Количество строк в resultSet

ResultSet rs = preparedStatement.executeQuery();
if (rs != null) {
    rs.last();
    int rsSize = rs.getRow();
    rs.beforeFirst();
    //...
}

List<Integer> list = new ArrayList<>();
long start = System.currentTimeMillis();
for (int i=0; i<5000; i++){
    list.add(i);
}
long end = System.currentTimeMillis();
System.out.println("Size="+list.size());
System.out.println("Time="+(end-start)+"ms");

package ru.skipy.tests;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
 
/**
 * ArrayListSpeedTest
 *
 * @author Eugene Matyushkin sks Skipy
 * @since 17.01.13
 */
public class ArrayListSpeedTest {
 
    public static void main(String[] args) throws Exception{
        List<Integer> list = new ArrayList<>();
        long start = System.currentTimeMillis();
        for (int i=0; i<6824; i++){
            list.add(i);
        }
        long end = System.currentTimeMillis();
        System.out.println("Size="+list.size());
        System.out.println("Time="+(end-start)+"ms");
 
        list = new ArrayList<>();
        start = System.currentTimeMillis();
        for (int i=0; i<168699; i++){
            list.add(i);
        }
        end = System.currentTimeMillis();
        System.out.println("Size="+list.size());
        System.out.println("Time="+(end-start)+"ms");
 
        oracle.jdbc.driver.OracleDriver.class.newInstance();
        Connection c = DriverManager.getConnection("jdbc:oracle:thin:@//host:1521/sid", "user", "password");
        PreparedStatement st = c.prepareStatement("select classified, label from account");
        ResultSet rs = st.executeQuery();
        List<Item> acct = new ArrayList<>();
        start = System.currentTimeMillis();
        while(rs.next()){
            acct.add(new Item(rs.getLong("classified"), rs.getString("label")));
        }
        end = System.currentTimeMillis();
        System.out.println("Items: "+acct.size());
        System.out.println("Time: "+(end-start)+"ms");
        rs.close();
        st.close();
 
        st = c.prepareStatement("select classified, label from doctree");
        rs = st.executeQuery();
        List<Item> docs = new ArrayList<>();
        start = System.currentTimeMillis();
        while(rs.next()){
            docs.add(new Item(rs.getLong("classified"), rs.getString("label")));
        }
        end = System.currentTimeMillis();
        System.out.println("Items: "+docs.size());
        System.out.println("Time: "+(end-start)+"ms");
        rs.close();
        st.close();
        c.close();
    }
 
    static class Item{
 
        private long classified;
        private String label;
 
        public Item(long classified, String label){
            this.classified = classified;
            this.label = label;
        }
 
    }
}