Can anyone spot the syntax error of db delete?
Hi
I'm trying to get a database delete statement to work for a relations table - it just has studentId and courseId as foreign keys which make up a joint primary key.
The line is
db.update("delete from enrollments2 where (studentsid = '" + getStudentId() + "," + " coursesid = " + getCourseId() + "')");The error is
ERROR: invalid input syntax for integer: "78, coursesid = 75"Somehow I am putting non integer into an integer... I can't seem to spot the mistake though. Any help would be appreciated.
The correct syntax I should mention was
db.update("delete from enrollments2 where (studentsid = '" + getStudentId() + "'and coursesid = '" + getCourseId() + "')");I'll leave that in for the time being and try to come back to it tonight... its on my todo list.
Thanks for the snippet by the way, it always saves a lot of time when someone provides a useful snippet towards a solution. I hadn't heard of prepared statements until now too, interesting.
Message was edited by:
occams_razor
-->> missed a 2 out there as enrollments2 is my test case
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Can anyone spot the syntax error?
I've been looking at this for about a day now and can't see the error, which is:
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public String addSaleList(SaleList sL) {
try {
//Gets the connection to customer database.
Class.forName(Driver);
Connection myCon = DriverManager.getConnection(Url);
System.out.println(sL.saleListID + " " + sL.saleID + " " + sL.product
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at sun.jdbc.odbc.JdbcOdbc.SQLExecute(JdbcOdbc.java:3150)
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at myproject.SaleModel.addSaleList0 120 a 1
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at myproject.SalesGUI.actionPerformed(SalesGUI.java:395)
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at java.awt.Component.dispatchEvent(Component.java:3477)
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Can ANYONE spot the memory leak??
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char* getDescription(char* chFlag, char* chDEID, char* chKey, int keysize)
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I had also tried to use the ReleaseStringUTFChars after making the check of whether it does a copy or not.
For me in Windows, it works fine most of the time. But when I go on increasing the no. of strings in a Vector of objects to more than 500 or something , then it occasionally fails.
Just before ReleaseStringUTF, I do have the copied string in char* .
Soon after Releasing, I do get a junk in the character array.
I dont know why it happens like this.
Please advice.
Everyone suggest ReleaseStringUTF.
But why it fails in Windows.
And any one know about how it will behave in Alpha.
It totally fails in Alpha.
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Please help
LathaDhamo -
Can anyone spot the problem with this coding??
can anyone spot this problem with my program. it keeps saying
"missing return statement } " with a little arrow beneath the bracket.
many thanks
public class Game extends GameInterface
GameInterface gameInt = new GameInterface();
String boardString;
// final static char NOUGHT='O', CROSS='X';
private int square = 0;
Player player1 = new Player();
Player player2 = new Player();
String firstPlayer, secondPlayer;
public Game() // Constructor
boardString = "0123456789";
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String P1 = player1.getName();
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Hey i've been workin on an applet which accepts two boolean equations with 3 variables and returns an answer telling if they are logically equal. When it comes to the PLUS and MINUS cases the program works fine. However in the TIMES and DIVIDE cases it returns at least one wrong answer, despite the fact i'm using the logical AND gate. For example if i enter x*y the program returns
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answer 2 = 1, when (x,y)=(1,0)
answer 3 = O, when (x,y)=(0,1)
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were answer 2 is wrong using an AND gate.
