IT & Programming Information

Java Layout Managers The GUI is made up of a number of components; the Layout Managers affect the content pane. Layout Managers are provided to arrange GUI components on a container for presentation purposes. This allows the programmer to concentrate on the basic "look and feel" and lets the layout managers process most of the layout details. There are many layout managers. Basic Layout Managers FlowLayout Default for  java.applet.Applet ,  java.awt.Panel  and  java.swing.JPanel . Places components sequentially (left to right) in the order they were added. You can specify the order. BorderLayout Default for the content panes of  JFrame  and  JApplets . Arranges the components into five areas: North, South East, West and Center GridLayout Arranges the components into rows and columns Advanced Layout Managers BoxLayout Allows components to be arranged left-to-right or top-to-bottom

Difference in Core Java Method Overloading Method Overriding Overloading  occurs when two or more methods in one class have the same method name but different parameters. Overriding  means having two methods with the same method name and parameters (i.e.,  method signature ). One of the methods is in the parent class and the other is in the child class. It is a  compile time polymorphism . It is a  run time polymorphism . It may or may not need  inheritance  in Method Overloading. It always requires inheritance in Method Overriding. In Method Overloading, relationship is there between methods of same class. In Method Overriding, relationship is there between methods of super class and sub class. The static method can be overloaded. The static method cannot be overridden. Example: class Add {    int sum(int a, int b)    {      return a