java - Unable to store Database results into a Map -

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i have made query shown above fetched me folowing results 

mysql> select distinct category_id  , t1 ca +-------------+--------------------+ | category_id | t1                 | +-------------+--------------------+ |           1 | popcorn            | |           2 | popcorn            | |           3 | popcorn            | |           4 | popcorn            | |           5 | popcorn            | |           6 | popcorn            | |           7 | soft drinks        | |           8 | soft drinks        | |           9 | soft drinks        | |          10 | soft drinks        |

for each t1 coulmn , trying store category_id

so looks 

popcorn=[         1,         2,         3,         4,         5,         6, ]   softdrinks=[         7,         8,         9,         10,  ]

i have followed below approach accomplish 

map<string,linkedlist<integer>> categoryitemslist = new hashmap<string,linkedlist<integer>>();      preparedstatement stmt2 = connection.preparestatement("select distinct category_id  , t1 categories  ;");                    resultset rs2 = stmt2.executequery();             linkedlist<integer> llist = new linkedlist<integer>();             while(rs2.next())             {                 int category_id = (int)rs2.getint("category_id");                 llist.add(category_id);                 categoryitemslist.put(rs2.getstring("t1"), llist);             }

could please let me know whats mistake ??

the result obtained 

{      popcorn=[         1,         2,         3,         4,         5,         6,         7,         8,         9,         10,         11,         12,         13,         14,         15,         16,         17,         18,         19,         20,         21,         22,         23,         24,         25,         26,         27,         28,         29,         30,         31,         32,         33,         34,         35,         36,         37,         38,         39,         40,         41,         42,         43,         44,         45,         46,         47,         48,         49,         50     ],       softdrinks=[         1,         2,         3,         4,         5,         6,         7,         8,         9,         10,         11,         12,         13,         14,         15,         16,         17,         18,         19,         20,         21,         22,         23,         24,         25,         26,         27,         28,         29,         30,         31,         32,         33,         34,         35,         36,         37,         38,         39,         40,         41,         42,         43,         44,         45,         46,         47,         48,         49,         50     ],  }

right have single list contains fetched ids, , you're putting list every t1, while need create new list every unique t1 , add results corresponding list:

while (rs2.next()) {     int cid = rs2.getint("category_id");     string t1 = rs2.getstring("t1");      if (!categoryitemslist.containskey(t1)) {         categoryitemslist.put(t1, new linkedlist<integer>());     }       categoryitemslist.get(t1).add(cid); }

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