Thread: loop generate?

hi. i have a hashmap like this:
<key1, <1,3,6>>
<key2, <2,4,6>>
<key3, <4,7,9>>

and i want output like this:

key1, 1, key2, 2, key3, 4
key1, 1, key2, 2, key3, 7
key1, 1, key2, 2, key3, 9
key1, 1, key2, 4, key3, 4
key1, 1, key2, 4, key3, 7
key1, 1, key2, 4, key3, 9
key1, 1, key2, 6, key3, 4
key1, 1, key2, 6, key3, 7
key1, 1, key2, 6, key3, 9

the problem is: the integer-array is variable as the number of keys also... but i need every combination. how do i do so?

hi. here is my code.
the output is broken because the value is an array... is iterator the right way?! as said in the first post, i need to get every combination of the hash-values
sample input-text looks like this:

generic data = 1,2,3
generic test = a,b
generic rums = 12,13

import java.io.BufferedReader; 
import java.io.FileReader; 
import java.util.*; 
 
public class HashMapEx { 
 
    public static void main(String[] args) { 
        HashMap<String, String[]> metadata = new HashMap<String, String[]>();
 
        try { 
            // Opening file 
            // change "/Users/anyexample/input.txt" to path to your test file  
            BufferedReader in = new BufferedReader(new FileReader("test.txt"));
            // string buffer for file reading   
            String str;
 
            // reading line by line from file    
            while ((str = in.readLine()) != null) { 
                //split string from metafile at "="
 
				String[] splitarray = str.split("\\=");
				//remove whitespaces from inputfile...
 
				splitarray[0] = splitarray[0].trim();
				splitarray[1] = splitarray[1].trim();
 
				//test if splitted string starts with "generic"
				//here also the hashmap is filled with the data from generics!
				if (splitarray[0].startsWith("generic")){
					String[] subsplit1 = splitarray[0].split("\\s+");
					splitarray[0] = subsplit1[1];
 
 
 
					String[] subsplit2 = splitarray[1].split("\\,");
					//splitarray[1] = subsplit2;
					for (int index=0; index<subsplit2.length; index++){
							System.out.println(splitarray[0] + " " + subsplit2[index]);
					}
					// fill our hashmap with the wanted data...
					metadata.put(splitarray[0], subsplit2);
				//}
				}
 
			}
			System.out.println("found " + metadata.size() + " generics");
 
			Set set = metadata.entrySet();
			Iterator i = set.iterator();
 
			while(i.hasNext()){
			      Map.Entry me = (Map.Entry)i.next();
			      System.out.println(me.getKey() + " : " + me.getValue() );
    			}
 
 
            // Close buffered reader 
            in.close();
        } catch (Exception e) { 
            e.printStackTrace();
	    System.out.println("Datei nicht gefunden!");
            System.exit(1);
        } 
} 
}