Java Provider entrySet()用法及代码示例

// Java program to demonstrate 
// entrySet() method 
  
import java.security.*; 
import java.util.*; 
  
public class GFG1 { 
    public static void main(String[] argv) 
    { 
        // Declaring int value i 
        int i = 10; 
  
        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(); 
  
            // Declaring the variable of set<Map> type 
            Set<Map.Entry<Object, Object> > set; 
  
            // getting unmodifiable Set view of the property entries 
            set = provider.entrySet(); 
  
            // Creating the object of iterator to iterate set 
            Iterator iter = set.iterator(); 
  
            // printing the set elements 
            System.out.println("unmodifiable Set view : \n "); 
            while (i > 0) { 
                System.out.println("Value is : " + iter.next()); 
                i--; 
            } 
        } 
  
        catch (NoSuchAlgorithmException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
    } 
}

// Java program to demonstrate 
// entrySet() method 
  
import java.security.*; 
import java.util.*; 
  
public class GFG1 { 
    public static void main(String[] argv) throws Exception 
    { 
        // Declaring int value i 
        int i = 10; 
  
        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(); 
  
            // Declaring the variable of set<Map> type 
            Set<Map.Entry<Object, Object> > set; 
  
            // getting unmodifiable Set view of the property entries 
            set = provider.entrySet(); 
  
            // Creating the object of iterator to iterate set 
            Iterator iter = set.iterator(); 
  
            // printing the set elements 
            System.out.println("unmodifiable Set view : \n "); 
            while (i > 0) { 
                System.out.println("Value is : " + iter.next()); 
                i--; 
            } 
        } 
  
        catch (NoSuchAlgorithmException e) { 
  
            System.out.println("Exception thrown : " + e); 
        } 
    } 
}