Answer / mehtaashish

First of all an in appropriate main method will not cause any
compile time error, it results in a runtime exception. The
reason for this is that the main method's signature is written
as such in Java specification. And all the interpreters and
compiler and constructed while keeping language specification
in mind. So whenever we try to run a program JVM looks for
"public static void main(String args[])" for starting
execution. And if it does not find any main method, it throws
the "NoClassDefFoundException".

Answer / abcd

First of all an in appropriate main method will not cause any
compile time error, it results in a runtime exception.
i think reason is ase all know java program can run usingg
the same name as class name."String args[]" takes program
name as first argument that's why it gives run time exception.

what are the other loops except for for,while,do while and until?

0 Answers   Aricent,

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In java, why do we set thread priority, when we know that there is no guarantee by which a thread should be execute?

0 Answers   Google, Microsoft,

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is public static void main() work in java?is "String arg[]" needed as argument?

4 Answers   Tech Mahindra,

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write a program that inputs two real numbers then exchanges their values.

7 Answers   Infosys,

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Is there any static classes are in java give some examples

0 Answers  

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write a program that will ask the user to enter a number n and display the product of all numbers from 1 to n.

1 Answers  

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How Can I Trace A Java Program . Please Give Me Step by Step Process

1 Answers   IBM,

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write a program in java to solve a system of n-variabled simultaneous equations using the guassian elimination method. let the maximum possible value of n be 100. run the program using hypothetical values for a set of 10- variables simultaneous equations. print out the program, the input equation and the results generated by the program.

0 Answers   TCS,

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how to print a message to console without using main() function?(do not use even static blocks also.)

14 Answers   Google, Zoho,

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Financial: credit card number validation) Credit card numbers follow certain patterns. A credit card number must have between 13 and 16 digits. It must start with: ■ 4 for Visa cards ■ 5 for Master cards ■ 37 for American Express cards ■ 6 for Discover cards In 1954, Hans Luhn of IBM proposed an algorithm for validating credit card numbers. The algorithm is useful to determine whether a card number is entered correctly or whether a credit card is scanned correctly by a scanner. All credit card numbers are generated following this validity check, commonly known as the Luhn check or the Mod 10 check, which can be described as follows (for illustration, consider the card number 4388576018402626): 1. Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12 (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 2. Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 3. Add all digits in the odd places from right to left in the card number. 6 + 6 + 0 + 8 + 0 + 7 + 8 + 3 = 38 4. Sum the results from Step 2 and Step 3. 37 + 38 = 75 5. If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid. Write a program that prompts the user to enter a credit card number as a long integer. Display whether the number is valid or invalid. Design your program to use the following methods: /** Return true if the card number is valid */ public static boolean isValid(long number) /** Get the result from Step 2 */ public static int sumOfDoubleEvenPlace(long number) /** Return this number if it is a single digit, otherwise, return * the sum of the two digits */ public static int getDigit(int number) /** Return sum of odd place digits in number */ public static int sumOfOddPlace(long number) /** Return true if the digit d is a prefix for number */ public static boolean prefixMatched(long number, int d) /** Return the number of digits in d */ public static int getSize(long d) /** Return the first k number of digits from number. If the * number of digits in number is less than k, return

0 Answers  

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I am trying to pass the string firstName from a Servlet called SampleServet. I am running this on eclipse and it tells me that "the value for annotation attribute must be a constant expression. I don't understand why it is giving me this error. @PersonAnnotation(name = SampleServlet.firstName) public class AnnotationClass{

0 Answers  

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1+(2*3)+(4*5*6)+(7*8*9*10)+... specified input value

1 Answers   MAQ,

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