Here is the for loop which passes the values
for (int y = 0; y < 2; y++)
for (int x = 0; x < 2; x++)
int d = MyParser.answer(x, y);
int doub = MyParser2.answer(x, y);
String eq = "";
if (d == doub) {
equal++;
count++;
eq = "equal\t";
else {
count++;
eq = "not equal";
tb1.append("\nAnswer was " + d + "\t " + eq + " " +
"\t answer 2 was " + doub);
}and here is the code for the parser
package Applet1;
public final class Parse
public Parse (String equation)
parse (equation);
public int answer(int x,int y, int z)
return this.value(x,y,z);
public int answer(int x,int y)
return this.value(x, y);
public int answer(int x)
return this.value(x);
public int value(int x)
return val(x, 0, 0);
public int value(int x, int y)
return val(x, y, 0);
public int value(int x, int y, int z)
return val(x, y, z);
public String getEquation()
return equation;
private String equation;
private byte[] code;
private int[] stack;
private int[] constant;
private int pos = 0, constantCt = 0, codeSize = 0;
private static final byte
PLUS = -1, MINUS = -2, TIMES = -3, DIVIDE = -4,
UNARYMINUS = -5, VARIABLEX = -6, VARIABLEY = -7, VARIABLEZ = -8;
private char next()
if (pos >= equation.length())
return 0;
else
return equation.charAt(pos);
private void skip()
while (Character.isWhitespace(next()))
pos++;
private int val(int variableX, int variableY, int variableZ)
try
int top = 0;
for (int i=0; i < codeSize; i++)
if (code[i] >= 0)
stack [top++] = constant [code ];
else if (code [i] >= UNARYMINUS)
int y = stack[--top];
int x = stack[--top];
int w;
int ans = (int) Double.NaN;
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case PLUS: ans = x | y;
break;
case MINUS: ans = (x) & (~y);
break;
case TIMES: ans = x & y;
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case DIVIDE: ans = x & ~y;
break;
if (Double.isNaN(ans))
return ans;
stack [top++] = ans;
else if (code[i] == VARIABLEX)
stack [top++] = variableX;
else if (code[i] == VARIABLEY)
stack [top++] = variableY;
else if (code[i] == VARIABLEZ)
stack [top++] = variableZ;
catch (Exception e)
double b = Double.NaN;
int i = (int) b;
return i;
double d2;
if (Double.isInfinite(stack[0]))
d2 = Double.NaN;
int i2 = (int) d2;
return i2;
}else
return stack[0];
private void error (String message)
throw new IllegalArgumentException
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private int stackUse()
int s = 0;
int max = 0;
for (int i = 0; i < codeSize; i++)
if (code[i] >= 0 || code [i] == VARIABLEX || code[i] == VARIABLEY || code[i] == VARIABLEZ)
s++;
if (s > max)
max = s;
} else if (code[i] >= UNARYMINUS)
s--;
return max;
private void parse (String equation)
if (equation == null || equation.trim().equals(""))
error ("No Data to be parsed");
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code = new byte[equation.length()];
constant = new int [equation.length()];
parseExpress();
skip();
int stackSize = stackUse();
stack = new int[stackSize];
byte[] c = new byte[codeSize];
System.arraycopy(code,0,c,0,codeSize);
code = c;
int[] A = new int[constantCt];
System.arraycopy(constant,0,A,0,constantCt);
constant = A;
private void parseExpress()
boolean neg = false;
skip();
parseVaries();
if (neg)
code[codeSize++] = UNARYMINUS;
skip();
while (next() == '+' || next() == '-')
char op = next();
pos++;
parseTerm();
if (op =='+')
code[codeSize++] = PLUS;
else
code[codeSize++] = MINUS;
skip();
private void parseTerm()
parseFactor();
skip();
while (next() == '*' || next() == '/')
char op = next();
pos++;
parseFactor();
code[codeSize++] = (op == '*')? PLUS:MINUS;
skip();
private void parseFactor()
parseVaries();
skip();
while (next() == '^')
pos++;
parseVaries();
code[codeSize++] = UNARYMINUS;
skip();
private void parseVaries()
skip();
char ch = next();
if (ch == 'x' || ch =='X')
pos++;
code[codeSize++] = VARIABLEX;
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pos++;
code[codeSize++] = VARIABLEY;
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pos++;
code[codeSize++] = VARIABLEZ;
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pos++;
parseExpress();
skip();
if (next () !=')')
error("Right parenthesis needed");
pos++;
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error ("Need a left parenthesis");
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error ("Incorrect entry");
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error ("Illegal character " + ch);
Its not pretty i know and its missing a part to parse Digits and i'm using type casting for strange reasons, but it does work. Except for in these two cases, can anyone see why
Thanks
podgerI'm not even entirely certain what you are trying to accomplish here.
It looks wrong in any case.
