"cannot find symbol" error while compiling the RMI
I am trying to implement a simple RMI.
I have the following :
1. HelloInterface which has the SayHello method defined.
2. HelloImpl which has the implementation of Say Hello
3. Server code
4. Client code
the HelloInterface compiles properly.
but when i say javac HelloImpl
package rmisample;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.RemoteException;
public class HelloImpl extends UnicastRemoteObject implements HelloInterface{ --> this is where i get the error
/** Creates a new instance of HelloImpl */
public HelloImpl()throws RemoteException {
super();
public String SayHello(String s) throws RemoteException
return "hello" +s;
I get the following error:
C:\Myjava\RMISample\src\rmisample>javac HelloImpl.java
HelloImpl.java:18: cannot find symbol
symbol: class HelloInterface
public class HelloImpl extends UnicastRemoteObject implements HelloInterface{
All 4 files are in the same directory.
Am not sure what is going wrong and am new to this.
Edited by: topcatin on Sep 14, 2007 6:52 AM
The problem is probably that the compiler can't find the file with that class definition.
Try changing your javac call so that is starts off
javac -classpath .
The dot is important!
If it works, then go read up on classpaths.
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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
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hi,
i am new to ejb.......
i have got error while compiling the ejb java source files............
while compiling..........of this three i ahve got err in ejb home interface....
ejb remote interface - succeded
ejb bean class - succeded
ejb home interface - error
the error..............is in the return type of the ejb create() method in ejb home interface(which is the type of remote interface).
the error message is cannot resolve symbolHi,
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i have done enough searching in all sites including sun forum but in vain
i have pasted my error below...
can u plz predict anything from it
D:\>path=%path%;c:\j2sdk1.4.2_12\bin;
D:\>set classpath=%classpath%;d:\Sun\AppServer\lib\j2ee.jar;
D:\>javac d:\Librarys\Library.java
D:\>javac d:\Librarys\LibraryBean.java
D:\>javac d:\Librarys\LibraryHome.java
d:\Librarys\LibraryHome.java:8: cannot resolve symbol
symbol : class Library
location: interface Librarys.LibraryHome
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) throws RemoteException, CreateException;
^
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symbol : class Library
location: interface Librarys.LibraryHome
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eption;
^
2 errors
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Cannot find symbol error.. really stuck.
I have a class named Rectangle.java. It is in a package "Geometry" together with Point.java and Line.java. But when I try to use Rectangle.java in my main program, MyRect.java, it gives me a "cannot find symbol" error, particularly the methods and sometimes the variables. I tried compiling just my Rectangle class and it compiled fine.. And I tried the Line and Point classes on another program and it works fine... well probably because the Line and Point classes are from a book(Ivor Horton's Beginning Java 2).. I am just starting out in Java. :)
Rectangle.java
package Geometry;
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public Point[] corner = new Point[4];
public String name;
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corner[3].setPoints(1,1);
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corner[0].setPoints(point1_x, point1_y);
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name = new String(Name);
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corner[3] = oldRect.corner[3];
corner[1] = oldRect.corner[1];
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import Geometry.*;
public class MyRect{
public static void main(String[] args){
Rectangle myRect = new Rectangle(0,0,2,1);
Rectangle copyRect = new Rectangle(myRect);
printRectangle(myRect);
double width = myRect.getWidth();
}and the errors:
MyRect.java:4: cannot find symbol
symbol : constructor Rectangle(double,double,double,double,java.lang.String)
location: class Rectangle
Rectangle myRect = new Rectangle(0.0,0.0,2.0,1.0,"My Rectangle")
^
MyRect.java:9: cannot find symbol
symbol : variable name
location: class Rectangle
System.out.println(myRect.name);
^
2 errorsAre you sure you have posted the whole content of MyRect.java
import Geometry.*;
public class MyRect{
public static void main(String[] args){
Rectangle myRect = new Rectangle(0,0,2,1);
Rectangle copyRect = new Rectangle(myRect);
printRectangle(myRect);
double width = myRect.getWidth();
}I don't see the following error line in the code you have given.
