Frequent question: What is Addwindowlistener in Java?

What are the methods under WindowListener interface in Java?

Methods of WindowListener interface

Sr. no. Method signature
1. public abstract void windowActivated (WindowEvent e);
2. public abstract void windowClosed (WindowEvent e);
3. public abstract void windowClosing (WindowEvent e);
4. public abstract void windowDeactivated (WindowEvent e);

What is window event in Java?

public class WindowEvent extends ComponentEvent. A low-level event that indicates that a window has changed its status. This low-level event is generated by a Window object when it is opened, closed, activated, deactivated, iconified, or deiconified, or when focus is transfered into or out of the Window.

What is window Deiconified?

Iconifying means substituting a small icon on the desktop for the window deiconifying means the opposite. A window is activated if it or a component it contains has the keyboard focus; deactivation occurs when the window or one of its contents loses the keyboard focus.

Which method is invoked when a window has been closed as the result of calling dispose on the window?

void windowClosed(WindowEvent e)

Invoked when a window has been closed as the result of calling dispose on the window.

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What are key events in Java?

Class KeyEvent. An event which indicates that a keystroke occurred in a component. This low-level event is generated by a component object (such as a text field) when a key is pressed, released, or typed.

What is the use of Windows event class?

The object of this class represents the change in state of a window. This low-level event is generated by a Window object when it is opened, closed, activated, deactivated, iconified, or deiconified, or when focus is transfered into or out of the Window.

What is the use of window listener in Java?

Interface WindowListener. The listener interface for receiving window events. The class that is interested in processing a window event either implements this interface (and all the methods it contains) or extends the abstract WindowAdapter class (overriding only the methods of interest).

What is Iconified in Java?

Called just after the listened-to window is iconified or deiconified, respectively. … Called just after the listened-to window’s state is changed by being iconified, deiconified, maximized, or returned to normal. The state is available through the WindowEvent as a bitwise mask. The possible values, defined in java. awt.

Which method is called when the user click out of the window frame?

We can close the AWT Window or Frame by calling dispose() or System. exit() inside windowClosing() method.

What is dispose in Java?

JFrame.dispose() public void dispose() Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned children.

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