I can't see anything in the way of debugging, so heres my help for today:
public void printCode(){
System.out.println(equation + ":");
for(int i=0; i<code.length; i++){
switch(code){
case PLUS: System.out.print("Plus "); break;
case MINUS: System.out.print("Minus "); break;
case TIMES: System.out.print("TIMES "); break;
case DIVIDE: System.out.print("DIVIDE "); break;
case UNARYMINUS: System.out.print("-"); break;
case VARIABLEX: System.out.print("x "); break;
case VARIABLEY: System.out.print("y ");break;
case VARIABLEZ:System.out.print("z ");break;
System.out.println();
I suggest you parse a couple of expressions, and print out the code generated using this handy little method.
Parse parse = new Parse("x+y");
parse.printCode();
parse = new Parse("x*y");
parse.printCode();(x+y) : x y Plus
(x*y) : x
I think you will find the problem in your parseExpress method (well one of your problems anyway)
Also take a look at your ParseTerm function - I'm pretty sure that a * is meant to represent "TIMES" and not "PLUS"
Did you ever thing about using switch statements rather than ifs?
Good luck,
evnafets -
FileExtract - Can anyone spot the deliberate mistake please?
Basically, the program includes my add-in along with SAPbouiCOM.dll both embedded.
The code below now extracts SAPbouiCOM.dll perfectly, but my program is condensed to 1Kb!!!
I bet there's something obvious here, but I just can't spot it!
Private Sub ExtractFile(ByVal path As String)
Try
Dim AddonExeFile As IO.FileStream
Dim thisExe As System.Reflection.Assembly
thisExe = System.Reflection.Assembly.GetExecutingAssembly()
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Dim sSourcePath As String
Dim sTargetPathdll As String
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sTargetPath = path & "\" & sAddonName & ".exe"
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sTargetPathdll = path & "\" & "Interop.SAPbouiCOM.dll"
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sFile = thisExe.GetManifestResourceStream(resourceName)
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' Create a tmp file first, after file is extracted change to exe
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End If
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Else
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AddonExeFile = IO.File.Create(sTargetPathdll)
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AddonExeFile.Close()
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Next
Catch ex As Exception
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End SubHi Daniel,
I'm a bit lazy - so I'm not going to go through your code -> I'll give you a code snippet I use (it is basically the same as in the SAP example)
"in someSub"
' Extract exe to installation folder
ExtractFile(strDest, "YourAddonName", "exe")
' Extract dlls to installation folder
ExtractFile(strDest, "Interop.SAPbobsCOM", "dll")
"end someSub"
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Dim file As System.IO.Stream
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Dim sSourcePath = path & "\" & FName & ".tmp"
Try
Try
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AND remenber to include your exe and dll as embedded resources in your Add-On installer -
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XMLELEMENT ("Email", email),
XMLELEMENT ("Phone", phone_number)
) AS result
FROM employees
WHERE employees.department_id = departments.department_id
AS result
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SELECT
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XMLAGG (
XMLELEMENT("EMPLOYEE",
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FROM employees
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AS result
FROM departments -
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This AppleScript is designed to copy the Name and Artist of an iTunes track, then populate the Album Artist field with both, separated with an oblique. But when I run the script in iTunes, it only pastes the Artist name in to the Album Artist field and not the whole string.
tell application "iTunes"
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if gave up of result is true then return
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end tell
end repeat
else
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end if -- no selection
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Try -
tell item t of sel
set album artist to (get artist) & " / " & (get name)
end tell
instead of -
tell contents of item t of sel
set {album artist} to ({get artist} & " / " & {get name})
end tell
In your original code, the left and right value of assignment are both list, i.e. -
left value = {album artist}
right value = {get artist, "/", get name}
Consequently 'album artist' is assigned to the 1st item of the list at right, which is the result of 'get artist'.
In order to avoid this, don't use list assingment, which is not necessary at all here.
Also, I think you may just tell item t of sel, not contents of item t of sel.
Hope this may help,
H -
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http://www.apple.com/support/mac/app-store/contact.html?form=account
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Anyone spot the problem with this program???
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"missing return statement
^
1 error"
can anyone spot it on my program???
