Chapter 7. PC #16. 2D Array Operations Write a JAVA program that creates a two-d
ID: 3741383 • Letter: C
Question
Chapter 7. PC #16. 2D Array Operations
Write a JAVA program that creates a two-dimensional array initialized with test data. Use any primitive data type that you wish. The program should have the following methods:
• getTotal. This method should accept a two-dimensional array as its argument and return the total of all the values in the array.
• getAverage. This method should accept a two-dimensional array as its argument and return the average of all the values in the array.
• getRowTotal. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The method should return the total of the values in the specified row.
• getColumnTotal. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a column in the array. The method should return the total of the values in the specified column.
• getHighestInRow. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the
subscript of a row in the array. The method should return the highest value in the specified row of the array.
• getLowestInRow. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The method should return the lowest value in the specified row of the array.
Demonstrate each of the methods in this program.
View required output
Row 0 total: 1012.55
Row 1 total: 1802.0
Row 2 total: 814.33 Row 3 total: 1012.55
Row 4 total: 1802.0
Row 5 total: 814.33
Row 6 total: 1012.55
Row 7 total: 1802.0
Row 8 total: 814.33
Column 0 total: 4706.3099999999995
Column 1 total: 5404.26
Column 2 total: 776.07
Array total: 10886.64
Explanation / Answer
package org.students;
import java.util.Scanner;
public class TwoDarray {
public static void main(String[] args) {
double nos[][]=new double[3][3];
double rowTot=0,colTot=0,rowHighest,rowlowest;
/*
* Creating an Scanner class object which is used to get the inputs
* entered by the user
*/
Scanner sc = new Scanner(System.in);
for(int i=0;i<nos.length;i++)
{
for(int j=0;j<nos[0].length;j++)
{
System.out.print("Enter Element ("+i+","+j+") :");
nos[i][j]=sc.nextInt();
}
}
double tot=getTotal(nos);
double average=getAverage(nos);
for(int i=0;i<nos.length;i++)
{
rowTot=getRowTotal(nos,i);
System.out.println("Row "+i+" total:"+rowTot);
}
for(int i=0;i<nos.length;i++)
{
colTot=getColumnTotal(nos,i);
System.out.println("Column "+i+" total:"+colTot);
}
for(int i=0;i<nos.length;i++)
{
rowHighest=getHighestInRow(nos,i);
System.out.println("Row#"+(i)+" Highest :"+rowHighest);
}
for(int i=0;i<nos.length;i++)
{
rowlowest=getLowestInRow(nos,i);
System.out.println("Row#"+(i)+" Lowest :"+rowlowest);
}
}
//This method will calculate the minimum value in the Row
private static double getLowestInRow(double[][] nos, int row) {
double min=nos[row][0];
for(int i=0;i<nos.length;i++)
{
if(min>nos[row][i])
min=nos[row][i];
}
return min;
}
//This method will calculate the maximum value in the Row
private static double getHighestInRow(double[][] nos, int row) {
double max;
max=nos[row][0];
for(int i=0;i<nos.length;i++)
{
if(max<nos[row][i])
max=nos[row][i];
}
return max;
}
//This method will calculate the total of a column in 2-D array
private static double getColumnTotal(double[][] nos, int col) {
double tot=0;
for(int i=0;i<nos.length;i++)
{
tot=+nos[i][col];
}
return tot;
}
//This method will calculate the total of a row in 2-D array
private static double getRowTotal(double[][] nos, int row) {
double tot=0;
for(int i=0;i<nos.length;i++)
{
tot=+nos[row][i];
}
return tot;
}
//This method will calculate the average of 2-D array
private static double getAverage(double[][] nos) {
return ((double)(getTotal(nos)))/(nos.length+nos[0].length);
}
//This method will calculate the total of 2-D array
private static double getTotal(double[][] nos) {
double tot=0;
for(int i=0;i<nos.length;i++)
{
for(int j=0;j<nos[0].length;j++)
{
tot+=nos[i][j];
}
}
return tot;
}
}
___________________
Output:
Enter Element (0,0) :45
Enter Element (0,1) :56
Enter Element (0,2) :67
Enter Element (1,0) :78
Enter Element (1,1) :89
Enter Element (1,2) :54
Enter Element (2,0) :43
Enter Element (2,1) :32
Enter Element (2,2) :90
Row 0 total:67.0
Row 1 total:54.0
Row 2 total:90.0
Column 0 total:43.0
Column 1 total:32.0
Column 2 total:90.0
Row#0 Highest :67.0
Row#1 Highest :89.0
Row#2 Highest :90.0
Row#0 Lowest :45.0
Row#1 Lowest :54.0
Row#2 Lowest :32.0
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