[Solved] What will be the output of String.substring(String.length)?

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The JavaDoc for String.substring() states:

[throws] IndexOutOfBoundsException – if beginIndex is negative or larger than the length of this String object.

Since your beginIndex is equal to the length of the string it is a valid value and substring() returns an empty string.

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solved What will be the output of String.substring(String.length)?