//GAME
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myPrintln(FP, SYSTEM);
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gameInt.pictureBoard(s);
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int loop = 0;
while(loop<=6)
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myPrintln(player1.getName() + " (X) to play");
char name1 = c.input.readChar();
name1 = c.input.readChar();
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gameInt.play(name1, true);
gameInt.pictureBoard(gameInt.display());
myPrintln("");
player2.setName(SP);
myPrintln(player2.getName() + " (O) to play");
char name2 = c.input.readChar();
name2 = c.input.readChar();
playTurn = false;
gameInt.play(name2, false);
gameInt.pictureBoard(gameInt.display());
myPrintln("");
loop++;
cheers
DaveChange public int makeMove() into: public void makeMove()
and the compiler will keep quiet (or finds more things to complain about) -
Requirement to check the syntax error of Customize SAP Objects in existing landscape.
Hi All,
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Hello
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It did the trick. In fact, I've now noticed that new always seems to be followed by a space:
new JScrollPane
new JPanel
new JButton
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Hi, Can anyone encounter the problem that you couldn't update your apps from Mac book pro??
Hi, Can anyone encounter the problem that you couldn't update your apps from Mac book pro??
Currently, my mac can't update any of the software from App store as well as bulit in software like garageband.yeah...
i did that but it didn't work.
Every times, i click on the software updates, software updates dialog box is popping up and
checking for new updates.
After that, acknowledged me whether i want to update or not.
once, i click on "install".
it appears following message.
"A network error has occurred. Check your Internet connection, and then try again."
i totally can access to Internet as i can browser all the websites.
Please help me, is it a "virus" or "malware" causing my mac?.
i just changed a new mac recently and having this problem -
Problems with Overlay Layout - can anyone spot something wrong/missing?
Hi folks, I'm developing a tool that allows you to draw rectangles around objects on an image. The rectangles are then saved, and you can move between images. For some reason, though my rectangles are not drawing on the panel. I am using the Overlay Layout. Can anyone spot what I'm doing wrong? (The TopPanel canvas appears to be there, as it's taking input from the mouse - the problem is simply that the red rectangles are not drawing on the panel). Please help!!
So you know, there is a JFrame in another class which adds an instance of the ObjectMarker panel to it. It also provides buttons for using the next and previous Image methods.
Any other general advice is appreciated too.
* Object_Marker.java
* Created on 07 April 2008, 15:38
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import javax.imageio.ImageIO;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.OverlayLayout;
import javax.swing.event.MouseInputAdapter;
* @author Eric
public class ObjectMarker extends javax.swing.JPanel {
private static final long serialVersionUID = 6574271353772129556L;
File directory;
String directory_path;
Font big = new Font("SansSerif", Font.BOLD, 18);
List<File> file_list = Collections.synchronizedList(new LinkedList<File>());
String[] filetypes = { "jpeg", "jpg", "gif", "bmp", "tif", "tiff", "png" };
// This Hashmap contains List of Rectangles, allowing me to link images to collections of rectangles through the value 'index'.
public static HashMap<Integer, List<Rectangle>> collection = new HashMap<Integer, List<Rectangle>>();
BufferedImage currentImage;
Thread thread;
Integer index = 0;
OverlayLayout overlay;
private TopPanel top;
private JPanel pictureFrame;
String newline = System.getProperty("line.separator");
* Creates new form Object_Marker
* @throws IOException
public ObjectMarker(File directory) {
System.out.println("Got in...");
this.directory = directory;
File[] temp = directory.listFiles();
directory_path = directory.getPath();
// Add all the image files in the directory to the linked list for easy
// iteration.
for (File file : temp) {
if (isImage(file)) {
file_list.add(file);
initComponents();
try {
currentImage = ImageIO.read(file_list.get(index));
} catch (IOException e) {
System.out.println("There was a problem loading the image.");
// 55 pixels offsets the height of the JMenuBar and the title bar
// which are included in the size of the JFrame.
this.setSize(currentImage.getWidth(), currentImage.getHeight() + 55);
public String getImageList() {
// Allows me to build the string gradually.
