Update sqlite table attribute based on parameter / user selection

I have an sqlite database with table salesman with the following attribute:

----------------------
|code|name|isSelected|
----------------------

By default, each entry will have 0under the isSelected attribute. Logic is that User selects a Salesman by name in a JCombobox. Upon selection, the 0 in the selected Salesman under the isSelected attribute should be 1.

So example, given data entry of Salesman:

----------------------
|code|name|isSelected|
----------------------
|0001|John|0         |
----------------------

Then User selects John, so supposedly, the 0 should be updated to 1.

Here's my code in updating:

public void updateSalesman(String selection){  
    String updateQuery = "UPDATE SALESMAN SET isSelected = '1' WHERE name = 'selection'"; //problem here
    Connection connection = null;
    PreparedStatement ps = null;

    try{
        connection = DBConnection.getConnection();
        ps = connection.prepareStatement(updateQuery);
        ps.executeUpdate();

    }catch(Exception e){
        e.printStackTrace();            
    }        
}

I have the update query for making 0 to 1, but I dont know how to indicate in the method to only update 1 Salesman, based on the user's selection.