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Provider get() method in Java
The value to which a key is mapped can be obtained using the get() method in the class java.security.Provider. This method requires a single parameter i.e. the key whose value is required. It returns the value to which the key is mapped or it returns null if there is no value to which the key is mapped.
A program that demonstrates this is given as follows −
Example
import java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) { try { SecureRandom sRandom = SecureRandom.getInstance("SHA1PRNG"); Provider p = sRandom.getProvider(); Set<Object> set = p.keySet(); Iterator i = set.iterator(); int x = 30; while (x > 0) { Object val = p.get(i.next()); System.out.println(val); x--; } } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } } }
The output of the above program is as follows −
Output
SHA1withDSA SHA1withDSA SHA1withDSA Software sun.security.provider.JavaKeyStore$DualFormatJKS SHA sun.security.provider.SHA sun.security.provider.JavaKeyStore$CaseExactJKS Software sun.security.provider.DSA$SHA256withDSA SHA SHA1withDSA Software Software Software sun.security.provider.DSA$RawDSA X.509 java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey sun.security.provider.certpath.IndexedCollectionCertStore sun.security.provider.Sun SHA SHA1withDSA sun.security.provider.DomainKeyStore$DKS Software SHA256withDSA SHA224withDSA 1024 1024 Software sun.security.provider.DSAKeyFactory
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