Question

How to convert string to byte array in Java

Answer 1

import java.util.Arrays;

public class MyClass {
    public static void main(String args[]) { 
        String s = "abcd";

        byte[] arr = s.getBytes();
        
        System.out.println(Arrays.toString(arr));
    }
}



/*
run:

[97, 98, 99, 100]

*/

 

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Answer 2

import java.nio.charset.StandardCharsets;

public class MyClass {
    public static void main(String args[]) {
        String str = "Java";
        
        byte[] bytes = str.getBytes(StandardCharsets.US_ASCII);
        
        for (byte ch : bytes) {
            System.out.print(Integer.toHexString(ch) + " ");
        }
    }
}
 
 
 
 
/*
run:

4a 61 76 61 

*/

 

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