Cannot find symbol please help me
iam trying to make a break out game and right now iam trying to set up the bricks i have two images iam using this is my code
bricks = new ArrayList();
for(int r = 0; r < 4; r++) {
for (int c = 0; c < 8; c++){
Bricks newBrick;
if((r + c)% 2 == 0)
newBrick = new Bricks(10 + 75 * c, 100 + 25 * r, brickImage1);
else
newBrick = new Bricks(10 + 75 * c, 100 + 25 * r, brickImage2);
bricks.add(newBrick);
}
judging by the conceptual understanding you now have of OOP ie: in the way you create your new class instances, I'd say you're being over-ambitious if you think you're going to be able to write a game like this.
Learn the basics first
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Re: CANNOT FIND SYMBOL ERROR HELP!
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~Hello,
Thanks yawmark, I'll move the thread.
Please feel free to answer once the thread has been
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Please help. Cannot find symbol Error!
I have been working on this code for days now. It keeps coming up with errors. The error says cannot find symbol. I will bold the areas that say that. I got it down to 23 from 42 but now I have no idea what the problem is. any help is greatly appreciated!! I only added a couple of them mainly because it is overwhelming. I can add the rest of someone replies. Thank you again. Oh and the Classpath is set right. I am compiling from the desktop where I have the file also. That was the first thing I checked after reading other threads related to this issue. :O)
import javax.swing.*;
import java.awt.event.*;
public class InventoryPart4 extends JFrame
private JTextArea text;
private Inventory inv;
private int view;
public InventoryPart4() {
super("Product");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // quit if the window is closed
view = 0; // current one showing
Product product;
inv = new Inventory(4);
product = new Product(1, "Salad", 3, 4.95); here
inv.add(product, 0);
product = new Product(2, "Dressing", 6, 3.00); here
inv.add(product, 1);
product = new Product(3, "Bacon Bits", 2, 1.75);*here*
inv.add(product, 2);
product = new Product(4, "Croutons", 1, 1.75); here
inv.add(product, 3);
// sort
inv.sort();
// output
for (int i = 0; i < 4; i++) {
System.out.println(inv.get(i));
// total val
System.out.printf("Total=$%.2f", inv.totalValue());
//gui
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel,BoxLayout.Y_AXIS));
text = new JTextArea(10,50);
text.setEditable(false);
panel.add(text);
showProduct();
JButton next = new JButton("Next");
here next.addProduct(new Product() {
public void actionPerformed(ActionEvent e) {
if (view < inv.size()-1) view++;
else view = 0;
showProduct();
panel.add(next);
getContentPane().add(panel);
// view an item
public void showProduct() {
text.setText("Product Details:\n");
text.append(inv.get(view).toString()+"\n");
text.append(String.format
("Value of all the Contents: $%.2f", inv.totalValue()));
public static void main(String args [])
InventoryPart4 invt = new InventoryPart4();
invt.pack();
invt.setVisible(true);
} //end main
} // end class InventoryPart1
class Product {
private int ProductItem;
private int ProductStock;
private double ProductPrice;
public Product(int item, int stock, double price) {
ProductItem = item;
ProductStock = stock;
ProductPrice = price;
} //end three-argument constructor
// set Product Item
public void setProductItem(int item) {
ProductItem = item; here
} //end method set Product Item
//return Product Item
public int getsProductItem() {
return productItem;
} //end method get product Item
//set Product Stock
public void setProductStock(int stock) {
productStock = stock;
} //end method set Product Stock
//return Product Stock
public int getProductStock() {
return productStock;
} //end method get Product Stock
public void setProductPrice(double price) {
productPrice = price;
} //end method setproductPrice
//return Product Price
public double getProductPrice() {
return ProductPrice;
} //end method get Product Price
//calculate inventory value
public double value() {
return productPrice * productStock;
}// end method get productPrice and productStock
@Override
public String toString() {
return String.format("item=%3d units=%d price=%.2f value=%.2f",
productItem, productStock, productPrice, value());
}//end class Product
class Inventory {
private Product[] list;
// constructor
public Inventory(int size) {
list = new Product[size];
// complete value
public double totalValue() {
double val = 0.0;
for (int i = 0; i < list.length; i++) {
val += list.value();
return val;
// add an item
public void add(Product i, int p) {
list[p] = i;
// get an item
public Product get(int i) {
return list[i];
// sort by name
public void sort() {
// bubble sort
int n = list.length;
for (int search = 1; search < n; search++) {
for (int i = 0; i < n-search; i++) {
if (list[i].getProductItem().compareToIgnoreCase(list[i+1].getProductItem()) > 0) {
// swap
Product temp = list[i];
list[i] = list[i+1];
list[i+1] = temp;
public int size() {
return list.length;
//extended class
class Contents extends Product {
private String Contents;
// constructor
public Contents(int item, String name, int units, double price) {
super(item,name,units, price);
this.contents = contents;
// getter
public String getContents() {
return Contents;
// total value with the 5% fee
public double value() {
return super.value()*1.05;
// just the 5% fee
public double fee() {
return super.value()*0.05;
// setter
public void setContents(String contents) {
this.contents = contents;
public String toString()
return super.toString() + String.format(" fee=%.2f contents=%-20s",
fee(), contents);The error says cannot find symbol.It says more than that. It says what symbol it cannot find, and it points to the line of code where the symbol was used.
