What is the replace() method of the StringBuffer class?

The replace() method of the StringBuffer class replaces one set of characters with another set inside a StringBuffer object. The syntax of using the replace() method is as follows:

StringBuffer replace(int startIndex, endIndex, String str)

The substring, which is to be replaced, is specified by the indexes- startIndex and endIndex. The substring starting from startIndex to endIndex-1 is replaced. The substitute string is passed in str.

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