public BigInteger getValue() {
		String text = textField.getText();
		return computeValueFromString(text, isHexMode);
	}
Returns the current value of the field or null if the field has no current value.

@return the current value of the field or null if the field has no current value.
Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/IntegerTextField.java