java - Get unique integer value from string -

i have different unique strings in same format. string looks axf25!j&809>-11~dc , want unique integer value string. each time value must same , depends on string. i've tried convert each char of string int , sum chars each other. in case if have 2 strings same set of symbols, return integer values equal each other. doesn't suit me. how can generate unique integer value unique string?

update:

having considered given solutions decided create function generate unique integer values. hope excludes collisions.

public int getuniqueinteger(string name){     string plaintext = name;     int hash = name.hashcode();     messagedigest m;     try {         m = messagedigest.getinstance("md5");         m.reset();         m.update(plaintext.getbytes());         byte[] digest = m.digest();         biginteger bigint = new biginteger(1,digest);         string hashtext = bigint.tostring(10);         // need 0 pad if want full 32 chars.         while(hashtext.length() < 32 ){           hashtext = "0"+hashtext;         }         int temp = 0;         for(int =0; i<hashtext.length();i++){             char c = hashtext.charat(i);             temp+=(int)c;         }         return hash+temp;     } catch (nosuchalgorithmexception e) {         // todo auto-generated catch block         e.printstacktrace();     }     return hash; } 

you cannot generate entirely unique ints sufficiently long strings because there more 10-character strings 32-bit integers.

as far non-unique solutions go, can use standard hashcode function, implementation in java reasonably good. more complex stuff may consider computing cryptographic hash (sha-2, md5, etc.)