StringBuffer list = new StringBuffer();
list.append("Image files found in directory: \n\n");
for (int i = 0; i < file_list.size(); i++) {
list.append((((File) file_list.get(i))).getName() + "\n");
return list.toString();
private void initComponents() {
top = new TopPanel();
pictureFrame = new javax.swing.JPanel();
OverlayLayout ol = new OverlayLayout(this);
this.setLayout(ol);
this.add(top);
this.add(pictureFrame);
* private void initComponents() {
* javax.swing.GroupLayout pictureFrameLayout = new
* javax.swing.GroupLayout(pictureFrame);
* pictureFrame.setLayout(pictureFrameLayout);
* pictureFrameLayout.setHorizontalGroup(
* pictureFrameLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
* .addGap(0, 497, Short.MAX_VALUE) ); pictureFrameLayout.setVerticalGroup(
* pictureFrameLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
* .addGap(0, 394, Short.MAX_VALUE) );
* javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
* this.setLayout(layout); layout.setHorizontalGroup(
* layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
* .addComponent(pictureFrame, javax.swing.GroupLayout.DEFAULT_SIZE,
* javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) );
* layout.setVerticalGroup(
* layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
* .addComponent(pictureFrame, javax.swing.GroupLayout.DEFAULT_SIZE,
* javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); }
* This function returns the extension of a given file, for example "jpg" or
* "gif"
* @param f
* The file to examine
* @return String containing extension
public static String getExtension(File f) {
String ext = null;
String s = f.getName();
int i = s.lastIndexOf('.');
if (i > 0 && i < s.length() - 1) {
ext = s.substring(i + 1).toLowerCase();
} else {
ext = "";
return ext;
public String getDetails() {
saveRectangles();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < file_list.size(); i++) {
try{
int count = collection.get(i).size();
if (count > 0) {
sb.append(file_list.get(i).getPath() + " "); // Add the
// filename of
// the file
sb.append(count + " "); // Add the number of rectangles
for (int j = 0; j < collection.get(i).size(); j++) {
Rectangle current = collection.get(i).get(j);
String coordinates = (int) current.getMinX() + " "
+ (int) current.getMinY() + " ";
String size = ((int) current.getMaxX() - (int) current
.getMinX())
+ " "
+ ((int) current.getMaxY() - (int) current
.getMinY()) + " ";
String result = coordinates + size;
sb.append(result);
sb.append(newline);
} catch (NullPointerException e){
// Do nothing. "int count = collection.get(i).size();"
// will try to over count.
return sb.toString();
private boolean isImage(File f) {
List<String> list = Arrays.asList(filetypes);
String extension = getExtension(f);
if (list.contains(extension)) {
return true;
return false;
/** Draw the image on the panel. * */
public void paint(Graphics g) {
if (currentImage == null) {
g.drawString("No image to display!", 300, 240);
} else {
// Draw the image
g.drawImage(currentImage, 0, 0, this);
// Write the index
g.setFont(big);
g.drawString(index + 1 + "/" + file_list.size(), 10, 25);
public void nextImage() throws IOException {
if (index < file_list.size() - 1) {
printOutContents();
System.out.println("Index: " + index);
saveRectangles();
index++;
currentImage = ImageIO.read(file_list.get(index));
this
.setSize(currentImage.getWidth(),
currentImage.getHeight() + 55);
top.setSize(this.getSize());
top.rectangle_list.clear();
if (collection.size() > index) {
loadRectangles();
repaint();
private void saveRectangles() {
// If the current image's rectangles have not been changed, don't do
// anything.
if (collection.containsKey(index)) {
System.out.println("Removing Index: " + index);
collection.remove(index);
collection.put(index, top.getRectangleList());
System.out.println("We just saved " + collection.get(index).size()
+ " rectangles");
System.out.println("They were saved in HashMap Location " + index);
System.out.println("Proof: ");
List<Rectangle> temp = collection.get(index);
for (int i = 0; i < temp.size(); i++) {
System.out.println("Rectangle " + (i + 1) + ": " + temp.get(i));
// If the rectangle list has changed, set the list the current index
// as the new list.
