integer - Java toString method difference -

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this question has answer here:

i enjoy codefights @ moment , @ end of last fight found interesting. code in 2 cases (mine , opponent) said correct. there difference between source code:

return integer.tostring(character.getnumericvalue(ch1) + character.getnumericvalue(ch2));

and one:

return new integer(character.getnumericvalue(ch1)+ character.getnumericvalue(ch2)).tostring();

what key missing?

from javadoc https://docs.oracle.com/javase/7/docs/api/java/lang/integer.html

string tostring() returns string object representing integer's value.

static string tostring(int i) returns string object representing specified integer.


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