String2unicode.java

class Main {
  public static void main(String[] args) {
    System.out.println("Hello world!");
    String s = "abc";
    StringBuilder sb = new StringBuilder("`");
    for(char c: s.toCharArray()){
     sb.append(String.format("\\u%04X", (int)c));
    }
    sb.append('`');
    System.out.println(sb.toString());
  }
}