Unable to increase the size of the array dynamically in java

I'm trying to increase the size of a two dimensional array dynamically .However,I'm getting an "Array out of Bounds"error it.Below posted is my code.In this scenario,I'm trying to add values dynamically to the two dimmensional vector "weight[][]" under some condition.Any Suggestions would be highly helpful!

class perceptron 
{
public static void main(String[] args)
 {


int[][] myPoints = {{2,3},{4,5},{7,8},{9,10}};
int [] classlabels = {1,1,-1,-1};
int [] [] weight = {{0,0}};
int base=0;

int i,j;
int activation=0;
for(i=0;i<myPoints.length;i++)
 { 
for(j=0;j<classlabels.length;j++)
 {

  activation = activation+((myPoints[i][0]*weight[i][0])+(myPoints[i]  
               [1]*weight[i][1]));

   System.out.println("dot product of two vectors" + activation);
     if((activation*classlabels[j]) <= 0)
      {
          System.out.println("hi");

          weight[i+1][0] = weight[i][0]+ (classlabels[j]*myPoints[i] 
                                  [0]);
          weight [i+1][1] =weight[i][1]+(classlabels[j]*myPoints[i] 
            [1]);

         System.out.println(weight[i+1][0]);
         System.out.println(weight[i+1][1]);

           base = base+classlabels[j];
          System.out.println(base);
         }

            }

             }
             }
              }