product = new Product(1, "Salad", 3, 4.95); *here*So it can't find a class called Product with an accessible constructor Product(int, String, int, double).
product = new Product(2, "Dressing", 6, 3.00); *here*
inv.add(product, 1);
product = new Product(3, "Bacon Bits", 2, 1.75);*here*
inv.add(product, 2);
product = new Product(4, "Croutons", 1, 1.75); *here*
inv.add(product, 3);Ditto.
JButton next = new JButton("Next");
*here* next.addProduct(new Product() {JButton doesn't have an addProduct() method.
public Product(int item, int stock, double price) {This constructor doesn't match the constructor you are calling above, and there are no other constructors.
ProductItem = item; *here*You must have a typo. But don't use inital capitals on field names: use them only on class names.
return productItem;Here is evidence that you have a typo. Java is case-sensitive. Either the field is caled 'ProductItem' or it is called 'productItem', not both.
// bubble sortDo you have to do this for the homework? Bubble sort is never used in real code except by people who don't know what they're talking about. Use Collections.sort().
super(item,name,units, price);You should be getting a compile error here too. Ther is no such constructor for Product.
return Contents;And here. -
Cannot Find Symbol Error, please help.
I am brand new to Java, so sorry if this question is obvious, but I keep receiving the following error when i try and compile the following code Circle.java
Circle.java:17: cannot find symbol
symbol : constructor Point()
location: class pointClass.Point
^
Circle.java:18: cannot find symbol
symbol : method Point(double,double)
location: class pointClass.Point
super.Point(x,y); //set center to (x,y)
^
2 errors
I cant seem to figure out why I am getting this error, any help that anyone could provide would be greatly appreciated.
This is the code for Circle.java:
package circleClass;
import pointClass.*;
public class Circle extends Point
private double radius; //Add a double radius field.
public Circle()
super(0,0); //call Point?s constructor initializing center to (0,0)
radius = 0.0; //set radius to 0.0
public Circle(double x, double y, double r)
super.Point(x,y); //set center to (x,y)
radius = r; //set radius to r
public double r()
return radius; //returns radius.
public double getArea()
return Math.PI*(radius*radius); //returns area of Circle object
public double getCircumference()
return 2*Math.PI*radius; //returns circumference of Circle object
public String toString()
return "center: ("+x+","+y+")"+"\nradius: "+r; //returns String that will give
//output of the format...
