EDIT

import java.util.ArrayList;

import java.util.List;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import eu.etaxonomy.cdm.model.description.QuantitativeData;

import eu.etaxonomy.cdm.model.description.StatisticalMeasure;

import eu.etaxonomy.taxeditor.model.ImageResources;

    private List<Text> textFields = new ArrayList<>();

    public QuantitativeDataDialogComposite(Character initialInput, QuantitativeData editorValue, Composite parent, int style) {

        setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        ScrolledComposite scrolledComposite_1 = new ScrolledComposite(this, SWT.BORDER | SWT.V_SCROLL);

        Composite valuesComposite = new Composite(scrolledComposite_1, SWT.NONE);

        valuesComposite.setLayout(new GridLayout());

        //add empty text field

        Text emptyTextField = addValue(initialInput==null?null:initialInput.toString(), valuesComposite);

        emptyTextField.setFocus();

        emptyTextField.setSelection(emptyTextField.getText().length());

        //add exisiting values

        editorValue.getStatisticalValues().stream()

        .filter(value->value.getType().equals(StatisticalMeasure.EXACT_VALUE()))

        .forEach(exact->addValue(Float.toString(exact.getValue()), valuesComposite));

        scrolledComposite_1.setContent(valuesComposite);

        scrolledComposite_1.setMinSize(valuesComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT));

    }

    private Text addValue(String value, Composite valuesComposite) {

        Composite composite_2 = new Composite(valuesComposite, SWT.NONE);

        composite_2.setLayout(new GridLayout(2, false));

        Text text = new Text(composite_2, SWT.BORDER);

        if(value!=null){

            text.setText(value);

        }

        textFields.add(text);

        btnNewButton_2.setImage(ImageResources.getImage(ImageResources.ACTIVE_DELETE_ICON));

        btnNewButton_2.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent e) {

                text.setText("");

                textFields.remove(text);

                ((GridData)composite_2.getLayoutData()).exclude = true;

                valuesComposite.layout();

            }

        });

        return text;

    }

    public List<Text> getTextFields() {

        return textFields;