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Explain try and catch exception in java?
Why use exceptions instead of return values? 1. Forces error checking 2. Cleans up your code through separating the normal case from the exceptional case. (The code isn't littered along with a lot of if-else blocks checking return values.) 3. Low overhead for non-exceptional case
Traditional programming languages set flags or return bad values such as -1 to denotes problems. Programmers frequent don't check these values.
Java throws Exception objects to denotes a problem. These cannot be ignored.try-catchtry-catch public class HelloThere {
public static void main(String[] args) { try { System.out.println("Hello " + args[0]); } catch (ArrayIndexOutOfBoundsException e) { System.out.println("Hello Whoever you are."); }
}
Dynamic JAVA Class and type information is kept around at runtime. This allows runtime loading and inspection of code in a very flexible way.
What is the importance of static variable? Static variables are class level variables where all objects of the class refer to the similar variable. If one object alters the val
implementation of DT in netbeans
Instructions: Please make sure your solutions are original, in your own words, expressing your own ideas. Any copying from others' home-works, text books or online sources will
What is an abstract class? Abstract class must be extended/subclassed (to be useful). It serves as a template. A class that is abstract may not be instantiated (ie. you may not
A pointcut is something that describes at what joinpoints an advice should be applied. Advices can be applied at any joinpoint that is supported by the AOP framework. These Pointcu
Define a function that will take a box type of object as argument and return a box object whose dimension is 10 times more than the object
What is output of the following JavaScript code? Str="Virtual University of Pakistan"; document.write(str.substring(5,str.length)) ;
GUI-Based Application Objectives: (1) Learning how to write a GUI-based application in Java. (2) Learning how to write an event driven application program in Java.
A proxy is an object that is formed after applying advice to a target object. When you think of client objects the target object and the proxy object are the similar.
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