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They key word here is anonymous class. While ActionListener may be an interface, the anonymous class would be a subclass of ActionListener. It would be like creating a new class which implements ActionListener.
JButton button = new JButton("Press Me!");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ev) {
System.out.println("PRESS");
}
});
What else can I help you with?
What is an actionlistener?
An ActionListener is exactly what it sounds like. It's an interface used by other classes to listen for an action event. The simplest example of this is on a Button. Normally when you add a Button to a Component nothing will happen when you press it. You need to use a button.addActionListener(actionListener) call to make it listen for button clicks.
What is an interface in visual basic?
An interface in visual basic is any visual thing. For example, when you're making your forms, that's an interface.
What is GUI in java?
GUI stands for Graphical User Interface This refers to the front end screens using which we access a system. For example if you logon to your online banking account, that website can be referred to as the GUI. It is the interface using which you are accessing the bank website.
What is anonymous objects in c plus plus?
There is no such thing as an anonymous object in C++ (no such term is defined by the standard). You can have anonymous classes, anonymous unions or unnamed objects, but never anonymous objects. Consider the following: int* p = new int(); This creates two variables: a pointer variable on the stack (named p) and an integer variable on the heap (unnamed). Although the int on the heap has no name of its own, it is identified by dereferencing the address stored in p (*p), so it is not strictly anonymous. struct foo { //... foo operator++(int); }; In the above example, the int parameter is unnamed, but since it is never referenced (because it is not used) it is not strictly anonymous. You might consider the following an anonymous object: class foo{}; void bar(foo& f){} int main() { bar( foo() ); } The instance of foo in main is merely unnamed. When passed to bar, it is identified by the f reference, so it cannot be regarded as an anonymous object. Upon returning from bar, the unnamed instance falls from scope. At best this can be described as a temporary unnamed object, but not an anonymous object.
What is difference between abstract class and interface in core java give brief answer with example?
Differences:Abstract class can also contain method definitions but an interface can contain only declarationsAll variables in an interface are by default public static and final whereas in Abstract class it is notAn interface can be considered as a pure abstract class that contains no method implementations and contains only declarations.
What is an actionlistener?
An ActionListener is exactly what it sounds like. It's an interface used by other classes to listen for an action event. The simplest example of this is on a Button. Normally when you add a Button to a Component nothing will happen when you press it. You need to use a button.addActionListener(actionListener) call to make it listen for button clicks.
What is the meaning of anonymous?
Is an Unknown Person. Example: From: Anonymous ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ To:___________
What is an example of the anonymous logon group?
Anonymous Logon is a member of the Special Identity Group
How do you cite an anonymous quote in MLA format?
To cite an anonymous quote in MLA format, include the phrase "Anonymous" in place of the author's name in the in-text citation and the works cited entry. For example, (Anonymous).
What is an example of an act of altruism?
Anonymous donation to a charity
What is an interface in visual basic?
An interface in visual basic is any visual thing. For example, when you're making your forms, that's an interface.
What is 3 differences between software interface and command line interface?
Differentiate between Command line interface and Menus interface and example of each interaction style
Where can you find free anonymous email?
www.10minutemail.com for example
What is an example of a software interface for bidding?
EBay is another software interface that specializes in bidding sales by individuals.
What is the reasoning behind the ridiculous user interface of wikianswerscom?
could you give an example of a ridiculous part of the interface. Thanks.
What is IO interface?
An I/O interface is a facility on a computer system for input and/or output of data. An example is a USB port on a PC.
Who or what is the user called Anonymous on WikiAnswers?
Anonymous is not an actual user, but rather an alias for anyone who contributes to WikiAnswers while not logged in. If the website says "Anonymous" did something, it really means that a user who was not logged in did it. For example, a question asked by "Anonymous" is a question that was asked by a user who is not logged in.
