Java JDBC Savepoint And Rollback

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import java.sql.*;

public class JavaJDBCSavePointRollback {
	
	 public static void main(String[] args) throws Exception{
	      Class.forName("org.apache.derby.jdbc.ClientDriver");
	      Connection con = DriverManager.getConnection
	      ("jdbc:derby://localhost:1527/testDb","name","pass");
	      Statement stmt = con.createStatement();
	      String query1 = "insert into emp values(5,'name','job')";
	      String query2 = "select * from emp";
	      con.setAutoCommit(false);
	      Savepoint spt1 = con.setSavepoint("svpt1");
	      stmt.execute(query1);
	      ResultSet rs = stmt.executeQuery(query2);
	      int no_of_rows = 0;
	      while (rs.next()) {
	         no_of_rows++;
	      }
	      System.out.println("rows before rollback statement = "
	      + no_of_rows);
	      con.rollback(spt1);
	      con.commit();
	      no_of_rows = 0;
	      rs = stmt.executeQuery(query2);
	      while (rs.next()) {
	         no_of_rows++;
	      }
	      System.out.println("rows after rollback statement = "
	      + no_of_rows);
	   }
}
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