Init-problem in swich-case

Question

I have to init the "a1" and "k" inside the if-advise, but I want use it outside the if-advise, too and there he can't resolve symbol....
case 1:
if(a1 == null){
//there is my problem!!!!!!!!
a1 = new String[100];
int k=0;
a1[k] = testResponse.substring(0,10);
System.out.println(a1[k]);
k++;                         
break;

Answer 1

perhaps it would be easier if there is a way to append String to an array like StringBuffer.append(String) or in "php" array[] .= string (there it gets the last index of the array, iterates it and then automatically appends the string..)
maybe if have to think about a completely different way to solve my problem...
String[] a0,a1;
switch(x){
case 0:
if(a0 == null){
a0 = new String[100];
int k1=0;
a0[k1] = testResponse.substring(0,10);
k1++;
break;
case 1:
if(a1 == null){
a1 = new String[100];
int k2=0;
a1[k2] = testResponse[i].substring(0,10);
k2++;
break;