hashCode two objects are () the same, equals () certainly is true, right?

Right, hashCode two objects (the) same, equals () is not necessarily true.

Code Example:

1 String str1 = "通话";
2 String str2 = "重地";
3 System.out.println(String.format("str1：%d | str2：%d",     str1.hashCode(),str2.hashCode()));
4 System.out.println(str1.equals(str2));

Results of the:

str1：1179395 | str2：1179395

false

Code Interpretation: It is clear that "talk" and "heavy" in hashCode () the same, however, equals () was true, because in the hash table, hashCode () that is equal to two hash values ​​of key-value pairs are equal, however, equal hash value, not necessarily produce the key-value pairs are equal.