subSequence (int start, int end)

public synchronized CharSequence subSequence(int start, int end)

Returns a new character sequence that is a subsequence of this sequence.

public class StringBufferSubSequence {
    public static void main(String args[]){
        StringBuffer s1 = new StringBuffer("Hello how are you");  
        System.out.println(s1.subSequence(6, 9));
    }
}

Output

how

1. Throws IndexOutOfBoundsException, if start or end are negative, if end is greater than length(), or if start is greater than end.

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