Assume the existence of an interface, ActionListener, with the following method

Question

Assume the existence of an interface, ActionListener, with the following method : - actionPerformed: void-returning, accepts no parameters

Define a class , GUIApplication, that implements the above interface and has the following members: - an instance variable , doc, of type Document - a constructor that accepts a Document parameter used to initialize the instance variable - an implementation of the actionPerformed method that invokes the method , save, with the document instance variable as the receiver and sends the message "document saved" to System.out

Explanation / Answer

public class GUIApplication implements ActionListener{

Document document;
public GUIApplication(Document docum)
{
document=docum;

}
public void actionPerformed() {
document.save();
System.out.println("document saved");
}}

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