Problem 2: Write a java program that contains:a) The method public static int numberOccurrences(int a, int b) which returns an integerdesignating the number of appearance of the digit b in the number a. (b must between0 and 9).b) Write a test program (main) that asks the user to enter an integer number and a digitthen invokes (calls) numberOccurrences method.Sample run 1:Enter a number: 11941.Enter a digit: 1The number of appearance of 1 in 11941 is 3Sample run 1:Enter a number: 257Enter a digit: 5 signmPilawjian DpointsClass commea class commProblem 1: A number n is considered to be triangular if we can find a sum of numbers in the range from 1 to nthat is equal to this n. So 10 is triangular because there is a sum resulting in 10: 1+2+3+4=10 and 4 <10,whereas 5 is not triangular because no sum from 1 to 5 can give 5 (1+2=3 less than 5 and 1+2+3 = 6 greaterthan 5).a- Define a method called is Triangular that verifies if a certain number passed as parameter is triangular ornot. The method header will be as follows:public static Boolean isTriangular(int num)b- Implement another method called displayTriangularNumbers that accepts an integer m as parameter anddisplays the first 10 triangular numbers starting from m. The method header will be as follows:public static void display TriangularNumbers (int m)c- Write a test program that asks the user to enter an integer a and invokes the methoddisplayTriangularNumbers passing a as argument to the method.Sample run 1:Enter an integer: 15The first 10 triangular numbers starting from 15 are:15 21 28 36 45 55 66 78 91 105

Dear Student, The source code, implementation and expected output of both problems is given below -

Problem 2: Write a java program that contains: a) The method public static int numberOccurrences(int a, int b) which returns an integer designating the number of appearance of the digit b in the number a. (b must between 0 and 9). b) Write a test program (main) that asks the user to enter an integer number and a digit then invokes (calls) numberOccurrences method.

Problem 2: Write a java program that contains: a) The method public static int numberOccurrences(int a, int b) which returns an integer designating the number of appearance of the digit b in the number a. (b must between 0 and 9). b) Write a test program (main) that asks the user to enter an integer number and a digit then invokes (calls) numberOccurrences method.

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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Question

Problem 2: Write a java program that contains:
a) The method public static int numberOccurrences(int a, int b) which returns an integer
designating the number of appearance of the digit b in the number a. (b must between
0 and 9).
b) Write a test program (main) that asks the user to enter an integer number and a digit
then invokes (calls) numberOccurrences method.
Sample run 1:
Enter a number: 11941.
Enter a digit: 1
The number of appearance of 1 in 11941 is 3
Sample run 1:
Enter a number: 257
Enter a digit: 5

signm
Pilawjian D
points
Class comme
a class comm
Problem 1: A number n is considered to be triangular if we can find a sum of numbers in the range from 1 to n
that is equal to this n. So 10 is triangular because there is a sum resulting in 10: 1+2+3+4=10 and 4 <10,
whereas 5 is not triangular because no sum from 1 to 5 can give 5 (1+2=3 less than 5 and 1+2+3 = 6 greater
than 5).
a- Define a method called is Triangular that verifies if a certain number passed as parameter is triangular or
not. The method header will be as follows:
public static Boolean isTriangular(int num)
b- Implement another method called displayTriangularNumbers that accepts an integer m as parameter and
displays the first 10 triangular numbers starting from m. The method header will be as follows:
public static void display TriangularNumbers (int m)
c- Write a test program that asks the user to enter an integer a and invokes the method
displayTriangularNumbers passing a as argument to the method.
Sample run 1:
Enter an integer: 15
The first 10 triangular numbers starting from 15 are:
15 21 28 36 45 55 66 78 91 105

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