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javahashabsolute-value

Absolute value java

I am trying to create a directory with the name of the absolute value of the hexadecimal version of a hashed url, using the built-in hash() method of the String class. Now it is possible for hash() to produce a negative result, and a directory name starting with a minus sign is somewhat hard to handle which is why I need the absolute value of this. However, I cannot figure out how to get the absolute value of the hexadecimal version of the hashed url string.

Solution

  • The hex value never has a negative sign! It is just the hexadecimal representation of the two's compliment bit pattern of the value.

    System.out.println(Integer.toHexString(-1)); // ffffffff
System.out.println(Integer.toHexString(Integer.MIN_VALUE)); // 80000000

    Just like your mother always told you: "You're perfect just the way you are":

    String dirname = Integer.toHexString(dirname.hashCode()); // never has minus sign