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KeyPairGenerator getInstance() method in Java
A KeyPairGenerator object with the key pairs for a particular algorithm can be obtained using the getInstance() method in the class java.security.KeyPairGenerator. This method requires a single parameter i.e. the algorithm name and it returns the KeyPairGenerator object created.
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 { KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSA"); String algorithm = kpGenerator.getAlgorithm(); System.out.println("The Algorithm is: " + algorithm); } catch (NoSuchAlgorithmException e) { System.out.println("Error!!! NoSuchAlgorithmException"); } catch (ProviderException e) { System.out.println("Error!!! ProviderException"); } } }
Output
The Algorithm is: RSA
Now let us understand the above program.
A KeyPairGenerator object kpGenerator can be obtained using the getInstance() method. Then the algorithm is obtained using the getAlgorithm() method and it is displayed. A code snippet that demonstrates is given as follows −
try { KeyPairGenerator kpGenerator = KeyPairGenerator.getInstance("RSsA"); String algorithm = kpGenerator.getAlgorithm(); System.out.println("The Algorithm is: " + algorithm); }
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