Initial Checkin

DB/PostgreSqlExample copy.java

@@ -0,0 +1,44 @@
+/*
+Compile:
+javac PostgreSqlExample.java
+
+Run:
+java -cp postgresql-42.5.4.jar;. PostgreSqlExample
+
+*/
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+ 
+public class PostgreSqlExample {
+    public static void main(String[] args) {
+        try (Connection connection = DriverManager.getConnection("jdbc:postgresql://192.168.10.138:5432/example", "postgres", "postgres")) {
+ 
+            System.out.println("Java JDBC PostgreSQL Example");
+            // When this class first attempts to establish a connection, it automatically loads any JDBC 4.0 drivers found within 
+            // the class path. Note that your application must manually load any JDBC drivers prior to version 4.0.
+//          Class.forName("org.postgresql.Driver"); 
+ 
+            System.out.println("Connected to PostgreSQL database!");
+            Statement statement = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
+            statement.setFetchSize(10);
+            System.out.println("Reading records.");
+            //ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j limit (10)");
+            ResultSet resultSet = statement.executeQuery("SELECT * FROM test1 a, test1 b, test1 c, test1 d, test1 e, test1 f, test1 g, test1 h, test1 i, test1 j");
+            while (resultSet.next()) {
+                System.out.print(resultSet.getInt(1));
+                System.out.println("-"+ resultSet.getString(2));
+            }
+ 
+        } /*catch (ClassNotFoundException e) {
+            System.out.println("PostgreSQL JDBC driver not found.");
+            e.printStackTrace();
+        }*/ catch (SQLException e) {
+            System.out.println("Connection failure.");
+            e.printStackTrace();
+        }
+    }
+}