ObjectStreamClass類lookup()方法 (ObjectStreamClass Class lookup() method)

• lookup() method is available in java.io package.

  lookup()方法在java.io包中可用。

• lookup() method is used to lookup the descriptor for a class that can be serialized.

  lookup()方法用于查找可以序列化的類的描述符。

• lookup() method is a static method, it is accessible with the class name and if we try to access the method with the class object then we will not get any error.

  lookup()方法是一個(gè)靜態(tài)方法，可以使用類名進(jìn)行訪問，如果嘗試使用類對(duì)象訪問該方法，則不會(huì)出現(xiàn)任何錯(cuò)誤。

• lookup() method does not throw an exception at the time of lookup descriptor.

  lookup()方法在查找描述符時(shí)不會(huì)引發(fā)異常。

Syntax:

句法：

public static ObjectStreamClass lookup(Class c);

Parameter(s):

參數(shù)：

• Class c – represents the class for which to lookup the descriptor.

  類c –表示要為其查找描述符的類。

Return value:

返回值：

The return type of the method is ObjectStreamClass, it returns the serial version UID of the class defined by this descriptor.

方法的返回類型為ObjectStreamClass ，它返回此描述符定義的類的序列版本UID。

Example:

例：

// Java program to demonstrate the example // of ObjectStreamClass lookup(Class c) method // of ObjectStreamClassimport java.io.*; import java.util.*;public class LookUp {public static void main(String[] args) {// Instantiates ObjectStreamClass for // and Calendar // By using lookup() method is to find the // descriptor for the class must implements// Serializable interfaceObjectStreamClass o_stm = ObjectStreamClass.lookup(Calendar.class);// By using getName() method is to// return the name for the classString name = o_stm.getName();// Display nameSystem.out.println("o_stm.getName(): " + name);} }

Output

輸出量

o_stm.getName(): java.util.Calendar

翻譯自: https://www.includehelp.com/java/objectstreamclass-lookup-method-with-example.aspx

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