The toString() method of java.security.DigestInputStream class provide the object of DigestInputStream in string format.
Syntax:
public String toString()
Return Value: This method returns the object of DigestInputStream in string format.
Note : All the programs in this article won’t run on online IDE as no ‘name’ file exists. You can check this code on Java compiler on your system. To check this code, create a file ‘name’ on your system.
Below are the examples to illustrate the toString() method:
Example 1:
Java
// Java program to demonstrate// toString() methodimport java.security.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { try { // creating the object of MessageDigest // and getting instance // By using getInstance() method MessageDigest sr = MessageDigest.getInstance("MD5"); // creating and initializing // object of InputStream InputStream is = new FileInputStream("f:/java/name.txt"); // creating and initializing // object of DigestInputStream DigestInputStream di = new DigestInputStream(is, sr); // getting the string representation // of DigestInputStream // using toString() method String str = di.toString(); // display the result System.out.println("Status : " + str); } catch (NoSuchAlgorithmException e) { System.out.println("Exception thrown : " + e); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } catch (FileNotFoundException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Status : [Digest Input Stream] MD5 Message Digest from SUN,
Example 2:
Java
// Java program to demonstrate// toString() methodimport java.security.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { try { // creating the object of MessageDigest // and getting instance // By using getInstance() method MessageDigest sr = MessageDigest.getInstance("SHA-1"); // creating and initializing // object of InputStream InputStream is = new FileInputStream("f:/java/name.txt"); // creating and initializing // object of DigestInputStream DigestInputStream di = new DigestInputStream(is, sr); // getting the string // representation of DigestInputStream // using toString() method String str = di.toString(); // display the result System.out.println("Status : " + str); } catch (NoSuchAlgorithmException e) { System.out.println("Exception thrown : " + e); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } catch (FileNotFoundException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
Status : [Digest Input Stream] SHA-1 Message Digest from SUN,
Reference: https://docs.oracle.com/javase/9/docs/api/java/security/DigestInputStream.html#toString–
