Which of the following methods in StringBuffer returns a substring based on the specified indices?a)substring()b)substr()c)subString()d)slice()

Breakdown the Problem

1. Identify the method in StringBuffer that returns a substring based on specified indices.
2. Evaluate the options given.

Relevant Concepts

• Understanding the StringBuffer class in Java and its methods for handling substrings.

Analysis and Detail

• StringBuffer has a method called substring(int startIndex, int endIndex) which allows extracting a portion of the string content from the specified starting index to the end index (exclusive).
• The other options (substr(), subString(), and slice()) either do not exist as methods in StringBuffer or are incorrectly named.

1. Option a: substring() - This is the correct method.
2. Option b: substr() - This method does not exist in StringBuffer.
3. Option c: subString() - This is incorrectly cased; the correct method is substring().
4. Option d: slice() - This is not a method of StringBuffer.

Verify and Summarize

After analyzing the options, the only valid method in StringBuffer that returns a substring based on specified indices is substring().

Final Answer

The correct method is a) substring().