Java中的提供程序 getVersion() 方法和示例

Java.security.Provider类的getVersion()方法用于返回此提供程序的版本号

句法：

public double getVersion()

返回值：此方法返回此提供程序的版本号。

下面是说明getVersion()方法的示例：

示例 1：

// Java program to demonstrate
// getVersion() method
  
import java.security.*;
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv) throws Exception
    {
  
        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();
  
            // getting the version of the provider using getVersion() method
            double version = provider.getVersion();
  
            // printing the string info
            System.out.println("version : " + version);
        }
  
        catch (NoSuchAlgorithmException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

version : 1.8

示例 2：

// Java program to demonstrate
// getVersion() method
  
import java.security.*;
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv) throws Exception
    {
  
        try {
            // creating the object of  KeyPairGenerator
            KeyPairGenerator sr = KeyPairGenerator.getInstance("DSA", "SUN");
  
            // getting the Provider of the KeyPairGenerator sr
            // by using method getProvider()
            Provider provider = sr.getProvider();
  
            // getting the version of the provider using getVersion() method
            double version = provider.getVersion();
  
            // printing the string info
            System.out.println("version : " + version);
        }
  
        catch (NoSuchAlgorithmException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

version : 1.8