JAVA Common Interview Questions and Answers

Which containers use a Flow layout as their default layout?- Panel and Applet classes use the FlowLayout as their default layout. What are wrapper classes?- Wrapper classes are classes that allow primitive types to be accessed as objects. What are Vector, Hashtable, LinkedList and Enumeration?- Vector : The Vector class provides the capability to implement a growable array of objects. Hashtable : The Hashtable class implements a Hashtable data structure. A Hashtable indexes and stores objects in a dictionary using hash codes as the object’s keys. Hash codes are integer values that identify objects. LinkedList: Removing or inserting elements in the middle of an array can be done using LinkedList. A LinkedList stores each object in a separate link whereas an...

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