CompareTo method Issues in Java

CompareTo method Principle: First read out the first "letter" of the string to compare, the method of comparison is the ASCII code table value (character corresponding to the decimal value), if the previous large then return 1, the back of the large return-1; This position is the same, continue to compare the next, until the last one, If all are the same, return 0;

Example:
int cc= "". CompareTo ("12");
System.out.println (CC);
int dd= "one". CompareTo ("12");
System.out.println (CC);
int dd= "AAA". CompareTo ("AAA");
System.out.println (CC);
The result is: 1 (newline)-1 (line break) 0.

CompareTo method Issues in Java