Please help with the following in JAVA a. Compute the sum of the digits in an integer.Example: for an integer equals to 2456, the sum would be 2+4+5+6=17.Hint: Convert the integer to a string or to an array of characters

let us see the code for the above problem :-

Answered: a. Compute the sum of the digits in an…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The Java code must have the structure as shoen in the picture: Develop with Java programming language a calculator (console application) that takes a number, a basic math operator ( + , - , * , / , % ), and a second number all from user input, and have it print the result of the mathematical operation. The mathematical operations should be wrapped inside of functions. Note: Do please use the provided source code template to implement your solution. The purpose of this problem is not only to assess the students' ability to build a valid implementation but also to assess the ability to read the Java code. Input: On single line a number, a basic math operator ( + , - , * , / , % ), and a second number all from user input. Output: On new line result of the mathematical operation. In the case of "Division by zero" you must printout the text message "Error". Example 1: 4 + 812 Example 2: 4 * 832 Example 3: 4 % 20 Example 4 4/0 Error Example 5: 4-10 -6
Describe how polymorphism enables you to program "in the general" rather than "in the specific"? Give some examples, not the ones used in the book (C++ How to Program by Paul J. Deitel, Harvey Deitel Tenth Edition).
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java 3 5 + 1 - Please remember, there are space(s) between operands/operators in the ex[1]pression. So your solution needs to think of this aspect. You will solve the problem as stated below:- (1) [Design a simple calculator that helps you solve the expression given. Please be reminded that you need to design the calculator and not use in-built math methods from the programming language library to solve the expression. Also at the end of the program as a comment mention the time and space complexity of your solution. Time and space complexity
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public static long fallingPower(int n, int k) (please use Java to solve) Python has the integer exponentation operator ** conveniently built in the language, whereas Java unfortunately does not offer that operator that would be mostly useless anyway in a language with fixed size integers that silently hide the overflows easily produced by integer exponentiation. (In both languages, the caret character ^ denotes the bitwise exclusive or operation that has bupkis to do with integer exponentiation.) In the related operation of falling power that is useful in many combinatorial formulas and denoted syntactically by underlining the exponent, each term that gets multiplied into the product is always one less than the previous term. For example, the falling power 83 is computed as 8 * 7 * 6 = 336. Similarly, the falling power 105 equals 10 * 9 * 8 * 7 * 6 = 30240. Nothing essential changes even if the base n is negative; the falling power (-4)5 is computed as -4 * -5 * -6 * -7 * -8 = -6720.…
For each of the following pairs of concepts that are used in Java explain similarities and differences and discuss when you would use one rather than the other. If there are important syntactic differences, method names, degrees of generalization possible or the like, then any code fragments you give in illustration should be as short as possible to make the desired point. (a) JApplet and simple Java applications (b) Vector<String> and arrays of strings (String []) (c) class, abstract class and interface
Please help me with this using java

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a. Compute the sum of the digits in an integer. Example: for an integer equals to 2456, the sum would be 2+4+5+6=17. Hint: Convert the integer to a string or to an array of characters