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Java basics

lookUp()


The java.io.ObjectStreamClass.lookup(Class cl) method finds the descriptor for a class that can be serialized. Creates an ObjectStreamClass instance if one does not exist yet for class. Null is returned if the specified class does not implement java.io.Serializable or java.io.Externalizable.

Syntax:
public static ObjectStreamClass lookup(Class cl)


Example:

import java.io.*;
import java.util.Calendar;

public class ObjectStreamClassDemo {

   public static void main(String[] args) {

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

      // get the name for Integers
      System.out.println("" + osc.getName());

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

      // get the name for Calendar
      System.out.println("" + osc2.getName());
   }
}


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