Swapping contents of an array of unequal columns -

i have question , far able create method sum values of integers in row , compare sum of other row, don't know how swap rows. help?

the question is:

write java program given two-dimensional array, reorders rows such row highest row sum first row.

if program called following array:

1 3 5 9 2 100 2 2 3 

then output should be:

2 100 1 3 5 9 2 2 3 

the following steps should performed:

1. calculate row sum
2. find index of row maximum sum
3. swap row of maximum sum row 0

---

public static void main(string[] args)  {     int [][] = {{1,3,5,9},{2,100},{2,2,3}};     int max = sum(0,a);     int index = 0;     (int = 1; < a.length; i++)     {         if( max < sum(i,a) )         {             max = sum (i,a);             index = i;         }     } }  public static int sum(int y, int[][]x) {     int sum = 0;     for(int j = 0; j<x[y].length; j++)         sum+= x[y][j];     return sum; } 

excuse insolence, have never written in java , cann't try - haven't tool, think, code should this

public static void main(string[] args)  {     int [][] = {{1,3,5,9},{2,100},{2,2,3}};     int max = sum(a[0]);     int index = 0;     (int = 1; < a.length; i++)     {         int t = sum(a[i]);         if( max < t )         {             max = t;             index = i;         }     }     if (index != 0) {        int tmp[] = a[0];        a[0] = a[index];        a[index] = tmp;      } }  public static int sum(int[]x) {     int sum = 0;     for(int j = 0; j<x.length; j++)         sum+= x[j];     return sum; }