Tom Reese

Yeah I agree, my table has a sequence as a primary key, PostgreSQL increments it automatically for me. I will try to figure out something else instead of using rs.last(). Thanks for your input!

Well for a moment there I thought I would have to sacrifice a goat to get this working but I finally found a guide that told me exactly what I needed, the guide found here http://jdbc.postgresql.org/documentation/80/binary-data.html uses deprecated methods but simply find the most recent ones which simply use a long type variable instead of a int. Sometimes you just need the right documentation and examples in which my case I did. I understand how file uploading works and it doesn't seem so complicated. Thanks for the suggestions to modularize the code, it made it more readable and easier to understand. Here is my working code... and thanks to everyone who replied, sometimes you just need a little criticism and suggestions. Thread solved, case closed! Code is still lengthy but is much more readable I think. This will be going up on my website!

/** * This method inserts a empty blob into the table row. This method executes first so * I can manipulate the oid large object in methods that need to access it. * @param con a connection object * @throws SQLException */ public void insertEmptyBlob(Connection con) throws SQLException{ SQLInsert = "insert into projects(project_files) values(lo_creat(-1));"; Statement st = con.createStatement(); st.executeUpdate(SQLInsert); } /** * This method processes the multi-part form fields and assigns the values to the proper variables. * @param req a http servlet request object * @throws ClassNotFoundException * @throws FileUploadException */ public void processMultiPartForm(HttpServletRequest req, Connection con) throws FileUploadException, IOException, SQLException{ LargeObject fileObject; FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); List<FileItem> items = upload.parseRequest(req); Iterator<FileItem> fieldItr = items.iterator(); //boolean isMultiPart = ServletFileUpload.isMultipartContent(req); while(fieldItr.hasNext()){ FileItem item = (FileItem)fieldItr.next(); if(item.isFormField()){ String currentField = item.getFieldName(); if(currentField.equals("project_name")){ name = item.getString(); }else if(currentField.equals("project_category")){ category = item.getString(); } else if(currentField.equals("project_description")){ description = item.getString(); }/*end inner if statement*/ }else{ /*The following code will get the file to be uploaded by getting a input stream * and then writing directly to the database column.*/ /*NOTES: close all streams! set auto-commit to false!*/ InputStream fileStream = item.getInputStream(); projectFileName = item.getName(); ResultSet rs = getLastRowResultSet(con); //get the large object manager LargeObjectManager lobj = ((org.postgresql.PGConnection)con).getLargeObjectAPI(); // Create a new large object long oid = lobj.createLO(LargeObjectManager.READ | LargeObjectManager.WRITE); fileObject = lobj.open(oid); byte buf[] = new byte[req.getContentLength()]; int s, tl = 0; while ((s = fileStream.read(buf, 0, req.getContentLength())) > 0) { fileObject.write(buf, 0, s); tl += s; }/*end inner while loop*/ fileObject.close(); // Now insert the row into imageslo PreparedStatement ps = con.prepareStatement("update projects set project_files = ? where index = ?;"); ps.setLong(1, oid); ps.setInt(2, rs.getRow()); ps.executeUpdate(); ps.close(); fileStream.close(); con.commit(); }/*end if statement*/ }/*end while loop*/ } /** * This method gets a connection to the database. * @return a connection to the PostgreSQL database * @throws SQLException * @throws ClassNotFoundException */ public Connection getPostgresConnection() throws SQLException, ClassNotFoundException{ Class.forName("org.postgresql.Driver"); String URL = "jdbc:postgresql:"+DBname; Connection con = DriverManager.getConnection(URL, DBusername, DBpassword); return con; } /** * This method does a simple query, moves a cursor to the last row so the recent row inserted can be selected. * @param con a connection object * @return a ResultSet object containing the last row * @throws SQLException */ public ResultSet getLastRowResultSet(Connection con) throws SQLException{ SQLSelect = "select * from projects;"; //select all move the cursor to last row, create a scrolling cursor Statement st = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); con.setAutoCommit(false);//set auto-commit to false, large object calls must be a transaction block ResultSet rs = st.executeQuery(SQLSelect); rs.refreshRow();//refresh the rows, otherwise row count will be incorrect rs.last();//move cursor to last row, because I need the last item inserted into the table return rs; } /** * This method inserts the values from the form along with a empty oid/blob to be used later. * @param con a connection object * @throws SQLException */ public void updateFieldValues(Connection con) throws SQLException{ int index = getLastRowResultSet(con).getRow(); Calendar calendar = Calendar.getInstance(); java.util.Date now = calendar.getTime(); java.sql.Timestamp currentTimestamp = new java.sql.Timestamp(now.getTime()); SQLInsert = "update projects set name = ?, category = ?, description = ?, project_file_name = ?, date = ? where index = ?;"; //insert field names, and create a empty blob(oid) PreparedStatement ps = con.prepareStatement(SQLInsert); ps.setString(1, name); ps.setString(2, category); ps.setString(3, description); ps.setString(4, projectFileName); ps.setTimestamp(5, currentTimestamp); ps.setInt(6, index); ps.executeUpdate();//update the row existing with the empty blob/oid with the newly obtained values con.commit();//commit because auto-commit is turned off temporarily. } /*Call methods here.*/ public void doPost (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{ HttpSession session = req.getSession(); synchronized(session){ try{ ep = (ErrorPrinter)session.getAttribute("errorPrinter"); Connection con = getPostgresConnection();//get a postgresql connection /*step ONE*/insertEmptyBlob(con);//insert a new row with a empty blob so we can manipulate its contents in processMultiPartForm method /*step TWO*/processMultiPartForm(req, con);//process the form and obtain field values as well as stream in the file bytes /*step THREE*/updateFieldValues(con);//update the field values & empty oid/blob, NOTE*- this updates the previous row, does not create a new one con.close(); res.sendRedirect(res.encodeRedirectURL("../index.jsp")); } catch (SQLException e) { ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch (ClassNotFoundException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(FileUploadException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(IndexOutOfBoundsException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(IOException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); } } }

