Java 中的算法参数生成器 getProvider()方法，示例

原文:https://www . geesforgeks . org/algorithm parameter generator-get provider-method-in-Java-with-examples/

Java . security . algorithm parameter generator类的 getProvider() 方法用于返回该算法参数生成器对象的提供者。 语法:

public final Provider getProvider()

返回值:这个方法返回这个算法参数生成器对象的提供者。 以下是说明 getProvider()方法的示例: 示例 1: 对于算法 DSA

Java 语言(一种计算机语言，尤用于创建网站)

// Java program to demonstrate
// getAlgorithm() method

import java.security.*;
import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
    {
        try {
            // creating the object of
            // AlgorithmParameterGenerator
            // and getting instance
            // using getInstance() method
            AlgorithmParameterGenerator
                sr
                = AlgorithmParameterGenerator
                      .getInstance("DSA");

            // initializing the AlgorithmParameterGenerator
            // with 1024 using initialize() method
            sr.init(1024);

            // generating the Parameters
            // using getAlgorithm() method
            Provider pro = sr.getProvider();

            // printing the string algo
            System.out.println("Provider : " + pro);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output: 

Provider : SUN version 1.8

示例 2: 对于算法差分赫尔曼T4】

Java 语言(一种计算机语言，尤用于创建网站)

// Java program to demonstrate
// getAlgorithm() method

import java.security.*;
import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
    {
        try {
            // creating the object of
            // AlgorithmParameterGenerator
            // and getting instance
            // using getInstance() method
            AlgorithmParameterGenerator
                sr
                = AlgorithmParameterGenerator
                      .getInstance("DiffieHellman");

            // initializing the AlgorithmParameterGenerator
            // with 1024 using initialize() method
            sr.init(1024);

            // generating the Parameters
            // using getAlgorithm() method
            Provider pro = sr.getProvider();

            // printing the string algo
            System.out.println("Provider : " + pro);
        }

        catch (NoSuchAlgorithmException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ProviderException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output: 

Provider : SunJCE version 1.8

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