Java 中的提供者 getVersion()方法，示例
原文:https://www . geesforgeks . org/provider-get version-method-in-Java-with-examples/
java.security.Provider 类的 getVersion() 方法用于返回该提供程序的版本号
语法:
public double getVersion()
返回值:这个方法返回这个提供者的版本号。
以下是说明 getVersion() 方法的例子:
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);
}
}
}
Output:
version : 1.8
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);
}
}
}
Output:
version : 1.8
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