Question

How to use Base64 to encode and decode a string in Java

Answer 1

import java.util.Base64;
 
public class Main {
    public static String Base64Encode(String str) {
        return Base64.getEncoder().encodeToString(str.getBytes());
    }
    public static String Base64Decode(String encodedString) {
        byte[] decodedBytes = Base64.getDecoder().decode(encodedString);
        
        return new String(decodedBytes);

    }
    public static void main(String args[]) {
        String str = "Java, object-oriented programming language";
        
        // Encode
        String encodedString = Base64Encode(str);
        System.out.println("Encoded String = " + encodedString); 
         
        // Decode
        String decodedString = Base64Decode(encodedString);
        System.out.println("Decoded String = " + decodedString);
         
         
    }
}
    
    
    
    
/*
run:
    
Encoded String = SmF2YSwgb2JqZWN0LW9yaWVudGVkIHByb2dyYW1taW5nIGxhbmd1YWdl
Decoded String = Java, object-oriented programming language
    
*/

 

 

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