private void loadRectangles() {
System.out.println("We just loaded index " + index
+ " into temporary memory.");
System.out.println("Proof: ");
List<Rectangle> temp = collection.get(index);
top.rectangle_list = collection.get(index);
for (int i = 0; i < temp.size(); i++) {
System.out.println("Rectangle " + (i + 1) + ": " + temp.get(i));
private void printOutContents() {
System.out.println();
System.out.println("Contents printout...");
for (int i = 0; i < collection.size(); i++) {
for (Rectangle r : collection.get(i)) {
System.out.println("In collection index: " + i + " Rectangle "
+ r.toString());
System.out.println();
public void previousImage() throws IOException {
if (index >= 1) {
printOutContents();
System.out.println("Index: " + index);
saveRectangles();
index--;
currentImage = ImageIO.read(file_list.get(index));
this
.setSize(currentImage.getWidth(),
currentImage.getHeight() + 55);
top.setSize(this.getSize());
top.rectangle_list.clear();
if (index >= 0) {
loadRectangles();
repaint();
public void removeLastRectangle() {
// This method removes the most recent rectangle added.
try {
int length = collection.get(index).size();
collection.get(index).remove(length - 1);
} catch (NullPointerException e) {
try {
top.rectangle_list.remove(top.rectangle_list.size() - 1);
} catch (IndexOutOfBoundsException ioobe) {
JOptionPane.showMessageDialog(this, "Cannot undo any more!");
* Class developed from SSCCE found on Java forum:
* http://forum.java.sun.com/thread.jspa?threadID=647074&messageID=3817479
* @author 74philip
class TopPanel extends JPanel {
List<Rectangle> rectangle_list;
private static final long serialVersionUID = 6208367976334130998L;
Point loc;
int width, height, arcRadius;
Rectangle temp; // for mouse ops in TopRanger
public TopPanel() {
setOpaque(false);
rectangle_list = Collections
.synchronizedList(new LinkedList<Rectangle>());
TopRanger ranger = new TopRanger(this);
addMouseListener(ranger);
addMouseMotionListener(ranger);
public List<Rectangle> getRectangleList() {
List<Rectangle> temporary = Collections
.synchronizedList(new LinkedList<Rectangle>());
temporary.addAll(rectangle_list);
return temporary;
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(Color.red);
// Draw all the rectangles in the rectangle list.
for (int i = 0; i < rectangle_list.size(); i++) {
g2.drawRect(rectangle_list.get(i).x, rectangle_list.get(i).y,
rectangle_list.get(i).width, rectangle_list.get(i).height);
if (temp != null) {
g2.draw(temp);
public void loadRectangleList(List<Rectangle> list) {
rectangle_list.addAll(list);
public void addRectangle(Rectangle r) {
rectangle_list.add(r);
class TopRanger extends MouseInputAdapter {
TopPanel top;
Point offset;
boolean dragging;
public TopRanger(TopPanel top) {
this.top = top;
dragging = false;
public void mousePressed(MouseEvent e) {
Point p = e.getPoint();
top.temp = new Rectangle(p, new Dimension(0, 0));
offset = new Point();
dragging = true;
top.repaint();
public void mouseReleased(MouseEvent e) {
dragging = false;
// update top.r
System.out.println(top.getRectangleList().size() + ": Object added: "
+ top.temp.toString());
top.addRectangle(top.temp);
top.repaint();
public void mouseDragged(MouseEvent e) {
if (dragging) {
top.temp.setBounds(top.temp.x, top.temp.y, e.getX() - top.temp.x, e
.getY()
- top.temp.y);
top.repaint();
}Regards,
EricAlright so I fixed it! I created a new class called BottomPanel extends JPanel, which I then gave the responsibility of drawing the image. I gave it an update method which took the details of the currentImage and displayed it on the screen.
If anybody's interested I also discovered/solved a problem with my mouseListener - I couldn't drag backwards. I fixed this by adding tests looking for negative widths and heights. I compensated accordingly by reseting the rectangle origin to e.getX(), e.getY() and by setting the to original_origin.x - e.getX() and original_origin.y - e.getY().
No problem!
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