Java Basic

Java Basic

Easy Questions

JAVA Programming

Java Basic
Basic Syntax
Object & Classes
Basic Datatypes
Variable Types
Modifier Types
Basic Operators
Loop Control
Decision Making
Numbers
Characters
Strings
Arrays
Date & Time
Regular Expressions
Methods
Files and I/O
Exceptions
Inheritance
Polymorphism
Abstraction
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Packages
Data Structures
Collections
Generics
Serialization
Networking
Multithreading
Applet
  1. Which of these methods can be used to know the type of focus change?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    There are two types of focus events – permanent and temporary. The isTemporary() method indicates if this focus change is temporary, it returns a Boolean value.

  1. Which of these events is generated when the window is closed?










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    NA

    Correct Option: B

    A WindowEvent is generated when a window is opened, close, activated or deactivated.

  1. Which of these is superclass of ContainerEvent class?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    ContainerEvent is superclass of ContainerEvent, FocusEvent, KeyEvent, MouseEvent and WindowEvent.

  1. Which of the following is advantage of using PreparedStatement in Java?










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    NA

    Correct Option: B

    PreparedStatement in Java improves performance and also prevents from SQL injection.

  1. FocusEvent is subclass of which of these classes?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    ComponentEvent