Can you give me information about indexOf () method please?

Question

String txt = "Please locate where 'locate' occurs!";
System.out.println(txt.indexOf("locate"));

it outputs 7. How this happens

Answer 1

The indexOf() returns the index of first occurrence of "locate" which begins at index 7.

Use this to return the last occurrence-
System.out.print(txt.lastIndexOf("locate"));

Answer 2

Ok, thanks