[Solved] String.indexOf gives a value one less than expected

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Indexes are zero-based:

        ↓
Peter Piper picked a peck of pickled pepper
          111111111122222222223333333333444
0123456789012345678901234567890123456789012
        ↑

The first p is at index 8.

From the javadoc of indexOf():

Returns the index of the first occurrence of the character in the character sequence represented by this object, or -1 if the character does not occur.

solved String.indexOf gives a value one less than expected