFields().size());
 					findTextFields().remove(findTextFields().size() - 1);
 					headerPanel.remove(findTextFields().size() - 1);
 				}
 			}
 		}
 	}
 
 
 boxesChanged() method
 
 	public void boxesChanged() {
 		int hp = headerPanel.getComponentCount();
 
 		tField = new JTextField();
 		tField.setName(nameTField + hp);
 		textFieldList.add(tField);
 
 		tField.getDocument().addDocumentListener(new DocumentListener() {
 
 			public void changedUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void removeUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void insertUpdate(DocumentEvent e) {
 				warn();
 			}
 
 			public void warn() {
 
 				int digits = 1;
 
 				if (hp > 9) {
 					digits = 2;
 				}
 
 				String getFieldString;
 				int getFieldNum;
 
 				getFieldString = tField.getName().substring(tField.getName().length() - digits);
 
 				getFieldNum = Integer.parseInt(getFieldString);
 
 				headerData = new Object[hp + 1];
 
 				for (JTextField textField : findTextFields()) {
 					Matcher matcher = POSTFIX_PATTERN.matcher(name);
 					System.out.println(name);
 					if (matcher.matches()) {
 						String strPostfix = matcher.group(1);
 						int postfixNumeric = Integer.parseInt(strPostfix);
 
 						System.out.println("for postfix = " + postfixNumeric + ": " + textField.getText());
 					} else {
 						System.out.println("matcher error: " + matcher);
 					}
 				}
 			}
 		});
 
 		headerPanel.add(tField);
 
 	}