What is the use of the replace() method of the String class?

What is the use of the replace() method of the String class?

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The replace() method of the String class replaces a given character in a given string with a new character. The general syntax for this method is as follows:

public String replace(char oldChar, char newChar)

For example, Sting s="Hello";

Now the following syntax will replace all the l's in this string with m's:

s.replace('l', 'm');

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