What is SetActionCommand in Java?

How do I use setActionCommand?

In short, to set action command for JButton one should follow these steps:

  1. Create a class that extends JFrame and implements ActionListener .
  2. Create a new JButton .
  3. Use JButton. addActionListener to add a specific ActionListener to this component.
  4. Use JButton. …
  5. Override actionPerformed method and use ActionEvent.

What is the use of setActionCommand () method of ActionEvent class?

JTextField has JTextField#setActionCommand(java. lang. String) method that you can use to set the command string used for action events generated by it. Returns: The object on which the Event initially occurred.

What is the Get button return method?

getActionCommand. Returns the command name of the action event fired by this button. If the command name is null (default) then this method returns the label of the button.

How do you write an action listener?

How to Write an Action Listener

  1. Declare an event handler class and specify that the class either implements an ActionListener interface or extends a class that implements an ActionListener interface. …
  2. Register an instance of the event handler class as a listener on one or more components.

What is use of getSource () method *?

The getSource method is used in the actionPerformed method to determine which button was clicked.

IT IS INTERESTING:  You asked: How do I enable JavaScript on my Internet Explorer browser?

What is setText in Java?

The setText() method of java. text. StringCharacterIterator class in Java is used to set the current text that is to be read by this StringCharacterIterator. This method takes the text to be set as a parameter and sets the text of this StringCharacterIterator at that text.

What is getButton method?

getButton() Returns which, if any, of the mouse buttons has changed state. int. getClickCount() Returns the number of mouse clicks associated with this event.

How do you declare a button?

To define the click event handler for a button, add the android:onClick attribute to the <Button> element in your XML layout. The value for this attribute must be the name of the method you want to call in response to a click event. The Activity hosting the layout must then implement the corresponding method.