//center: (x,y)
//radius: r
If it helps, this is the code for pointClass:
package pointClass;
public class Point
private double xcoor,ycoor;
public static final Point ORIGIN = new Point();
private Point()
xcoor = 0;
ycoor = 0;
public Point(double x, double y)
xcoor = x;
ycoor = y;
public double x()
return xcoor;
public double y()
return ycoor;
public String toString()
return "(" + xcoor + "," + ycoor + ")";
public static double distance(Point p, Point q)
double dx = q.xcoor - p.xcoor;
double dy = q.ycoor - p.ycoor;
return Math.sqrt(dx*dx + dy*dy);
Thanks for your help.{color:#000080}Both of your classes need to be in the same package, not each one in a package of its own. You have imported pointClass.Pont in Circle.java, but I don't think that's what you want to do. For a better understanding of packages, read{color}
http://java.sun.com/docs/books/tutorial/java/package/index.html
And post code like this:
[code]CODE[/code] is displayed as CODE{color:#000080}db{color} -
Please help with cannot find symbol error. Been struggling all day :(
Hi all. :)
Writing a game for my phone with KToolbar and have been getting a cannot find symbol error for every variable and method I try to use across Classes. I've looked all over and though it seems a common problem I always either don't understand or can't get working the various solutions. Example of my errors:
C:\...\BTK800i.java:197: cannot find symbol
symbol : variable youSayWhat
location: class HelloCanvas
youSayWhat=key;
^
If I try BTK800i.variable or BTK800i.message I get a new error.
C:\...\src\BTK800i.java:184: non-static method newOrdersSarge() cannot be referenced from a static context
BTK800i.newOrdersSarge();
^
Both these errors apply to both variables and methods. It only happens when I'm using methods/variables of one class in another, am I using public and private incorrectly? It doesn't seem to make a difference if I make variables public or leave them private, I'm trying to get to them with a public method within a private class. Is it something else? I really have no idea. :(
Here's my code, it's long enough to be a tiresome read so I've tried to skip what I know isn't relevant.
public class BTK800i extends MIDlet {
private Display myDisplay;
private HelloCanvas myCanvas;
public int youSayWhat;
//a whole bunch more skipped here, but I'm fairly certain it's not anything that'll help find a solution
public BTK800i() {
paused=false;
public void startApp() throws MIDletStateChangeException {
if( paused ) {
myCanvas.repaint();
else {
myDisplay=Display.getDisplay(this);
myCanvas=new HelloCanvas();
myDisplay.setCurrent(myCanvas);
myCanvas.setFullScreenMode(true);
youSayWhat=0;
//again with the skipping, more code not related
public void newOrdersSarge() {
//whole bunch of code
//other methods skipped
class HelloCanvas extends Canvas {
public void keyPressed (int key) {
youSayWhat=key;
repaint ();
//skippage
}The stuff I skipped is mainly either more of the same sorta thing or maths/writing to screen stuff.
Thanks alot to anyone who helps. I'm really struggling with this. :(
Dan.But I have been reading them :(
My next-door neighbour unfortunately is an 80-something married man, but I will go have a looksie about static and instances.
I thought the point of public variables was that other classes could use them, is this wrong?
Also does this mean that to use the variables from my BTK class in the HelloCanvas class I need to first instantiate BTK? I don't understand how that works as the code starts running from the BTK class in the first place :S I guess more reading will help with this.
Thanks very much for replying. :)
Edit:
OK I have read up on it but I don't think I found anything I hadn't read before. I tried to make a new class which I could instantiate to hold all the variables and methods I wanted everything to be able to access, but that went disastrously. Am I right in understanding that there are no global variables in Java? :s
Edited by: Dan69 on Apr 17, 2010 1:15 PM -
Help - cannot find symbol error
Can someone help me? I am getting "cannot find symbol" error in my code and cannot figure out why. Here is my code:
public class toyInventory
private String[] toyInventory = {"ball", "bat", "bear", "car", "doll", "game", "glove", "playstation", "train"};
private int[] nineArray = {0,0,0,0,0,0,0,0};
int invItems = 0;
public void countToy()
String orderInput[] = {"bear", "train", "car", "ball", "doll", "ball", "train", "doll", "game", "train", "bear", "doll", "train", "car", "ball", "bat", "glove", "bat", "b", "doll", "bear", "ball", "doll", "bat", "car", "glove", "train", "doll", "bear"};
int noMatch;
for(int a = 0; a < orderInput.length; a++)
noMatch = 0;
for(int b = 0; b < toyInventory.length; b++)
if(orderInput[a] == toyInventory)
noMatch = 1;
break;
if(noMatch == 0)
invItems = 1;
public void printItems()
for(int c = 0; c < toyInventory.length; c++)
if (countToy[c] > 4)<-------- cannot find symbol error here
System.out.print("*");
System.out.print(toyInventory[c] + "\t" + countToy[c] + "\n"); <----cannot find symbol error here also
System.out.print("The number of invalid items in the order is" + invItems);
public static void main( String[] args)
toyInventory collection = new toyInventory ();
collection.countToy();
collection.printItems();public void countToy()
String orderInput[] = {"bear", "train", "car", "ball", "doll", "ball", "train", "doll", "game", "train", "bear", "doll", "train", "car", "ball", "bat", "glove", "bat", "b", "doll", "bear", "ball", "doll", "bat", "car", "glove", "train", "doll", "bear"};In the above code you have declared countToy() as method and while in the below lines you are calling countToy[] as an array. So please check that...
