Java 中的 algorithm parameters getAlgorithm()方法,带示例

原文:https://www . geesforgeks . org/algorithm parameters-getalgorithm-method-in-Java-with-examples/

Java . security . algorithm parameters类的 getAlgorithm() 方法用于返回与此参数生成器关联的算法的标准名称。

语法:

public final String getAlgorithm()

返回值:该方法返回算法的字符串名称。

以下是说明 getAlgorithm() 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
            // AlgorithmParameters
            // and getting instance
            // using getInstance() method
            AlgorithmParameters sr
                = AlgorithmParameters
                      .getInstance("DSA");

            // generating the Parameters
            // using getAlgorithm() method
            String algo = sr.getAlgorithm();

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

        catch (NoSuchAlgorithmException e) {

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

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

Output: 

Algorithm: DSA

示例 2: 对于算法差分赫尔曼

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
            // AlgorithmParameters
            // and getting instance
            // using getInstance() method
            AlgorithmParameters sr
                = AlgorithmParameters
                      .getInstance("DiffieHellman");

            // generating the Parameters
            // using getAlgorithm() method
            String algo = sr.getAlgorithm();

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

        catch (NoSuchAlgorithmException e) {

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

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

Output: 

Algorithm: DiffieHellman

参考:T2【https://docs . Oracle . com/javase/9/docs/API/Java/security/algorithm parameters . html # getAlgorithm–T4】