title: Convert hexadecimal string to hexadecimal integer in java
body: <p>I have hexadecimal String eg. "0x103E" , I want to convert it into integer.
  Means <code>String no = "0x103E";</code> 
     to <code>int hexNo = 0x103E;</code>
  I tried <code>Integer.parseInt("0x103E",16);</code> but it gives number format exception.
  How do I achieve this ?</p>