if (countToy[c] > 4)<-------- cannot find symbol error here
System.out.print("*");
System.out.print(toyInventory[c] + "\t" + countToy[c] + "\n"); <----cannot find symbol error here also
} -
Need help with class info and cannot find symbol error.
I having problems with a cannot find symbol error. I cant seem to figure it out.
I have about 12 of them in a program I am trying to do. I was wondering if anyone could help me out?
Here is some code I am working on:
// This will test the invoice class application.
// This program involves a hardware store's invoice.
//import java.util.*;
public class InvoiceTest
public static void main( String args[] )
Invoice invoice1 = new Invoice( "1234", "Hammer", 2, 14.95 );
// display invoice1
System.out.println("Original invoice information" );
System.out.println("Part number: ", invoice1.getPartNumber() );
System.out.println("Description: ", invoice1.getPartDescription() );
System.out.println("Quantity: ", invoice1.getQuantity() );
System.out.println("Price: ", invoice1.getPricePerItem() );
System.out.println("Invoice amount: ", invoice1.getInvoiceAmount() );
// change invoice1's data
invoice1.setPartNumber( "001234" );
invoice1.setPartDescription( "Yellow Hammer" );
invoice1.setQuantity( 3 );
invoice1.setPricePerItem( 19.49 );
// display invoice1 with new data
System.out.println("Updated invoice information" );
System.out.println("Part number: ", invoice1.getPartNumber() );
System.out.println("Description: ", invoice1.getPartDescription() );
System.out.println("Quantity: ", invoice1.getQuantity() );
System.out.println("Price: ", invoice1.getPricePerItem() );
System.out.println("Invoice amount: ", invoice1.getInvoiceAmount() );
and that uses this class file:
public class Invoice
private String partNumber;
private String partDescription;
private int quantityPurchased;
private double pricePerItem;
public Invoice( String ID, String desc, int purchased, double price )
partNumber = ID;
partDescription = desc;
if ( purchased >= 0 )
quantityPurchased = purchased;
if ( price > 0 )
pricePerItem = price;
public double getInvoiceAmount()
return quantityPurchased * pricePerItem;
public void setPartNumber( String newNumber )
partNumber = newNumber;
System.out.println(partDescription+" has changed to part "+newNumber);
public String getPartNumber()
return partNumber;
public void setDescription( String newDescription )
System.out.printf("%s now refers to %s, not %s.\n",
partNumber, newDescription, partDescription);
partDescription = newDescription;
public String getDescription()
return partDescription;
public void setPricePerItem( double newPrice )
if ( newPrice > 0 )
pricePerItem = newPrice;
public double getPricePerItem()
return pricePerItem;
Any tips for helping me out?System.out.println("Part number:
"+invoice1.getPartNumber;
The + sign will concatenate invoice1.getPartNumber()
after "Part number: " forming only one String.I added the plus sign and it gives me more errors:
C:\>javac InvoiceTest.java
InvoiceTest.java:16: operator + cannot be applied to java.lang.String
System.out.println("Part number: ", + invoice1.getPartNumber() );
^
InvoiceTest.java:17: cannot find symbol
symbol : method getPartDescription()
location: class Invoice
System.out.println("Description: ", + invoice1.getPartDescription() );
^
InvoiceTest.java:17: cannot find symbol
symbol : method println(java.lang.String,int)
location: class java.io.PrintStream
System.out.println("Description: ", + invoice1.getPartDescription() );
^
InvoiceTest.java:18: cannot find symbol
symbol : method getQuantity()
location: class Invoice
System.out.println("Quantity: ", + invoice1.getQuantity() );
^
InvoiceTest.java:18: cannot find symbol
symbol : method println(java.lang.String,int)
location: class java.io.PrintStream
