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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."); }
}
A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''''a''''-''''z'''') and
Struts framework is an open-source framework for producing the web applications in Java EE, based on MVC-2 architecture. It uses and extends the Java Servlet API. Struts are robust
Describe Logical Operators in Java ? The relational operators you've learned so far ( , >=, !=, ==) are enough while you only required to check one condition. Therefore what if
What are parallel arrays?
The Action Class is type of the Model and is a wrapper around the business logic. The purpose of Action Class is to change the HttpServletRequest to the business logic. To use the
What are the different messaging paradigms JMS supports? Ans) Publish and Subscribe i.e. pub/suc and Point to Point i.e. p2p.
Question: (a) What are the main differences between an object and a class? Illustrate with appropriate examples. (b) Differentiate between a global variable and a local va
What is the difference between a while statement and a do while statement? A while statement checks at the starting of a loop to see whether the next loop iteration should occu
TextMessage having instance of java.lang.String as its payload. Therefore it is very useful for exchanging textual data. It can also be used for exchanging difficult character data
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