Ok after some very emotionally trying times I have arrived at a good place in my current code. I figured out the fix for getting around the Connection.createBlob() function. I found the solution here, http://www.xinotes.org/notes/note/943/ I also had to fix some other things revolving around getting the field values along with the file. The problem I am having now is simple, I am not reading in the file bytes correctly and I could some suggestions. I may be doing something really bogus because I have not messed with bytes a whole lot. To test if the bytes are being read I export the test file (small image) to a place on my disk. Currenty the file I export is empty. Sorry for the lengthy code...
public void doPost (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{ HttpSession session = req.getSession(); synchronized(session){ try{ ep = (ErrorPrinter)session.getAttribute("errorPrinter"); FileItemFactory factory = new DiskFileItemFactory(); //file upload handler ServletFileUpload upload = new ServletFileUpload(factory); //boolean isMultiPart = ServletFileUpload.isMultipartContent(req); //parse the request //FileItemIterator iter = upload.getItemIterator(req); List<FileItem> items = upload.parseRequest(req); Iterator<FileItem> fieldIterator = items.iterator(); /*iterate through the form fields*/ while(fieldIterator.hasNext()){ //FileItemStream item = iter.next();//use this for logic control? FileItem field = (FileItem)fieldIterator.next();//use this to get field values InputStream stream = field.getInputStream(); /*check to see if this is the file field*/ if(!field.isFormField()){ projectFileName = field.getName();///get the file name stream = new DataInputStream(stream); int fileLength = req.getContentLength(); buffer = new byte[fileLength]; int n = 0; while(n >= 0){ n = stream.read(buffer);//how do I save the file bytes correctly? }/*end inner while*/ stream.close();//close the stream }else{ String currentField = field.getFieldName();//get the current field name /*Assign the values based on their name*/ if(currentField.equals("project_name")){ name = field.getString(); }else if(currentField.equals("project_category")){ category = field.getString(); } else if(currentField.equals("project_description")){ description = field.getString(); }/*end inner if*/ }/*end if*/ }/*end while loop*/ // create a java calendar instance Calendar calendar = Calendar.getInstance(); // get a java.util.Date from the calendar instance. // this date will represent the current instant, or "now". java.util.Date now = calendar.getTime(); // a java current time (now) instance java.sql.Timestamp currentTimestamp = new java.sql.Timestamp(now.getTime()); Class.forName("org.postgresql.Driver"); String URL = "jdbc:postgresql:"+DBname; Connection con = DriverManager.getConnection(URL, DBusername, DBpassword); SQLInsert = "insert into projects(name, category, description, project_files, project_file_name, date) values(?,?,?,lo_creat(-1),?,?);"; //insert field names, and create a dummy blob(oid) PreparedStatement ps = con.prepareStatement(SQLInsert); ps.setString(1, name); ps.setString(2, category); ps.setString(3, description); ps.setString(4, projectFileName); ps.setTimestamp(5, currentTimestamp); ps.executeUpdate();//insert the new item along with the dummy blob(oid) //Select all rows, move to the last SQLSelect = "select * from projects;"; //select all move the cursor to last row, create a scrolling cursor Statement st = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); ResultSet rs = st.executeQuery(SQLSelect); rs.refreshRow();//refresh the rows rs.last();//move cursor to last row SQLSelect = "select project_files from projects where index = ?";//select the last row made ps = con.prepareStatement(SQLSelect); con.setAutoCommit(false);//set auto-commit to false so i can get blob(oid) ps.setInt(1, rs.getRow());//set the parameter to the correct row value rs = ps.executeQuery(); if(rs.next()){ fileBlob = rs.getBlob("project_files");//get the dummy blob fileBlob.truncate(1); fileBlob.setBytes(1, buffer); }/*end if*/ con.close(); res.sendRedirect(res.encodeRedirectURL("../index.jsp")); } catch (SQLException e) { ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch (ClassNotFoundException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(FileUploadException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(IndexOutOfBoundsException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(IOException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); } } }

