Student in need of help

Hello,
Iam a new student to Oracle and SQL I need to find out what these symbols and terms do in this language. RUN START / @ GET. I was told that there are multiple purpose keys????
Please HELP
Thank you

These are actually SQL*PLUS commands, and not sql commands. SQL*Plus is Oracle's command line interface to sql.
@file_name Runs the specified command file
/          Runs the command currently in the buffer
GET        Loads the specified operating session file into
           the buffer
RUN        Lists and runs the command currently in the buffer
START      Is the same as @

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    // Full Code Below
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
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         /* Accessible Variables */
         private JPanel canvas;
         private JPanel mp;
         private JComboBox choice;
         private JButton reset;
         private Podly polyArray[] = new Podly[5];
         private Podly currentPoly = new Podly();
         private Podly movingPoly = new Podly();
         private int count;
         private Color currentColor;
         private Point firstPoint;
         private boolean newPoly = true;
         private boolean moving = false;
         private boolean overflowed = false;
         poly()
              setTitle("Polygon");
              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              count = 0;
              /* Interactive Buttons and Menus */
              JMenuBar tp = new JMenuBar();
              JMenu color = new JMenu("Color");
              JMenuItem MBlack = new JMenuItem("Black");
              color.add(MBlack);
              JMenuItem MRed = new JMenuItem("Red");
              color.add(MRed);
              JMenuItem MGreen = new JMenuItem("Green");
              color.add(MGreen);
              JMenuItem MYellow = new JMenuItem("Yellow");
              color.add(MYellow);
              MBlack.addActionListener(this);
              MRed.addActionListener(this);
              MGreen.addActionListener(this);
              MYellow.addActionListener(this);
              tp.add(color);
              canvas = new CanvasArt();
              canvas.setBackground(Color.white);
              canvas.addMouseListener(new Points());
              canvas.addMouseMotionListener(new Moved());
              choice = new JComboBox();
              choice.addItem("Black");
              choice.addItem("Red");
              choice.addItem("Green");
              choice.addItem("Yellow");
              choice.addActionListener(this);
              reset = new JButton("Reset");
              reset.addActionListener(this);
              JLabel chooseColor = new JLabel("Choose a color:");
              JLabel holdShift = new JLabel("Hold shift, click, and drag to move a polygon.");
              mp = new JPanel();
              mp.add(chooseColor);
              mp.add(choice);
              mp.add(reset);
              mp.add(holdShift);
              setJMenuBar(tp);
              getContentPane().add(canvas);
              getContentPane().add(mp, "South");          
         public static void main(String [] args)
              JFrame main = new poly();
              main.setSize(600, 600);
              main.setVisible(true);
         public void actionPerformed(ActionEvent e)
              Object test = e.getSource();
              Object selection;
              if (test instanceof JComboBox)
                   JComboBox source = (JComboBox)e.getSource();
                   selection = source.getSelectedItem();
                   if (selection.equals("Black")) currentColor = Color.black;
                   else if (selection.equals("Red")) currentColor = Color.red;
                   else if (selection.equals("Green")) currentColor = Color.green;
                   else if (selection.equals("Yellow")) currentColor = Color.yellow;
              else if (test instanceof JButton) // Repaints if Reset Button is Pressed
                   repaint();
                   currentPoly.reset();
                   count = 0;
                   overflowed = false;
              else
                   JMenuItem source = (JMenuItem)e.getSource();
                   selection = source.getText();
                   if (selection.equals("Black")) currentColor = Color.black;
                   else if (selection.equals("Red")) currentColor = Color.red;
                   else if (selection.equals("Green")) currentColor = Color.green;
                   else if (selection.equals("Yellow")) currentColor = Color.yellow;
         class Podly extends Polygon // Class adds Color Fuctionality to Polygon class
              Color polyColor;
              void setColor(Color y)
              {polyColor = y;}
              Color getColor()
              {return polyColor;}
         /* Canvas Painting Panel */
         class CanvasArt extends JPanel
              public void paintComponent(Graphics g)
                   super.paintComponent(g);
                   System.out.println("Canvas is called");
                   System.out.println(polyArray);
                   for (int i=0; i>count;i++)
                        System.out.println("Loop is going");
                        Podly y = polyArray;
                        g.setColor(y.getColor());
                        g.fillPolygon(y);
                        System.out.println(y);
                        System.out.println("Loop has filled in polygon"); // Test
                   System.out.println("painting complete");
         class Points extends MouseAdapter
              public void mousePressed(MouseEvent e)
                   Graphics g = canvas.getGraphics();
                   if (overflowed) // Checks for overflow in program.
                        g.setColor(Color.RED);
                        Font font = new Font("SansSerif",Font.BOLD, 30);
                        g.setFont(font);
                        g.drawString("OVERFLOW", 10, 30);
                        Font font2 = new Font("SansSerif",Font.BOLD, 20);
                        g.setFont(font2);
                        g.setColor(Color.BLUE);
                        g.drawString("Double Click to Play Again", 10, 50);
                        if (e.getClickCount() == 2) // Allows user to play again.
                             repaint();
                             currentPoly.reset();
                             count = 0;
                             overflowed = false;
                   else
                        int x = e.getX();
                        int y = e.getY();
                        if (newPoly)
                             firstPoint = new Point(x,y);
                             if (e.isShiftDown())
                                  System.out.println("Gets before Check loop");
                                  for (int r=count-1;r>=0;r--)
                                       System.out.println("Inside For Check Loop");
                                       System.out.println(polyArray[r]);
                                       if (!polyArray[r].contains(x,y))          
                                            System.out.println("Point is found");
                                            movingPoly = polyArray[r];
                                            System.out.println("MovingPoly Defined");
                                            moving = true;
                                            System.out.println("Moving is true"); // test
                                            break;
                             else
                                  currentPoly.setColor(currentColor);
                                  currentPoly.addPoint(x,y);
                                  g.fillOval(x,y,1,1);
                                  newPoly = false;
                        else
                             if (e.getClickCount() == 2)
                                  g.setColor(currentPoly.getColor());
                                  g.fillPolygon(currentPoly);
                                  polyArray[count] = currentPoly;
                                  currentPoly.reset();
                                  count++;
                                  if (count == polyArray.length)
                                  {overflowed = true;}
                                  newPoly = true;
                             else
                                  g.setColor(currentPoly.getColor());
                                  currentPoly.addPoint(x,y);
                                  g.drawLine(firstPoint.x, firstPoint.y, x, y);
                                  firstPoint.move(x,y);
              public void mouseReleased(MouseEvent e)
                   if(e.isShiftDown())
                   { moving = false; }
         class Moved extends MouseMotionAdapter
              public void mouseDragged(MouseEvent e)
                   if (moving && e.isShiftDown())
                        int x = e.getX();
                        int y = e.getY();
                        System.out.println("Gets here");
                        movingPoly.translate((x-firstPoint.x),(y-firstPoint.y));
                        firstPoint.move(x,y);
                        canvas.repaint();

