Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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(Java in Eclipse)
Write a method that returns the sum of all the elements in a specified column in a 2-D array using the following header:
public static int sumCol(int[][] m, int colIdx)
Included is a test class and a sample run
Transcribed Image Text:Test your program using the Test class
Sample run
First array:
14 11 13 12
18 15 13 13
19 16 15 17
Second array:
54 53 51 52
51 59 52 56
53 54 52 58
The sum of the first column in the first array is: 51
![Use the following class to test the methods you develop
public class Test {
public static void main (String[] args) {
{ 14, 11, 13, 12 },
{ 18, 15, 13, 13 },
{ 19, 16, 15, 17 } };
int [] [] ml
%3D
{ 54, 53, 51, 52 },
{ 51, 59, 52, 56 },
{ 53, 54, 52, 58 } };
int [] [] m2
System.out.println ("First array:");
displayArray (ml);
System.out.println ("Second array:");
displayArray (m2);
/* write simple code to test your method and use
displayArray to display the result if applicable
//write your methods code here.
public static void displayArray (int [) m) {
for (int r = 0; r < m.length; r++) {
for (int c = 0; c < m[r].length; c++)
System.out.print (m[r] [c] + " ");
System.out.println ();
For all questions, assume that we use only rectangular arrays (i.e., all rows have the same length).](https://content.bartleby.com/qna-images/question/cd4867d4-8ed0-437f-b40f-72981102d206/c80b5dc4-8d94-41d1-baef-e1e8928a35e6/w81v8e_processed.jpeg)
Transcribed Image Text:Use the following class to test the methods you develop
public class Test {
public static void main (String[] args) {
{ 14, 11, 13, 12 },
{ 18, 15, 13, 13 },
{ 19, 16, 15, 17 } };
int [] [] ml
%3D
{ 54, 53, 51, 52 },
{ 51, 59, 52, 56 },
{ 53, 54, 52, 58 } };
int [] [] m2
System.out.println ("First array:");
displayArray (ml);
System.out.println ("Second array:");
displayArray (m2);
/* write simple code to test your method and use
displayArray to display the result if applicable
//write your methods code here.
public static void displayArray (int [) m) {
for (int r = 0; r < m.length; r++) {
for (int c = 0; c < m[r].length; c++)
System.out.print (m[r] [c] + " ");
System.out.println ();
For all questions, assume that we use only rectangular arrays (i.e., all rows have the same length).
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