What is window adapter class in Java?
The class WindowAdapter is an abstract (adapter) class for receiving window events. All methods of this class are empty. This class is convenience class for creating listener objects.
What is the use of setEchoChar () method?
setEchoChar() method Sets the echo character for this text field. An echo character is useful for text fields where user input should not be echoed to the screen, as in the case of a text field for entering a password. Setting echoChar = 0 allows user input to be echoed to the screen again.
What is JTree explain in detail with an example program?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree. It inherits JComponent class.
What is adapter in Java with example?
Adapter is a structural design pattern, which allows incompatible objects to collaborate. The Adapter acts as a wrapper between two objects. It catches calls for one object and transforms them to format and interface recognizable by the second object. Learn more about Adapter.
What is jpasswordfield in Java?
PasswordField is a part of javax.swing package . The class JPasswordField is a component that allows editing of a single line of text where the view indicates that something was typed by does not show the actual characters. JPasswordField inherits the JTextField class in javax.swing package.
Where does the jpasswordfield class reside in the Swing package?
NOTE: Like other Swing components, the JPasswordField class resides in the package javax.swing. 2. Adding JPasswordField to a container:
How to add event listeners for jpasswordfield?
Adding event listeners for JPasswordField We can add a listener for the event in which the user presses Enter key after typing text into the field. For example: System.out.println (“Password must contain at least 8 characters!”); The above code will check for length of the entered password as soon as the user hits Enter key.
How do I echo a character in jpasswordfield?
Commonly used method of JPasswordField : char getEchoChar() : returns the character used for echoing in JPasswordField. setEchoChar(char c) : set the echo character for JPasswordField. String getPassword() : returns the text contained in JPasswordField. String getText() : returns the text contained in JPasswordField.