Question: In java, create a method named repeatChars() whihc takes a String str as a parameter and returns a new String will have the same characters

In java, create a method named repeatChars() whihc takes a String str as a parameter and returns a new String will have the same characters as str, but the first character of str is repeated one time, the second character is repeated 2 times and so on till the last character of str.

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