Question

To add different objects from the database to an ArrayList this is the code that I use:

try {
    Statement stat = con.createStatement();
    ResultSet rs = stat.executeQuery("SELECT DISTINCT Id, Username, FirstName, LastName FROM USER WHERE Username LIKE '%"+name+"%' or FirstName LIKE '%"+name+"%' or LastName LIKE '%"+name+"%'");
    while (rs.next()){
        finded.setUsername(rs.getString("Username"));
        finded.setFirstName(rs.getString("FirstName"));
        finded.setLastName(rs.getString("LastName"));
        finded.setId(rs.getInt("Id"));
        findList.add(finded);
        Log.d("this is the content of the List:",((Integer) findList.get(j).getId()).toString());
        Log.d("this is the content of the List 0:",((Integer) findList.get(0).getId()).toString());

    }
    con.close();

And this is what the Log.d gives me each time.

10-18 08:31:39.407: D/this is the content of the List:(427): 3
10-18 08:31:39.407: D/this is the content of the List 0:(427): 3
10-18 08:31:39.427: D/this is the content of the List:(427): 15
10-18 08:31:39.427: D/this is the content of the List 0:(427): 15
10-18 08:31:39.437: D/this is the content of the List:(427): 13
10-18 08:31:39.437: D/this is the content of the List 0:(427): 13
10-18 08:31:39.447: D/this is the content of the List:(427): 50
10-18 08:31:39.447: D/this is the content of the List 0:(427): 50
10-18 08:31:39.460: D/this is the content of the List:(427): 34
10-18 08:31:39.460: D/this is the content of the List 0:(427): 34
10-18 08:31:39.467: D/this is the content of the List:(427): 49
10-18 08:31:39.467: D/this is the content of the List 0:(427): 49
10-18 08:31:39.479: D/this is the content of the List:(427): 53
10-18 08:31:39.479: D/this is the content of the List 0:(427): 53

As you can see it copies the same object in all the position of the ArrayList. I tried also to do it with findList.add(index, finded) (index is an int who is incrementing) But I get the same result.

Answer 1

You need to create a new object for findedinside the loop

while (rs.next()){
    finded = new Finded();   // <<-- here
    finded.setUsername(rs.getString("Username"));

otherwise you just add the same object over and over again