Things like `"a"+"b"+"c"` will automatically get turned into a StringBuilder by the Java compiler (or in that trivial case in-lined to a single string probably), so no need to use StringBuilder unless the string concatenation is split across multiple commands (e.g. in a for loop). My personal preference is for `"a"+"b"` because there is less noise than a sequence of `.append(...)` calls. No strong feelings though.