System.out.println("Quantity: ", + invoice1.getQuantity() );
^
InvoiceTest.java:19: cannot find symbol
symbol : method println(java.lang.String,double)
location: class java.io.PrintStream
System.out.println("Price: ", + invoice1.getPricePerItem() );
^
InvoiceTest.java:20: cannot find symbol
symbol : method println(java.lang.String,double)
location: class java.io.PrintStream
System.out.println("Invoice amount: ", + invoice1.getInvoiceAmount() );
^
InvoiceTest.java:24: cannot find symbol
symbol : method setPartDescription(java.lang.String)
location: class Invoice
invoice1.setPartDescription( "Yellow Hammer" );
^
InvoiceTest.java:25: cannot find symbol
symbol : method setQuantity(int)
location: class Invoice
invoice1.setQuantity( 3 );
^
InvoiceTest.java:30: operator + cannot be applied to java.lang.String
System.out.println("Part number: ", + invoice1.getPartNumber() );
^
InvoiceTest.java:31: cannot find symbol
symbol : method getPartDescription()
location: class Invoice
System.out.println("Description: ", + invoice1.getPartDescription() );
^
InvoiceTest.java:31: cannot find symbol
symbol : method println(java.lang.String,int)
location: class java.io.PrintStream
System.out.println("Description: ", + invoice1.getPartDescription() );
^
InvoiceTest.java:32: cannot find symbol
symbol : method getQuantity()
location: class Invoice
System.out.println("Quantity: ", + invoice1.getQuantity() );
^
InvoiceTest.java:32: cannot find symbol
symbol : method println(java.lang.String,int)
location: class java.io.PrintStream
System.out.println("Quantity: ", + invoice1.getQuantity() );
^
InvoiceTest.java:33: cannot find symbol
symbol : method println(java.lang.String,double)
location: class java.io.PrintStream
System.out.println("Price: ", + invoice1.getPricePerItem() );
^
InvoiceTest.java:34: cannot find symbol
symbol : method println(java.lang.String,double)
location: class java.io.PrintStream
System.out.println("Invoice amount: ", + invoice1.getInvoiceAmount() );
^
16 errors -
Why does the main class cannot find symbol symbol : constructor Car(double) location:
class Car .. ??
class Car
{ //variable declaration
double milesStart; double milesEnd; double gallons;
//constructors
public Car(double start, double end, double gall)
{ milesStart = start; milesEnd = end; gallons = gall; }
void fillUp(double milesE, double gall)
{ milesEnd = milesE; gallons = gall; }
//methods
double calculateMPG()
{ return (milesEnd - milesStart)/gallons; }
boolean gashog() { if(calculateMPG()<15) { return true; } else { return false; } }
boolean economycar() { if(calculateMPG()>30) { return true; } else { return false; } } }
import java.util.*; class MilesPerGallon
{ public static void main(String[] args)
double milesS, milesE, gallonsU;
Scanner scan = new Scanner(System.in);
System.out.println(\"New car odometer reading: 00000\");
Car car = new Car(milesS); car.fillUp(milesE, gallonsU);
System.out.println(\"New Miles: \" + milesE); milesE = scan.nextDouble();
System.out.println(\"Gallons used: \" + gallonsU);
gallonsU = scan.nextDouble();
System.out.println( \"MPG: \" + car.calculateMPG() );
if(car.gashog()==true) { System.out.println(\"Gas Hog!\");
if(car.economycar()==true) { System.out.println(\"Economy Car!\");
} System.out.println(\"\");
milesS = milesS + milesE;
System.out.println(\"Enter new miles\");
milesE = scan.nextDouble();
System.out.println(\"Enter gallons used: \");
gallonsU = scan.nextDouble();
car.fillUp(milesE, gallonsU);
System.out.println(\"Initial miles: \" + milesS);
System.out.println(\"New Miles: \" + milesE);
System.out.println(\"Gallons used: \" + gallonsU);
System.out.println( \"MPG: \" + car.calculateMPG() );
System.out.println(\"\"); } }Why does the main class cannot find symbol symbol : constructor Car(double) location:
class Car .. ??
