- Java.io package classes
- Java.io - Home
- Java.io - BufferedInputStream
- Java.io - BufferedOutputStream
- Java.io - BufferedReader
- Java.io - BufferedWriter
- Java.io - ByteArrayInputStream
- Java.io - ByteArrayOutputStream
- Java.io - CharArrayReader
- Java.io - CharArrayWriter
- Java.io - Console
- Java.io - DataInputStream
- Java.io - DataOutputStream
- Java.io - File
- Java.io - FileDescriptor
- Java.io - FileInputStream
- Java.io - FileOutputStream
- Java.io - FilePermission
- Java.io - FileReader
- Java.io - FileWriter
- Java.io - FilterInputStream
- Java.io - FilterOutputStream
- Java.io - FilterReader
- Java.io - FilterWriter
- Java.io - InputStream
- Java.io - InputStreamReader
- Java.io - LineNumberInputStream
- Java.io - LineNumberReader
- Java.io - ObjectInputStream
- Java.io - ObjectInputStream.GetField
- Java.io - ObjectOutputStream
- io - ObjectOutputStream.PutField
- Java.io - ObjectStreamClass
- Java.io - ObjectStreamField
- Java.io - OutputStream
- Java.io - OutputStreamWriter
- Java.io - PipedInputStream
- Java.io - PipedOutputStream
- Java.io - PipedReader
- Java.io - PipedWriter
- Java.io - PrintStream
- Java.io - PrintWriter
- Java.io - PushbackInputStream
- Java.io - PushbackReader
- Java.io - RandomAccessFile
- Java.io - Reader
- Java.io - SequenceInputStream
- Java.io - SerializablePermission
- Java.io - StreamTokenizer
- Java.io - StringBufferInputStream
- Java.io - StringReader
- Java.io - StringWriter
- Java.io - Writer
- Java.io package extras
- Java.io - Interfaces
- Java.io - Exceptions
- Java.io package Useful Resources
- Java.io - Discussion
Java.io.ObjectStreamClass.lookup() Method
Description
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.
Declaration
Following is the declaration for java.io.ObjectStreamClass.lookup() method.
public static ObjectStreamClass lookup(Class<?> cl)
Parameters
cl − class for which to get the descriptor.
Return Value
This method returns the class descriptor for the specified class.
Exception
NA
Example
The following example shows the usage of java.io.ObjectStreamClass.lookup() method.
package com.tutorialspoint; 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()); } }
Let us compile and run the above program, this will produce the following result −
java.lang.Integer java.util.Calendar
java_io_objectstreamclass.htm
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