I have done some head scratching and have ran into some issues. I can't use the method Connection.createBlob() because the Postgresql jdbc4 drivers do not support this, that is literally the error I am receiving. Here is my code currently...I am up for any other suggestions on how I can upload a file into my database. What other methods are out there? Thanks for any assistance you can provide.
public void doPost (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{ HttpSession session = req.getSession(); synchronized(session){ try{ ep = (ErrorPrinter)session.getAttribute("errorPrinter"); req.getInputStream(); ///file upload handler ServletFileUpload upload = new ServletFileUpload(); //boolean isMultiPart = ServletFileUpload.isMultipartContent(req); //parse the request FileItemIterator iter = upload.getItemIterator(req); /*iterate through the form fields*/ while(iter.hasNext()){ FileItemStream item = iter.next(); String name = item.getName(); //InputStream stream = item.openStream(); /*check to see if this is the file field*/ if(!item.isFormField()){ //String fileName = item.getName(); DataInputStream in = new DataInputStream(req.getInputStream()); int length = req.getContentLength(); bytes = new byte[length]; int readBytes = 0; int totalReadBytes = 0; while(totalReadBytes < length && readBytes > 0){ readBytes = in.read(bytes, totalReadBytes, length); totalReadBytes += readBytes; }/*end inner while*/ // blob.setBytes(1, bytes); }else{ //get the field values from the other input boxes }/*end if*/ }/*end while loop*/ // create a java calendar instance Calendar calendar = Calendar.getInstance(); // get a java.util.Date from the calendar instance. // this date will represent the current instant, or "now". java.util.Date now = calendar.getTime(); // a java current time (now) instance java.sql.Timestamp currentTimestamp = new java.sql.Timestamp(now.getTime()); Class.forName("org.postgresql.Driver"); String URL = "jdbc:postgresql:"+DBname; Connection con = DriverManager.getConnection(URL, DBusername, DBpassword); SQLInsert = "insert into projects(name, category, project_files, description, date) values(?,?,?,?,?);"; //fileBlob = con.createBlob();//not yet implemented in postgresql jdbc4 drivers? PreparedStatement ps = con.prepareStatement(SQLInsert); ps.setString(1, name); ps.setString(2, category); ps.setBlob(3, fileBlob); ps.setString(4, description); ps.setTimestamp(5, currentTimestamp); ps.execute(); con.close(); res.sendRedirect(res.encodeRedirectURL("../index.jsp")); } catch (SQLException e) { ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch (ClassNotFoundException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); }catch(FileUploadException e){ ep.setCurrentError(e); res.sendRedirect(res.encodeRedirectURL("../index.jsp?error=true")); } } }

Thank you for the suggestions, I think I am on the right track. I will debug and get a sense of whats happening. I will post my solution once i get it.

