系統(tǒng)類identityHashCode()方法 (System class identityHashCode() method)

• identityHashCode() method is available in java.lang package.

  identityHashCode()方法在java.lang包中可用。

• identityHashCode() method is used to return the hashcode of the given object – By using this method the value of hashcode will be the same as the value of hashcode by using hashCode() method.

  identityHashCode()方法用于返回給定對象的哈希碼–通過使用此方法，哈希碼的值將與使用hashCode()方法的哈希碼的值相同。

• Let suppose, if we pass an object that holds null value then in that case, the value of hashCode will be 0.

  假設(shè)，如果我們傳遞一個持有null值的對象，則在這種情況下，hashCode的值將為0 。

• identityHashCode() method is a static method so this method is accessible with the class name too.

  identityHashCode()方法是靜態(tài)方法，因此也可以使用類名訪問此方法。

• identityHashCode() method does not throw any exception.

  identityHashCode()方法不會引發(fā)任何異常。

Syntax:

句法：

public static int identityHashCode(Object obj);

Parameter(s):

參數(shù)：

• obj – represent the object for which the hashcode is to be returned.

  obj –代表要為其返回哈希碼的對象。

Return value:

返回值：

The return type of this method is int, it returns the hashcode of the given argument.

此方法的返回類型為int ，它返回給定參數(shù)的哈希碼。

Example:

例：

// Java program to demonstrate the example of // identityHashCode () method of System Classimport java.lang.*; import java.io.*;public class IdentityHashCodeMethod {public static void main(String[] args) throws Exception {File file1 = new File("Java");File file2 = new File("Programming");// getting hashcodeint hcode1 = System.identityHashCode(file1);System.out.println(hcode1);// getting hashcodeint hcode2 = System.identityHashCode(file2);System.out.println(hcode2);} }

Output

輸出量

E:\Programs>javac IdentityHashCodeMethod.java E:\Programs>java IdentityHashCodeMethod 1018081122 242131142

翻譯自: https://www.includehelp.com/java/system-class-identityhashcode-method-with-example.aspx

總結(jié)

以上是生活随笔為你收集整理的Java System类identityHashCode（）方法及示例的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。