Java SecureRandom getProvider()方法及示例

java.security.SecureRandom 类的 getProvider() 方法被用来返回这个SecureRandom对象的提供者。

语法

public final Provider getProvider()

返回值： 该方法返回该SecureRandom对象的提供者。

下面是说明getProvider()方法的例子。

例1 :

// Java program to demonstrate// getProvider() method  import java.security.*;import java.util.*;  public class GFG1 {    public static void main(String[] argv)    {        try {            // creating the object of SecureRandom            SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");              // getting the Provider of the SecureRandom sr            // by using method getProvider()            Provider provider = sr.getProvider();              // printing the provider name            System.out.println("Provider name : " + provider.getName());        }          catch (NoSuchAlgorithmException e) {              System.out.println("Exception thrown : " + e);        }    }}

输出:

Provider name : SUN

例2 :

// Java program to demonstrate// getProvider() method  import java.security.*;import java.util.*;  public class GFG1 {    public static void main(String[] argv)    {        try {            // creating the object of SecureRandom            SecureRandom srand = new SecureRandom(new byte[] { 1, 2, 3, 4 });              // getting the Provider of the SecureRandom sr            // by using method getProvider()            Provider provider = srand.getProvider();              // printing the provider name            System.out.println("Provider name : " + provider.getName());        }        catch (ProviderException e) {              System.out.println("Exception thrown : " + e);        }    }}

输出:

Provider name : SUN