What is adapter class?
An adapter class provides an empty implementation of all methods in an event listener interface. Adapter classes are useful when you want to receive and process... Read more »
‘Java Interview Questions’ - KyaPoocha.com
What is an event and what are the models available for event handling?
An event is an event object that describes a state of change in a source. In other words, event occurs when an action is generated, like pressing button, clicking... Read more »
What is the difference between applications and applets?
a) Application must be run on local machine whereas applet needs no explicit installation on local machine. b) Application must be run explicitly within a java-compatible... Read more »
What is the difference between exception and error?
The exception class defines mild error conditions that your program encounters. Ex: Arithmetic Exception, FilenotFound exception Exceptions can occur when try to... Read more »
What is the difference between abstract class and interface?
a) All the methods declared inside an interface are abstract whereas abstract class must have at least one abstract method and others may be concrete or abstract. b) ... Read more »
What is interface and its use?
Interface is similar to a class which may contain method’s signature only but not bodies and it is a formal set of method and constant declarations that must... Read more »
What is Garbage Collection and how to call it explicitly?
When an object is no longer referred to by any variable, java automatically reclaims memory used by that object. This is known as garbage collection.System.gc()... Read more »
What are methods and how are they defined?
Methods are functions that operate on instances of classes in which they are defined. Objects can communicate with each other using methods and can call methods... Read more »
What are nested classes ?
There are two types : static and non-static. static class means the members in its enclosing class (class within class) can be accessed by creating an object and... Read more »
What is a String Tokenizer ?
String Tokenizer provide parsing process in which it identifies the delimiters provided by the user , by default delimiters are spaces, tab, newline etc. and separates... Read more »
What are packages and why ? how to execute a program in a package ?
Package is a set of classes, which can be accessed by themselves and cannot be accessed outside the package. and can be defined as package .Package name and the... Read more »
What is Object class and java.lang ?
Object class is the superclass of all the classes and means that reference variable of type object can refer to an object of any other class. and also defines methods... Read more »
What are packages and why ? how to execute a program in a package ?
Package is a set of classes, which can be accessed by themselves and cannot be accessed outside the package. and can be defined as package .Package name and the... Read more »
Scope and lifetime of variables ?
Scope of variables is only to that particular blocklifetime will be till the block ends.variables declared above the block within the class are valid to that inner... Read more »
What are the restrictions imposed by a Security Manager on Applets?
i) Cannot read or write files on the host that’s executing it. ii) Cannot load libraries or define native methods. iii) Cannot make network connections... Read more »
What is a policy?
It’s an abstract class for representing the system security policy for a Java application environment(specifying which permissions are available for code from... Read more »
What is CTS (Common Type System)?
It defines about how Objects should be declard, defined and used within .NET. CLS is the subset of CTS. Read more »
What is clipping?
Clipping is the process of confining paint operations to a limited area or shape. Read more »
What is the Dictionary class?
The Dictionary class provides the capability to store key-value pairs. Read more »
When can an object reference be cast to an interface reference?
An object reference be cast to an interface reference when the object implements the referenced interface. Read more »