Question

For String c = ""Hello. She sells sea shells"";

The Java statements
int i = c.indexOf(""ll"");
int j = c.lastIndexOf(""ll"");
will result in:

a. i = 2 and j = 24.
b. i = 3 and j = 24.
c. i = 2 and j = 25.
d. i = 3 and j = 23."

Answer 1

The indexOf() method finds the first occurrence of "ll" at index 2, while lastIndexOf() finds the last occurrence at index 23 within the String. Therefore, the values of i and j are 2 and 23 respectively.

Step-by-step explanation:

In Java, the String methods indexOf() and lastIndexOf() are used to find the index position of a substring within a String. In the given statement String c = "Hello. She sells sea shells";, we are looking for the index of the substring "ll". Using indexOf(), we find the first occurrence, and with lastIndexOf(), we find the last occurrence of the substring.

The first occurrence of "ll" is in the word "Hello" which starts at index 2, hence i = 2. The last occurrence of "ll" is in the phrase "sells sea" and it starts at index 23, thus j = 23. Therefore, the correct answer would be that i = 2 and j = 23 which corresponds to option d.