Check ia string is hexadecimal number or not

Check if a String is Hexadecimal number or not in java

  public boolean isHexNumber(String){
       boolean flag;
       try {
           int t = Integer.parseInt(value, 16);
            flag = true;
       } catch (NumberFormatException e) {
            flag = false;
       }
       return flag;
}
   

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