unicode

Hello, I want to divide all 256 Ascii characters in 16 blocks(array)(numbered from 1-10) where each array is of 4x4 and contain 16 characters. I wrote a code but in block 8,9,10 there is no actual values. please help me.

    for(int k=0;k<=15;k++ )
   {



        for(int i=0;i<=3;i++)

{ for(int j=0;j<=3;j++)

                    { 
        arr[k][i][j]=t;

        t++;  

                    }


        }
}

    for(int k=0;k<=15;k++ )
   {
System.out.println("Array no. : " + (k +1));
System.out.println();

    for(int i=0;i<=3;i++ )
   {

        for(int j=0;j<=3;j++)
        {

    t1=arr[k][i][j];

    System.out.print((char)t1);
    System.out.print("\t");
       }

    System.out.println();

 }