The getProvider() method of java.security.KeyStore class is used to get the Provider associated with this KeyStore instance. Syntax:
public final Provider getProvider()
Parameter: This method accepts nothing as a parameter. Return Value: This method returns the Provider associated with 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 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 getProvider() method: Example 1:
// Java program to demonstrate getProvider() 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 the provider
// using getProvider() method
Provider provider = sr.getProvider();
// display the result
System.out.println("Provider : "
+ provider);
}
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 Without Loading keystore
// Java program to demonstrate getProvider() 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");
// getting the provider
// using getProvider() method
Provider provider = sr.getProvider();
// display the result
System.out.println("Provider : "
+ provider);
}
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);
}
}
}