Hi JavaRanch,
My question is how would I upload a file, say a text file and insert it into my database. Firstly, I am aware that I need to use the Commons FileUpload from Apache. The only thing I could not find a example of was to use the Commons FileUpload in conjunction with a database. The code shown here... is what i have so far, I just don't understand where I should go on from here. I know that I need to convert the file into a Blob data type but how do I do that? Any help is greatly appreciated!
/** * This function returns the file ready to be inserted into the database. * @param req * @return */ public Blob uploadFile(HttpServletRequest req){//should it return a Blob data type? help! byte bytes[] = null; try{ ///file upload handler //do I need a FileItemFactory???? help! ServletFileUpload upload = new ServletFileUpload(); boolean isMultiPart = ServletFileUpload.isMultipartContent(req); //parse the request FileItemIterator iter = upload.getItemIterator(req); String value = null; while(iter.hasNext()){ FileItemStream item = iter.next(); String name = item.getFieldName(); InputStream stream = item.openStream(); /*check to see if this is the file field*/ if(!item.isFormField()){ //String fileName = item.getName(); DataInputStream in = new DataInputStream(req.getInputStream()); int length = req.getContentLength(); bytes = new byte[length]; int readBytes = 0; int totalReadBytes = 0; while(totalReadBytes < length){ readBytes = in.read(bytes, totalReadBytes, length); totalReadBytes += readBytes; } String thefile = new String(bytes); String line = null; StringBuilder content = new StringBuilder(); BufferedReader input = new BufferedReader(new FileReader(thefile)); while (( line = input.readLine()) != null){ content.append(line); } value = content.toString(); } } }catch(Exception e){ } return bytes;//I know this is screwy, ignore this... } public void doPost (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{ try{ req.getInputStream(); //upload. name = req.getParameter("name"); category = req.getParameter("category"); description = req.getParameter("description"); // create a java calendar instance Calendar calendar = Calendar.getInstance(); //org.postgresql.largeobject. // get a java.util.Date from the calendar instance. // this date will represent the current instant, or "now". java.util.Date now = calendar.getTime(); // a java current time (now) instance java.sql.Timestamp currentTimestamp = new java.sql.Timestamp(now.getTime()); //java.sql.Blob file = new java.sql.Blob; Class.forName("org.postgresql.Driver"); String URL = "jdbc:postgresql:"+DBname; Connection con = DriverManager.getConnection(URL, DBusername, DBpassword); SQLInsert = "insert into projects(name, category, project_files, description, date) values(?,?, ?,?, ?);"; PreparedStatement ps = con.prepareStatement(SQLInsert); ps.setString(1, name); ps.setString(2, category); //ps.setBlob(3, uploadFile(req)); //How??? ps.setString(4, description); ps.setTimestamp(5, currentTimestamp); ps.execute(); res.sendRedirect(res.encodeRedirectURL("../index.jsp")); } catch (SQLException e) { //set the error }catch (ClassNotFoundException e){ } }

Thanks for the responses, always seem to be learning something new all the time.

Hi everyone,
I hate to start a new thread but I have not been able to find a solution to my problem. I am currently messing around with aws ec2 servers with suselinux environment. I am trying to deploy a web app but I am unable to because of my web-app cannot see the servlet-api.jar library. How do I set the class path permanently or temporarily so that I the web-app knows how to use servlets?
I have done a bit of digging around and one solution was to use the java -classpath command, which I never got to work, I also know that you can type set CLASSPATH=/usr/share/java/servlet-api.jar I am not sure how to get this to work either because everytime I tried to compile my java files they would still not compile even after trying this. I am feeling really lost on how to go about doing this. Any input would greatly help me, thanks!
-Tom R

nevermind just needed a more in depth guide http://www.yolinux.com/TUTORIALS/LinuxTutorialTomcat.html

Thanks a lot Martin, that worked, I was not familiar enough with how the PreparedStatement operated so that is why I had trouble with it. Thanks again!

