JavaPart1.java

JavaPart1.java - import import import import import import...

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import java.sql.*; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; public class JavaPart1{ //create all possible combinations in first scan and then update all //other values public static void main(String[] args) { //Put your user name and password here!! String usr ="userName"; String pwd ="password"; String url ="jdbc:postgresql://localhost:5432/postgres"; try { Class.forName("org.postgresql.Driver"); //System.out.println("Success loading Driver!"); } catch(Exception e) { System.out.println("Fail loading Driver!"); e.printStackTrace(); } try { Connection conn = DriverManager.getConnection(url, usr, pwd); //System.out.println("Success connecting server!"); Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery("SELECT * FROM Sales"); Map<String,ArrayList<String>> multiMap = new HashMap<String,ArrayList<String>>(); while (rs.next()) { //System.out.println(rs.getString("cust") + " " + rs.getString("prod") + " " + rs.getString("day") + " " + // rs.getString("month") + " " + rs.getString("year") + " " + rs.getString("quant")); if(multiMap.get(rs.getString("cust")+ "+" + rs.getString("prod")) == null) { String avg1 = rs.getString("quant"); // This is normal average String avg2 = "0"; // This is average for same cust but diff prod
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