Store and retrieve Thai Data from HashMap

[Sri Ram]

Hi Ranchers,

I am facing a problem while storing and retrieving thai data in a hashmap. I have both the key and value as thai data. When I want to retrieve value from the hashmap giving the key as thai data, it is not fetching the value. I mean, no value is getting returned even though the data matches. I checked by giving the key as English data, its giving out the result properly.

I understand that there could be a difference while constructing a thai word, where the character sequence can be different. In this case how can I put and get data from a Hashmap.

This is the code example which i am using.

  
HashMap hm = new HashMap();
Hm.put(�กระบี่�, �เกาะลันตา�);
 
System.out.println(Hm.get(�กระบี่�));
 
 

[Ådne Brunborg]

This is what I did to test:

public class MyTestClass {
 
    public static void main(String[] args) {
        String a = "กระบี่"; //pasted from your "hm.put() line
        String b = "กระบี่"; //pasted from your "hm.get() line
        System.out.println("equals: " + a.equals(b));
        System.out.println("equalsIgnoreCase: " + a.equalsIgnoreCase(b));
 
        HashMap hm = new HashMap();
        hm.put("กระบี่", "เกาะลันตา");
        System.out.println("containsKey: " + hm.containsKey("กระบี่"));
        System.out.println("Should be null: " + hm.get("jalla"));
        System.out.println("Should be something:" + hm.get("กระบี่"));
    }
}    

and it generated the following output:

equals: true
equalsIgnoreCase: true
containsKey: true
Should be null: null
Should be something:???

I get a row of "?" instead of the thai characters, most likely since I don't have the character set installed. I don't know why it doesn't work at your end. It should, I think.

[Burkhard Hassel]

Hi ranchers,

perhaps �dne could you please check on your system, what values the question marks really stand for?

I thing the problem has nothing to do with HashMaps but with the encoding.
Sorry, I can't find a solution, but maybe have a look (or two) on this:

class Main {
public static void main(String[] args) {
String key="XY กระบี่";
showCharValues(key);
}
 
private static void showCharValues(String s) {
for (int i=0; i<s.length(); i++)
System.out.printf("i %d char %s value %d%n",
i, 
s.charAt(i), 
(int)s.charAt( i));
}
}

prints
i 0 char X value 88
i 1 char Y value 89
i 2 char value 32
i 3 char ? value 63
i 4 char ? value 63
i 5 char ? value 63
i 6 char ? value 63
i 7 char ? value 63
i 8 char ? value 63



All thai letters became int value 63!


Yours,
Bu.

---
At least Cthul where is
Providence Rhode Island

[Sri Ram]

Yeah even i was thinking its because of encoding.

My problem is when, i get the value from DB and make the key out of it. I dont know how it is stored in DB. and when i get from Hashmap using this DB data, its coming as null.



Then in that case, how do i put thai data into the hashmap. I dont have any primary key to use also.

[Ådne Brunborg]

Have you tried comparing the two strings - a.equals(b), where a is user input string and b is string read from database? If this returns false (which I think will happen), you should try to make a Key class congtaining the key strings, overriding the equals() method (where you compare the two and "manually" determines if they are equal or not). PS if you override equals you also need to override hashCode().

[Sri Ram]

Thanks all,

I found the problem in file reading. I didnt open the file with UTF-8.
what i was doing is, getting the values from File in normal encoding and puting into the hashmap. These values were going in junk. When i compare with valid thai value, its giving out null.