Middle Three Given a string of odd length, return a string made of the middle three characters. The string length will be at least $3.$ Example IOs middleThree$("$Candy$")$ "and" middleThree$("$and$")$ "and" middleThree$("$solving$")$ "Ivi" middleThree$("$xy$")$ null

middleThree$("$Candy$")$ "and"

middleThree$("$and$")$ "and"

middleThree$("$solving$")$ "Ivi"

$...$Save, Compile, Run $($ctrl$-$enter$)$

public String middleThree$($String $str$

int midindex $=$ str$.$ length $()\frac{?}{2}$;

return str$.$ substring$($midIndex $-1,$ midIndex $+2)$;

$\}$