Converting A String To Hexadecimal In Java

Question

I am trying to convert a string like \"testing123\" into hexadecimal form in java. I am currently using BlueJ.

And to convert it back, is it the same thing except b

Answer 1

A short and convenient way to convert a String to its Hexadecimal notation is:

public static void main(String... args){
String str = "Hello! This is test string.";
char ch[] = str.toCharArray();
StringBuilder sb = new StringBuilder();
    for (int i = 0; i < ch.length; i++) {
        sb.append(Integer.toHexString((int) ch[i]));
    }
    System.out.println(sb.toString());
}