How can I pass a Class as parameter and return a generic collection in Java? -

I am preparing a simple data access object for my Java application. I have a few squares (records) that represent a line in tables like user and fruit .

Let me have a single method

For this time I like this: GetAllUsers () {...} public list & lt; Fruit & gt;

But I have to do a single polymorphous method like this:

  Public list & lt; T & gt; GetAllRecords (class  type) {if (user type example) {// select JDBC and SQL * from user) Otherwise (example of forest type) {// Use JDBC and SQL * Frames} use the return archive; }  

Example for use:

  list & gt; Fruit & gt; Fruit = myDataAccessObject.getAllRecrods (fruit class); & Lt; Users & gt; User = myDataAccessObject.getAllRecords (User.class);  

How can I do this in Java?

You say that you do not want you to have data access methods in different classes (Anish's answer In the comment), I thought why not try to do this.

  Public Class Records {Public Interface Recorder & lt; T & gt; {Public listing & lt; T & gt; GetRecords (); } Fixed recordphrase & lt; Fruit & gt; Fruit = new recordeter & lt; Fruit & gt; () {Public listing & gt; Fruit & gt; GetRecords () {...}}; Fixed recordphrase & lt; Users & gt; User = new recordeter & lt; Users & gt; () {Public listing & lt; Users & gt; GetRecords () {...}}; Public static zero main (string [] args) {list & lt; Fruit & gt; FruitRecords = Records.Fruit.getRecords (); & Lt; Users & gt; UserRecords = Records.User.getRecords (); }}  

Edit:

I would like to add another one of my implementations.

  public class test {public static zero main (string [] args) {test data entry = new test (); & Lt; Fruit & gt; FruitList = DataAccess.getAllRecords (Fruit.myType); & Lt; Users & gt; UserList = dataAccess.getAllRecords (User.myType); } & Lt; T & gt; & Lt; T & gt; GetAllRecords {T-CL} {List & lt; T & gt; List = New Arrestist & lt; T & gt; (); If (CAC crop) {// select JDBC and SQL * Use frames] and if (CL Instance of user) {// Select JDBC and SQL * urls) URL return list; }} Class fruit {fixed end result myType; Stable {myType = new fruit ();}} class user {fixed end user myType; Static {myType = new user}}}  

edit :

I think the implementation is the same as you did Have asked

  test of public class {public static zero main (string [] args throws InstantiationException, IllegalAccessException {test data entry = new test (); & Lt; Fruit & gt; FruitList = DataAccess.getAllRecords (Fruit.class); & Lt; Users & gt; UserList = dataAccess.getAllRecords (User.class); } & Lt; T & gt; & Lt; T & gt; GetAllRecords throws InstantiationException (class & lt; T & gt; CL); IllegalAccessException {t inst = cl.newInstance (); & Lt; T & gt; List = New Arrestist & lt; T & gt; (); If (for example fruit) {// Use JDBC and SQL * Select from the user] and if (for user example) {// select JDBC and SQL * from) Return of the fruit list; }}