Returns a new string produced from s, in which
all occurences of oldSubstr are replaced with the newSubstr.
Tip:
You may call this function in a method-like style:
s.replace(oldSubstr, newSubstr)
replace("java.lang.Object", ".", "/")"java/lang/Object""Veni, vidi, vici".replace(",", " ->")"Veni -> vidi -> vici"