Matrix Addition,Matrix Multipliction

public static void main(String[] args) {

int[][] a= {{1,2,3}
            {1,2,3},
        {4,5,6}};

int[][] b= {{6,7,8},
        {1,2,3},
        {7,8,9}};
int [][] c=new int[a.length][a[0].length]; 

for(int row=0;row<a.length;row++)
{
    for(int col=0;col<b.length;col++)
    {   
      c[row][col]=a[row][col]+b[row][col];
      System.out.print(c[row][col]+" ");
    }
      System.out.println();
}

}

public static void main(String[] args) {

int[][] a= {{1,2,3},
        {1,2,3},
        {4,5,6}};
int[][] b= {{6,7,8},
        {1,2,3},
        {7,8,9}};
int [][] c=new int[a.length][a[0].length];
for(int row=0;row<a.length;row++)
{
  for(int col=0;col<b.length;col++)
  {
    for(int k = 0;k<b.length;k++)
    {
      c[row][col]=c[row][col]+(a[row][k]*b[k][col]);
    }
    System.out.print(c[row][col]+" ");
  }
     System.out.println();
}

}