Hashtable類hashCode()方法 (Hashtable Class hashCode() method)
hashCode() method is available in java.util package.
hashCode()方法在java.util包中可用。
hashCode() method is used to return the hash code value for this object in this Hashtable.
hashCode()方法用于返回此哈希表中此對象的哈希碼值。
hashCode() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
hashCode()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。
hashCode() method does not throw an exception at the time of returning hash code value.
hashCode()方法在返回哈希碼值時不會引發異常。
Syntax:
句法：
public int hashCode();
Parameter(s):
參數：
It does not accept any parameter.
它不接受任何參數。
Return value:
返回值：
The return type of the method is int, it returns hash code value of this Hashtable.
方法的返回類型為int ，它返回此Hashtable的哈希碼值。
Example:
例：
// Java program to demonstrate the example
// of int hashCode() method of Hashtable
import java.util.*;
public class HashCodeOfHashtable {
public static void main(String[] args) {
// Instantiate a hashtable object
Hashtable ht = new Hashtable();
// By using put() method is to
// add the linked values in an
// Hashtable ht
ht.put(10, "C");
ht.put(20, "C++");
ht.put(30, "JAVA");
ht.put(40, "PHP");
ht.put(50, "SFDC");
// Display Hashtable
System.out.println("Hashtable: " + ht);
// By using hashCode() method is to return
// the hash code of this Hashtable
int hash_code = ht.hashCode();
// Display hash code
System.out.println("ht.hashCode(): " + hash_code);
}
}
Output
輸出量
Hashtable: {10=C, 20=C++, 30=JAVA, 40=PHP, 50=SFDC}
ht.hashCode(): 4956940
翻譯自: https://www.includehelp.com/java/hashtable-hashcode-method-with-example.aspx
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