How about...
final StringBuilder stringBuilder = new StringBuilder();
for (int y = 0; y < 26; y++) {
for (int w = 0; w < letterData[y]; w++) {
...
Type: Posts; User: Json
How about...
final StringBuilder stringBuilder = new StringBuilder();
for (int y = 0; y < 26; y++) {
for (int w = 0; w < letterData[y]; w++) {
...