By the way, what does the "||" operator do, i noticed that if I removed them that the sql failed, is that for the preparedstatement to parse?

Hello all,
I am currently trying to get these images out of this really simple database I created. The problem is I cannot get all of the images exported because some of the rows have name's such as, Bandit's Knife, notice the apostrophe. Everytime I try to export a image with a name that includes a apostrophe I will get a error, "Invalid sql syntax at or near s". Its a fairly small database with a couple hundred images or so. I thought that if I tried using a PreparedStatement instead that would help but I ran into another error, "The column index is out of range: 1, number of columns: 0". I also tried using the escape character that is mentioned here on the postgresql 9.1 docs I though that if I inserted the letter "E" in the correct place it would escape that single quote in the string but that did nothing. I really open to suggestions, here is what I have code wise.package main; import java.sql.*; import java.io.*; import java.util.*; public class ImageGenerator { ArrayList<String> weapNames = new ArrayList<String>(); ArrayList<String> armorNames = new ArrayList<String>(); private final String regex ="'"; public ImageGenerator(){ } public void generateAllDataBaseImages(){ try{ String URL = "jdbc:postgresql:darksouls"; Class.forName("org.postgresql.Driver"); Connection con = DriverManager.getConnection(URL, "tomr", "password"); Statement st = con.createStatement(); ResultSet rs = null; String SQLSelect = "SELECT name "+ "FROM weapons;"; rs = st.executeQuery(SQLSelect); //fill up the weapon names array list while(rs.next()){ weapNames.add(rs.getString("name")); } SQLSelect = "SELECT armor_name "+ "FROM armor;"; rs = st.executeQuery(SQLSelect); //fill up the armor array list while(rs.next()){ armorNames.add(rs.getString("armor_name")); } //loop through and export images with that names just obtained for(int i = 0; i < weapNames.size(); i++){ String SQL= "BEGIN TRANSACTION; "+ "SELECT lo_export(weapons.image, 'C:/Users/Public/Pictures/pics/?.png') " + "FROM weapons "+ "WHERE name = '?'; "+ "COMMIT; "; //create the prepared statement PreparedStatement ps = con.prepareStatement(SQL); ps.setString(1, weapNames.get(i)); ps.setString(2, weapNames.get(i)); //execute the sql ps.execute(); } System.out.println("all done!"); st.close(); con.close(); } catch(SQLException e){ System.out.println("sql failed!"); e.printStackTrace(); } catch(ClassNotFoundException e){ e.printStackTrace(); } } }

Nevermind, my code is working fine except my ball logic is flawed, I viewed this applet on my desktop computer and it runs fine except the images need to be double buffered. Thanks anyways!

