Java Provider values()用法及代码示例

java.security.Provider类的values()方法用于返回此提供程序中包含的属性值的不可修改的Collection视图。

用法:

public Collection<Object> values()

返回值：此方法返回此映射中包含的值的集合视图。

下面是说明values()方法的示例：

示例1:

// Java program to demonstrate 
// values() 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 Signature 
            Signature sr = Signature.getInstance("SHA1withDSA"); 
  
            // getting the Provider of the  Signature sr 
            // by using method getProvider() 
            Provider provider = sr.getProvider(); 
  
            // Declaring the variable of set<Map> type 
            Collection<Object> value; 
  
            // getting unmodifiable Set view of the prperty value 
            value = provider.values(); 
  
            // Creating the object of iterator to iterate set 
            Iterator iter = value.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); 
        } 
    } 
}

输出：

unmodifiable Set view : 
 
Value is : SHA1withDSA
Value is : SHA1withDSA
Value is : SHA1withDSA
Value is : Software
Value is : sun.security.provider.JavaKeyStore$DualFormatJKS
Value is : SHA
Value is : sun.security.provider.SHA
Value is : sun.security.provider.JavaKeyStore$CaseExactJKS
Value is : Software
Value is : sun.security.provider.DSA$SHA256withDSA

示例2:

// Java program to demonstrate 
// values() 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 
            Collection<Object> value; 
  
            // getting unmodifiable Set view of the prperty value 
            value = provider.values(); 
  
            // Creating the object of iterator to iterate set 
            Iterator iter = value.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); 
        } 
    } 
}

输出：

unmodifiable Set view : 
 
Value is : SHA1withDSA
Value is : SHA1withDSA
Value is : SHA1withDSA
Value is : Software
Value is : sun.security.provider.JavaKeyStore$DualFormatJKS
Value is : SHA
Value is : sun.security.provider.SHA
Value is : sun.security.provider.JavaKeyStore$CaseExactJKS
Value is : Software
Value is : sun.security.provider.DSA$SHA256withDSA

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Provider values() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。