ObjectStreamField类的getOffset()方法 (ObjectStreamField Class getOffset() method)

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

  getOffset()方法在java.io包中可用。

• getOffset() method is used to get the offset of this ObjectStreamField field.

  getOffset()方法用于获取此ObjectStreamField字段的偏移量。

• getOffset() 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.

  getOffset()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• getOffset() method does not throw an exception at the time of returning offset.

  返回偏移量时， getOffset()方法不会引发异常。

Syntax:

句法：

    public int getOffset();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is int, it returns the offset of this ObjectStreamField.

方法的返回类型为int ，它返回此ObjectStreamField的偏移量。

Example:

例：

// Java program to demonstrate the example 
// of int getOffset() method 
// of ObjectStreamField
import java.io.*;
import java.util.*;
public class GetOffSetOfOSF {
public static void main(String[] args) {
// Instantiates ObjectStreamClass for Calendar
ObjectStreamClass o_sc = ObjectStreamClass.lookup(Calendar.class);
// By using getField() method is to get the field
// value from Calendar 
ObjectStreamField field1 = o_sc.getField("isTimeSet");
ObjectStreamField field2 = o_sc.getField("isSet");
// By using getOffset() method is to return
// the offset of the field
int field1_offset = field1.getOffset();
System.out.println("field1.getOffset(): " + field1_offset);
int field2_offset = field2.getOffset();
System.out.println("field2.getOffset(): " + field2_offset);
}
}

Output

输出量

field1.getOffset(): 5
field2.getOffset(): 1

翻译自: https://www.includehelp.com/java/objectstreamfield-getoffset-method-with-example.aspx