Question

I need help with some java code concerning the comparison of two arrays.

Let's say I have two arrays. Array A and Array B. Array A has 7 integers on each line, and there are hundreds of lines. Array B is the same as Array A except every line of integers have been sorted in ascending order. In Array A there are already lines that are sorted, so some lines in Array A will be equal in Array B. What code could I write to I find out which lines in the arrays are equal and print only those lines out using the Arrays.equals method in java?

Answer 1

public class Array_equals

{

//Takes Array A and B and their size as rowA,rowB and column size as size

public static void Compare(int[][] A,int [][] B,int rowA,int rowB,int size)

{

//for each row in array A

for(int i=0;i<rowA;i++)

{

//for each row in array B

for(int j=0;j<rowB;j++)

{

//check is a flag, it is true

//only when all the elements are equal

boolean check=true;

//checking all the elements are equal or not

for(int k=0;k<size;k++)

{

if(A[i][k]!=B[j][k])

{

check=false;

break;

}

}

//if equal,print row number of A

if(check)

System.out.println(i);

}

}

}

//main method

public static void main(String args[])

{

//for simplisity, i passed only less size of arrays

int[][] arr1={{1,2,3},{2,3,4}};

int[][] arr2={{2,3,4},{3,4,5}};

Compare(arr1,arr2,2,2,3);

}

}