java中字符串数组、字符串、调用split方法后长度比较

    String temp2 = "";
                String[] temp = temp2.split(",");
                String[] temp3 = {};
                
                System.out.println("............................."+temp2.length());
                System.out.println("***************"+temp.length);
                System.out.println("-----------------"+temp3.length);