包類hashCode()方法 (Package Class hashCode() method)

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

  hashCode()方法在java.lang包中可用。

• hashCode() method is used to return the hashcode of the package calculated from the package name.

  hashCode()方法用于返回根據程序包名稱計算出的程序包的哈希碼。

• 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 hashcode of the package.

  hashCode()方法在返回包的哈希碼時不會引發異常。

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 this method is int, it returns the hashcode of the package determined by the package name.

此方法的返回類型為int ，它返回由包名稱確定的包的哈希碼。

Example:

例：

// Java program to demonstrate the example of int hashCode() // of Package methodpublic class Hashcode {public static void main(String[] args) {// Get Package by using getPackage() methodPackage pkg = Package.getPackage("java.util");// Get hashcode of the package by using // hashCode()int hc = pkg.hashCode();// Display hashcode of the packageSystem.out.print("Package hashcode: ");System.out.print("pkg.hashCode() = " + hc);} }

Output

輸出量

Package hashcode: pkg.hashCode() = -888372146

翻譯自: https://www.includehelp.com/java/package-hashcode-method-with-example.aspx

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