I do not understand the behaviour of the String.index Of method.
String peter = "Peter Piper picked a peck of pickled pepper";
System.out.println("The number of p in the sentence is, " + peter.indexOf('p'));
Why is the output of p 8 and not 9? There are 9 P's in the sentence.
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.
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