Question

how do i do this in basic java without using hashmat or anything complicated

Two-Dimensional Arrays. Write the three functions described below. Demonstrate that your code works by calling each function and printing out the results. All of your code should be in one file. Upload your java code and a file containing the output of running your program to show that it works.

Write a function called create2DIntArray that creates a two-dimensional array of integers between 0 and 10. The array should have r rows and c columns. Both r and c are passed to the function. The function should return the address of the array that it creates.

Write a function called getMax2D that return the highest value in a two-dimensional array that is passed to the function.

Write a function called indexOFRow2D that returns the row that a target value is found in or it returns -1 if target is not in the array. The array and target are passed to the function.

Answer 1

import java.util.Random;

public class TwoDimensionalArrays {

public static void main(String[] args) {

int arr[][] = create2DIntArray(5, 5);

int max = getMax2D(arr);

System.out.println("Max element in 2D array : " + max);

int tar = 5;

int index = indexOFRow2D(arr, tar);

System.out.println("Index of " + tar + " in 2D array " + index);

}

private static int indexOFRow2D(int[][] aArr, int tar) {

for (int i = 0; i < aArr.length; i++)

for (int j = 0; j < aArr[i].length; j++) {

if (aArr[i][j] == tar) {

return i;

}

}

return -1;

}

private static int getMax2D(int[][] aArr) {

int max = -1;

for (int i = 0; i < aArr.length; i++)

for (int j = 0; j < aArr[i].length; j++) {

if (aArr[i][j] > max) {

max = aArr[i][j];

}

}

return max;

}

private static int[][] create2DIntArray(int aI, int aI2) {

int arr[][] = new int[aI][aI2];

Random r = new Random();

for (int i = 0; i < aI; i++) {

for (int j = 0; j < aI2; j++) {

arr[i][j] = r.nextInt(11);

}

}

return arr;

}

}