Java SecureRandom getAlgorithm()方法及示例

java.security.SecureRandom 类的 getAlgorithm() 方法用于返回该SecureRandom对象实现的算法的名称。
语法：

public String getAlgorithm()

返回值： 该方法返回算法的名称，如果不能确定算法的名称，则返回未知值。
以下是说明 getAlgorithm()方法的例子：

例1：

// 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 SecureRandom
            SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
 
            // getting the Algorithm
            // by using method getAlgorithm()
            String algo = sr.getAlgorithm();
 
            // printing the string algo
            System.out.println("Algorithm: " + algo);
        }
 
        catch (NoSuchAlgorithmException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出

Algorithm: SHA1PRNG

例2：

// 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 SecureRandom
            SecureRandom sr = SecureRandom.getInstance("TAJMAHAL");
 
            // getting the Algorithm
            // by using method getAlgorithm()
            String algo = sr.getAlgorithm();
 
            // printing the string algo
            System.out.println(algo);
        }
 
        catch (NoSuchAlgorithmException e) {
 
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出

Exception thrown : java.security.NoSuchAlgorithmException: TAJMAHAL SecureRandom not available