-Tom Reese

Howdy JavaRanch!
I have a small problem with a applet I have been tinkering around with. I am trying to get a ball to bounce around within the boundaries of the applet window, it works, well sort of...
My problem is this, when I call to repaint(); the images flicker too quickly or something and I cant see the images but they are moving. I can tell this because the ball flickers in and out of existence too quickly. When I dont call to repaint(); the ball/image sits there and does nothing, unless you resize the applet window, then it starts moving. I have two class files, one that paints and updates the applet, the other which is the Ball class controls all of the Ball like logic. Please let me know if you see a glaring problem, that would be nice. Thanks for looking at this stuff. I did do a search on these forums and tried to relate others code to mine but I dont see anything wrong with mine.
Thanks,
-Tom Reese
Here it goes..dum dum dum
package applet; import java.applet.Applet; import java.awt.*; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.ArrayList; import javax.imageio.ImageIO; @SuppressWarnings("serial") /** * This class updates the ball class and uses a thread to update the game. * @author Tom Reese AKA "tomjar" * */ public class AppletMain extends Applet implements Runnable{ private ArrayList<Ball> listBall = new ArrayList<Ball>(); private static final int UPDATE_RATE= 30; private Thread run = null; int counter = 0; /** * This initializes the thread and creates a new ball. * I also set the default size of the applet window. */ public void init(){ if(run == null){ //create a new thread of this/applet run=new Thread(this); run.start(); } //setSize() of screen this.setSize(500, 500); this.setVisible(true); //create a image of the current applet window try{ BufferedImage img = ImageIO.read(new File("../Images/ball.png")); listBall.add(new Ball(0, 0, img)); } catch (IOException e){ //g.drawString("Image not found.", 50, 50); } } public void paint (Graphics g){ //this forces the app to run at 30 frames a second : ) try{ //sleep the thread a bit otherwise it runs away Thread.sleep(1000 / UPDATE_RATE); }catch (Exception e){ //print stack trace or something } // Clear off everything that has been drawn before // Otherwise previous drawings would also be displayed. //g.clearRect(0, 0, this.getWidth(), this.getHeight()); counter++; //g.drawImage(offscreen, 0, 0, this); g.drawString("The frame number is:"+ counter, 50, 150); //g.drawString("The document base is:" + this.getDocumentBase(), 50, 200); //draw the ball for(Ball ball : listBall){ ball.paint(g, this); } //run the thread method containing the ball logic this.run(); this.repaint(); } @Override public void run() { // TODO Auto-generated method stub //update the ball for(Ball ball : listBall){ ball.update(this); } } }
package applet; import java.awt.*; import java.awt.image.BufferedImage; /** * This class represents a ball that bounces around. * @author Tom Reese AKA "tomjar" * */ public class Ball { private int ballPositionX = 0; private int ballPositionY = 0; private BufferedImage ballImage = null; private int appWidth = 0; private int appHeight = 0; //give the balls initial velocity private int velocityX = 0; private int velocityY = 0; /** * This is the parameterized constructor for the Ball class. * @param ballPositionX the current ball horizontal position. * @param ballPositionY the current ball vertical position. * @param imageSource the current image source of the ball. */ public Ball (int ballPositionX, int ballPositionY, BufferedImage ballImage){ this.ballPositionX = ballPositionX; this.ballPositionY = ballPositionY; this.ballImage = ballImage; } /** * This method executes any code that the ball needs to do * during applet runtime. */ public void update(AppletMain appMain){ //None of this code appears to be executing :( //as the applet runs get the current height and width this.setAppWidth(appMain.getWidth()); this.setAppHeight(appMain.getHeight()); //set the ball position this.setBallPositionX(velocityX); this.setBallPositionY(velocityY); //bounce the ball around the bounds of the applet if(this.getBallPositionX() <= this.getAppWidth()){ //increment direction x velocityX++; this.setBallPositionX(velocityX); }else if(this.getBallPositionX() >= this.getAppWidth()){ //decrement direction x velocityX--; this.setBallPositionX(velocityX); } if(this.getBallPositionY() <= this.getAppHeight()){ //increment direction y velocityY++; this.setBallPositionY(velocityY); }else if(this.getBallPositionY() >= this.getAppHeight()){ //decrement direction y velocityY--; this.setBallPositionY(velocityY); } } /** * This method executes any drawing/painting code the ball needs to do * during applet runtime. * @param g the reference to Graphics so this method can draw to the applet. * @param appMain a reference to the class appMain */ public void paint(Graphics g, AppletMain appMain){ //g.clearRect(0, 0, getAppWidth(), getAppHeight()); g.drawImage(ballImage, this.getBallPositionX(), this.getBallPositionY(), appMain); } //boring accessors, nothing to see here! : ) public int getBallPositionX(){ return this.ballPositionX; } public int getBallPositionY(){ return this.ballPositionY; } public Image getImageSource(){ return this.ballImage; } public int getAppWidth(){ return this.appWidth; } public int getAppHeight(){ return this.appHeight; } //boring mutators, nothing to see here! : ) public void setBallPositionX(int ballPositionX){ this.ballPositionX = ballPositionX; } public void setBallPositionY(int ballPositionY){ this.ballPositionY = ballPositionY; } public void setBallImage(BufferedImage ballImage){ this.ballImage = ballImage; } public void setAppWidth(int appWidth){ this.appWidth = appWidth; } public void setAppHeight(int appHeight){ this.appHeight = appHeight; } }