Final answer:
In GUI programming, the methods commonly used to get and set the text on a widget are getText() and setText(). getText() retrieves the current text, and setText() updates it.
Step-by-step explanation:
For most widgets in a graphical user interface (GUI), the common methods to get and set the text displayed on the widget are the getText() and setText() methods, respectively. These methods are typically available in GUI toolkits such as Swing for Java, GTK+ for C, and others for different programming languages. When you want to retrieve the current textual content of a widget like a label, text field, or button, you would use getText(). Similarly, when you want to change or set the text that a widget displays, you would use setText() and pass the new string as an argument.