KeyStore getCreationDate() method in Java with Examples

The getCreationDate() method of java.security.KeyStore class is used to get the date of creation of the specified entry with the help of the specified alias name. 

Syntax:

public final Date getCreationDate(String alias)
    throws KeyStoreException

Parameter: This method accepts the name of the alias as a parameter whose creation date is to be fetched. 

Return Value: This method returns the date of creation for the requested alias if it exists. 

Exception: This method throws KeyStoreException if you don’t initialize this keystore. 

Note: All the programs in this article won’t run on online IDE as no ‘privatekey’ Keystore exists. You can check this code on the Java compiler on your system. To check this code, create a Keystore ‘privatekey’ on your system and set your own keystore password to access that keystore. 

Below are the examples to illustrate the getCreationDate() method: 
Example 1:

Java

// Java program to demonstrate getCreationDate() method

import java.security.*;
import java.security.cert.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {

            // creating the object of KeyStore
            // and getting instance
            // By using getInstance() method
            KeyStore sr = KeyStore.getInstance("JKS");

            // keystore password is required to access keystore
            char[] pass = ("123456").toCharArray();

            // creating and initializing object of InputStream
            InputStream is
                = new FileInputStream(
                    "f:/java/private key.store");

            // initializing keystore object
            sr.load(is, pass);

            // getting date of Creation
            // using getCreationDate() method
            Date date
                = sr.getCreationDate("ftpkey");

            // display the result
            System.out.println("Creation date : "
                               + date.toString());
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (NullPointerException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (KeyStoreException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (FileNotFoundException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (IOException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (CertificateException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Example 2: For KeyStoreException

Java

// Java program to demonstrate getCreationDate() method

import java.security.*;
import java.security.cert.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {

            // creating the object of KeyStore
            // and getting instance
            // By using getInstance() method
            KeyStore sr = KeyStore.getInstance("JKS");

            // keystore password is required to access keystore
            char[] pass = ("123456").toCharArray();

            // creating and initializing object of InputStream
            InputStream is
                = new FileInputStream(
                    "f:/java/private key.store");

            // initializing keystore object
            // sr.load(is, pass);

            // getting date of Creation
            // using getCreationDate() method
            Date date
                = sr.getCreationDate("ftpkey");

            // display the result
            System.out.println("Creation date : "
                               + date.toString());
        }
        catch (FileNotFoundException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (NullPointerException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (KeyStoreException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Reference: https://docs.oracle.com/javase/9/docs/api/java/security/KeyStore.html#getCreationDate-java.lang.String-