Please tell us which line of code you posted shows 'Car (double)'.
The only constructor that I see is this one:
Car(double start, double end, double gall) -
Help! Getting the cannot find symbol error.
Hello everyone. I have gone throught my whole program and I am still getting a cannot find symbol error. What does this error mean exactly? Here is the code below. I am trying to color a background using a comobox method.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import java.awt.GridLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JComboBox;
public class ComboboxFrame extends JFrame
public ComboboxFrame()
colorPanel = new JPanel();
colorPanel.setPreferredSize(new Dimension(PANEL_WIDTH, PANEL_HEIGHT));
getContentPane().add(colorPanel, BorderLayout.CENTER);
class ChoiceListener implements ActionListener
public void actionPerformed(ActionEvent event)
setbackgroundColor();
listener = new ChoiceListener();
createControlPanel();
setbackgroundColor();
pack();
private void createControlPanel()
JPanel colorPanel = createComboBox();
JPanel controlPanel = new JPanel();
controlPanel.setLayout(new GridLayout(1, 1));
controlPanel.add(colorPanel);
getContentPane().add(
controlPanel, BorderLayout.SOUTH);
public JPanel createComboBox()
colorCombo = new JComboBox();
colorCombo.addItem("Red");
colorCombo.addItem("Green");
colorCombo.addItem("Blue");
colorCombo.setEditable(true);
colorCombo.addActionListener(listener);
JPanel panel = new JPanel();
panel.add(colorCombo);
return panel;
public void setbackgroundColor()
String color = (String)colorCombo.getSelectedItem();
colorPanel.setbackgroundColor(new backgroungColor(color));
colorPanel.repaint();
private JPanel colorPanel;
private static final int PANEL_WIDTH = 300;
private static final int PANEL_HEIGHT = 300;
private JComboBox colorCombo;
private ActionListener listener;
}The line with the error is: colorPanel.setbackgroundColor(new backgroungColor(color));
Here is the second file
import javax.swing.JFrame;
public class backgroundTest
public static void main(String[] args)
JFrame frame = new comboboxFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}Any help would be appreciated. Thank youHello everyone. I have gone throught my whole
program and I am still getting a cannot find symbol
error. "Symbol" here means variable or method name (or maybe class name, but I think it will specifically bitch about classnames in that case).
String foo = "foo";
System.out.println(zoo); // no such variable as zoo. So...
colorPanel.setbackgroundColor(new backgroungColor(color));Looks like colorPanel or setbackgroundColor(new backgroungColor doesn't exist.
Note that spelling and capitalization count. Java's really anal that way. -
HI
Hi cannot receive or send emails from yahoo account. Tried resetting but nothing helps. Message comes up Cannot find Server,please assist thank you!iOS: Unable to send or receive email
http://support.apple.com/kb/TS3899
Can’t Send Emails on iPad – Troubleshooting Steps
http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/
Setting up and troubleshooting Mail
http://www.apple.com/support/ipad/assistant/mail/
iPad Mail
http://www.apple.com/support/ipad/mail/
Try this first - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)
Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts Tap on the Account, then on the red button that says Remove Account.
Cheers, Tom -
Help with 'cannot find symbol' error
Ive written the following code. It is an excerpt from my entire class.