    Here is the updated code still with the color error I talked about above.
    :) Thanks for all the help everyone.
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    public class poly extends JFrame implements ActionListener
         /* Accessible Variables */
         private JPanel canvas;
         private JPanel mp;
         private JComboBox choice;
         Podly [] polyArray;
         private Podly currentPoly;
         private Podly movingPoly;
         private int count;
         private Color currentColor;
         private Point firstPoint;
         private Color polyColor;
         private boolean newPoly = true;
         private boolean moving = false;
         private boolean overflowed = false;
         poly()
              setTitle("Polygon");
              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  // Exits program on window close.
              polyArray = new Podly[5];
              count = 0;                                      // Set count to zero.
              /* Interactive Buttons and Menus */
              JMenuBar tp = new JMenuBar();
              JMenu color = new JMenu("Color");
              JMenuItem MBlack = new JMenuItem("Black");
              color.add(MBlack);
              JMenuItem MRed = new JMenuItem("Red");
              color.add(MRed);
              JMenuItem MGreen = new JMenuItem("Green");
              color.add(MGreen);
              JMenuItem MYellow = new JMenuItem("Yellow");
              color.add(MYellow);
              MBlack.addActionListener(this);
              MRed.addActionListener(this);
              MGreen.addActionListener(this);
              MYellow.addActionListener(this);
              tp.add(color);
              canvas = new CanvasArt();
              canvas.setBackground(Color.white);
              canvas.addMouseListener(new Points());
              canvas.addMouseMotionListener(new Moved());
              choice = new JComboBox();
              choice.addItem("Black");
              choice.addItem("Red");
              choice.addItem("Green");
              choice.addItem("Yellow");
              choice.addActionListener(this);
              JLabel chooseColor = new JLabel("Choose a color:");
              JLabel holdShift = new JLabel("Hold shift, click, and drag to move a polygon.");
              mp = new JPanel();
              mp.add(chooseColor);
              mp.add(choice);
              mp.add(holdShift);
              setJMenuBar(tp);
              getContentPane().add(canvas);
              getContentPane().add(mp, "South");          
         /* Button Listeners */
         public void actionPerformed(ActionEvent e)
              Object test = e.getSource();
              Object selection;
              if (test instanceof JComboBox)
                   JComboBox source = (JComboBox)e.getSource();
                   selection = source.getSelectedItem();
                   if (selection.equals("Black")) currentColor = Color.black;
                   else if (selection.equals("Red")) currentColor = Color.red;
                   else if (selection.equals("Green")) currentColor = Color.green;
                   else if (selection.equals("Yellow")) currentColor = Color.yellow;
              else
                   JMenuItem source = (JMenuItem)e.getSource();
                   selection = source.getText();
                   if (selection.equals("Black")) currentColor = Color.black;
                   else if (selection.equals("Red")) currentColor = Color.red;
                   else if (selection.equals("Green")) currentColor = Color.green;
                   else if (selection.equals("Yellow")) currentColor = Color.yellow;
         class Podly extends Polygon  // Class adds Color Fuctionality to Polygon class
              void setColor(Color y)  // sets the Polygon's color.
              {polyColor = y;}
              Color getColor()   // returns the Polygon's color.
              {return polyColor;}
         /* Canvas Painting Panel */
         class CanvasArt extends JPanel
              public void paintComponent(Graphics g)
                   super.paintComponent(g);
                        for (int i=0; i<count;i++)
                             g.setColor(polyArray.getColor());
                             g.fillPolygon(polyArray[i]);
         class Points extends MouseAdapter
              /* Listens for mouse press, constructs polygons, stores them in array. */
              public void mousePressed(MouseEvent e)
                   Graphics g = canvas.getGraphics();
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                        g.setColor(Color.RED);
                        Font font = new Font("SansSerif",Font.BOLD, 30);
                        g.setFont(font);
                        g.drawString("OVERFLOW", 10, 30);
                        Font font2 = new Font("SansSerif",Font.BOLD, 20);
                        g.setFont(font2);
                        g.setColor(Color.BLUE);
                        g.drawString("Double Click to Play Again", 10, 50);
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                             repaint();
                             count = 0;
                             overflowed = false;
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                        int x = e.getX();
                        int y = e.getY();
                        if (newPoly)
                             firstPoint = new Point(x,y);
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                                  for (int r=count-1;r>=0;r--)
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              public void mouseReleased(MouseEvent e)
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