Java中的Provider toString()方法及其示例

这个 toString() 方法 JAVA安全供应商 类用于返回包含此提供程序的名称和版本号的字符串。

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语法:

public String toString()

返回值: 此方法返回带有 名称和版本号 对于这个提供者。

下面是一些例子来说明 toString() 方法:

例1:

// Java program to demonstrate
// getVersion() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
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();
// getting the name and version of the provider
// using toString() method
String nv = provider.toString();
// printing the string info
System.out.println( "Provider : " + nv);
}
catch (NoSuchAlgorithmException e) {
System.out.println( "Exception thrown : " + e);
}
}
}


输出:

Provider : SUN version 1.8

例2:

// Java program to demonstrate
// getVersion() method
import java.security.*;
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
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();
// getting the name and version of the provider
// using toString() method
String nv = provider.toString();
// printing the string info
System.out.println( "Provider : " + nv);
}
catch (NoSuchAlgorithmException e) {
System.out.println( "Exception thrown : " + e);
}
}
}


输出:

Provider : SUN version 1.8

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