When I try to compile the code I get the error:-
cannot find symbol
Symbol: variable playerRun1
location: this class
public void analysePlayerMove()
if (playerGo == true)
if (playerMove.getComponentCount() == 0)
JOptionPane.showMessageDialog(this, "You Have Not Made A Move", "Empty Move", JOptionPane.ERROR_MESSAGE);
else
if (areTherePickUps == false)
for (int j=0; j<playerMove.getComponentCount(); j++)
//reversing the players hand, because what is displayed on the GUI is reversed
Component[] playerRun = playerMove.getComponentsInLayer(playerMove.DEFAULT_LAYER);
Component[] playerRun1 = new Component[playerRun.length];
int reverse = playerRun.length-1;
for (int k=0; k<playerRun.length; k++)
playerRun1[k] = playerRun[reverse];
reverse--;
if (acePlayed == true && playerRun1.length == 1)
if (playerRun1[0] != acePlayedSuit)
JOptionPane.showMessageDialog(this, "Your Move Is Not Valid", "Invalid Move", JOptionPane.ERROR_MESSAGE);
else
//remove the cards from the players move hand and add them to the bottom of the shredded deck
}I dont understand why I am getting this error, I clearly define the variable.Yes, but the variable is declared inside a block and so it's local to that block. You can't use it outside its scope, which is the block in which you declared it. Re-read the section of your book about variable scope.
-
Help a Beginner? cannot find symbol error?
class Box {
double width;
double height;
double depth;
Box(Box ob) {
width = ob.width;
height = ob.height;
depth = ob.depth;
Box(double w, double h, double d) {
width = w;
height = h;
depth = d;
double volume() {
return width * height * depth;
class BoxWeight extends Box {
double weight;
BoxWeight(double w, double h, double d, double m) {
width = w;
height = h;
depth = d;
weight = m;
class DemoBoxWeight {
public static void main(String[] args) {
BoxWeight mybox1 = new BoxWeight(10, 20, 35, 34);
double vol;
vol = mybox1.volume();
System.out.println("Weight of mybox1 is " + mybox1.weight);
okay, this is basically from a book, but when I compile it in TextPad, it reads
C:\Documents and Settings\Guest 1\Desktop\EPGY C015\Box\Box.java:27: cannot find symbol
symbol : constructor Box()
location: class Box
BoxWeight(double w, double h, double d, double m) {
^
1 error
Tool completed with exit code 1
Why is that and how can I fix it? :PWhenever you extend a class (here you're extending Box with BoxWeight), and create the subclass's constructor, the parent class's (or super class's) constructor gets called first whether it is explicitly called or not. So here in the BoxWeight constructor, the Box constructor is implicitly called:
BoxWeight(double w, double h, double d, double m) {
// even though you don't specify it, the Box() constructor is called here.
// it's as if you have here the call:
super();
width = w;
height = h;
depth = d;
weight = m;
}If you don't specify the super(), it get's implicitly called as the first call in the BoxWeight constructor. Notice that the implicit constructor has no parameters. Since Box does not have a constructor without parameters, this will throw an error. To get around this, you should explicitly call the super constructor with its proper parameters as the first method called in your BoxWeight constructor:
BoxWeight(double w, double h, double d, double m) {
super(w, h, d); // *** here ***
width = w;
height = h;
depth = d;
weight = m;
} -
I'm trying to work on lessons from a book called Java Server Faces. Only problem is there seems to be a java file i cannot compile. Maybe someone here can see whats up?
here is the error i get when i run javac TableData.java
TableData.java:4: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
private static final Name[] names = new Name[] {
^
TableData.java:11: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
public Name[] getNames() { return names;}
^
TableData.java:4: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
private static final Name[] names = new Name[] {
^
TableData.java:5: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
new Name("William", "Dupont"),
^
TableData.java:6: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
new Name("Anna", "Keeney"),
^
TableData.java:7: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
new Name("Mariko", "Randor"),
^
TableData.java:8: cannot find symbol
symbol : class Name
location: class com.corejsf.TableData
new Name("John", "Wilson")here is the code
package com.corejsf;
public class TableData {
private static final Name[] names = new Name[] {
new Name("William", "Dupont"),
new Name("Anna", "Keeney"),
new Name("Mariko", "Randor"),
new Name("John", "Wilson")
public Name[] getNames() { return names;}
}I believe i have all my jar files properly located in webapps/xxx/web-inf/lib
but i could be wrong..
thanksIf its a sample application from some place they should have provide it. Otherwise if the Name class usage is simple you can create the class file yourself.
Subsequently you can create you own jar file for this using the
jar cvf [jar file name].jar [package folders]\*.class
and place it in WEB-INF/lib
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