ObjectInputStream類registerValidation()方法 (ObjectInputStream Class registerValidation() method)

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

  registerValidation()方法在java.io包中可用。

• registerValidation() method is used to register an object (ob) to be validated before the graph is returned.

  registerValidation()方法用于在返回圖形之前注冊要驗證的對象(ob)。

• registerValidation() 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.

  registerValidation()方法是一種非靜態方法，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。

• registerValidation() method may throw an exception at the time of registering an object to validate.

  registerValidation()方法在注冊要驗證的對象時可能會引發異常。

  • NotActiveException: This exception may throw when the given parameters are not allowed to enable.NotActiveException ：如果不允許啟用給定參數，則可能引發此異常。
  • InvalidObjectException: This exception may throw when the given parameter is not valid.InvalidObjectException ：當給定參數無效時，可能引發此異常。

Syntax:

句法：

public void registerValidation(ObjectInputValiadation ob, int priority);

Parameter(s):

參數：

• ObjectInputValiadation ob – represents the object to get the validation callback.

  ObjectInputValiadation ob –表示要獲取驗證回調的對象。

• int priority – represents the priority by which based on ordering of callback.

  int priority –表示基于回調順序的優先級。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example // of void registerValidation(ObjectInputValiadation ob, // int priority) method of ObjectInputStreamimport java.io.*;public class RegisterValidation {public static void main(String[] args) {try {// Instantiates ObjectOutputStream , ObjectInputStream // FileInputStream and FileOutputStreamFileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");Drain obj_out_stm = new Drain(file_out_stm);FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);obj_out_stm.writeObject(new ReadObject());// By using readObject() method is to readReadObject a = (ReadObject) obj_in_stm.readObject();// Testing Validationsif (ReadObject.str.equals("Java Programmer")) {System.out.println("Validations Successful!!!");} else {System.out.println("Invalid Validations!!! ");}} catch (Exception ex) {ex.printStackTrace();}}static class ReadObject implements Serializable, ObjectInputValidation {static String str = "Java World!!!";private String readObject(ObjectInputStream ois)throws IOException, ClassNotFoundException {// By using readFields() method is to get fields ObjectInputStream.GetField get_f = ois.readFields();ois.registerValidation(this, 0);// Return strreturn (String) get_f.get("str", null);}@Overridepublic void validateObject() throws InvalidObjectException {throw new UnsupportedOperationException("Unsupported Validations!!!");}} }

Output

輸出量

Invalid Validations!!!

翻譯自: https://www.includehelp.com/java/objectinputstream-registervalidation-method-with-example.aspx

總結

以上是生活随笔為你收集整理的Java ObjectInputStream registerValidation（）方法与示例的全部內容，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站內容還不錯，歡迎將生活随笔推薦給好友。