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📜  Java I/O-ObjectStream

📅  最后修改于: 2020-09-27 03:20:27             🧑  作者: Mango

Java-ObjectStream Class

ObjectStreamClass充当类的序列化描述符。此类包含名称和该类的serialVersionUID。

领域

Modifier and Type Field Description
static ObjectStreamField[] NO_FIELDS serialPersistentFields value indicating no serializable fields

方法

Modifier and Type Method Description
Class forClass() It returns the class in the local VM that this version is mapped to.
ObjectStreamField getField(String name) It gets the field of this class by name.
ObjectStreamField[] getFields() It returns an array of the fields of this serialization class.
String getName() It returns the name of the class described by this descriptor.
long getSerialVersionUID() It returns the serialVersionUID for this class.
Static ObjectStreamClass lookup(Class cl) It finds the descriptor for a class that can be serialized.
Static ObjectStreamClass lookupAny(Class cl) It returns the descriptor for any class, regardless of whether it implements Serializable.
String toString() It returns a string describing this ObjectStreamClass.

例

import java.io.ObjectStreamClass;
import java.util.Calendar;

public class ObjectStreamClassExample {
public static void main(String[] args) {

// create a new object stream class for Integers
ObjectStreamClass osc = ObjectStreamClass.lookup(SmartPhone.class);

// get the value field from ObjectStreamClass for integers
System.out.println("" + osc.getField("price"));

// create a new object stream class for Calendar
ObjectStreamClass osc2 = ObjectStreamClass.lookup(String.class);

// get the Class instance for osc2
System.out.println("" + osc2.getField("hash"));

}
}

输出：

I price
null