MyRect.java:4: cannot find symbol
symbol : constructor Rectangle(double,double,double,double,java.lang.String)
location: class Rectangle
Rectangle myRect = new Rectangle(0.0,0.0,2.0,1.0,"My Rectangle")
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System.out.println(myRect.name);
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2 errors -
"Cannot find Symbol" error message
I have a "cannot find symbol" error message on line 5 below in
the driver class.
Thank you for your assistance
1 public class GameLauncher
2 {
3 public static void main(String[] args)
4 {
5 GuessGame game = new GuessGame();
6 game.startGame();
7 }
8}
public class GuessGame
public void startGame()
Player p1;
Player p2;
Player p3;
int guessp1 = 0;
int guessp2 = 0;
int guessp3 = 0;
boolean p1isRight = false;
boolean p2isRight = false;
boolean p3isRight = false;
int targetNumber = (int) (Math.random() * 10);
System.out.println(" I'm thinking of a number between 0 and 9....");
while(true)
p1.guess();
p2.guess();
p3.guess();
guessp1 = p1.number;
System.out.println("Player one guessed " + guessp1);
guessp2 = p2.number;
System.out.println("Player two guessed " + guessp2);
guessp3 = p3.number;
System.out.println("Player three guessed " + guessp3);
if (guessp1 == targetNumber)
p1isRight = true;
if (guessp2 == targetNumber)
p2isRight = true;
if (guessp3 == targetNumber)
p3isRight = true;
if ( p1isRight || p2isRight || p3isRight)
System.out.println("We have a winner ! ");
System.out.println("Player one got it right? " + p1isRight);
System.out.println("Player two got it right? " + p2isRight);
System.out.println("Player three got it right? " + p3isRight);
System.out.println("Game is over ! ");
break; //game is over so break out of loop
else
//we must keep going because no one guessed the number !
System.out.println(" Players will have to try again ! ");
} // end of if/else
} // end of loop
} // end of startGame() method
} //end of class
public class Player
int number = 0; // the guess is stored here
public void guess()
System.out.println(" I'm guessing " + number);
---------------------------------------------------------------Thank you . You were right . I didn't set up the classes correctly.
I corrected a few other errors and the program runs ok !
Below is the corrected code and the output
public class GameLauncher
public static void main(String[] args)
GuessGame game = new GuessGame();
game.startGame();
/* One possible set of output is
I'm thinking of a number between 0 and 3....
I'm guessing 1
I'm guessing 3
I'm guessing 0
Player one guessed 1
Player two guessed 3
Player three guessed 0
We have a winner !
Player one got it right? true
Player two got it right? false
Player three got it right? false
Game is over !
public class Player
int number = 0; // the guess is stored here
public void guess()
number = (int)(Math.random() * 4);
System.out.println(" I'm guessing " + number);
public class GuessGame
public void startGame()
int x = 0;
Player p1 = new Player();
Player p2 = new Player();
Player p3 = new Player();
int guessp1 = 0;
int guessp2 = 0;
int guessp3 = 0;
boolean p1isRight = false;
boolean p2isRight = false;
boolean p3isRight = false;
int targetNumber = (int) (Math.random() * 4);
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while(x <5)
p1.guess();
p2.guess();
p3.guess();
guessp1 = p1.number;
System.out.println("\nPlayer one guessed " + guessp1);
guessp2 = p2.number;
System.out.println("Player two guessed " + guessp2);
guessp3 = p3.number;
System.out.println("Player three guessed " + guessp3);
if (guessp1 == targetNumber)
p1isRight = true;
if (guessp2 == targetNumber)
p2isRight = true;
if (guessp3 == targetNumber)
p3isRight = true;
if ( p1isRight || p2isRight || p3isRight)
System.out.println("\nWe have a winner ! ");
System.out.println("Player one got it right? " + p1isRight);
System.out.println("Player two got it right? " + p2isRight);
System.out.println("Player three got it right? " + p3isRight);
System.out.println("Game is over ! ");
break; //game is over so break out of loop
else
//we must keep going because no one guessed the number !
System.out.println(" Players will have to try again ! ");
} // end of if/else
x = x + 1;
} // end of loop
} // end of startGame() method
} //end of class -
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 -
Cannot find symbol error. don't know why
Hello, I'm trying to write a button bean in the shape of a triangle but netbeans keeps throwing up a cannot find symbol error at my g.fillPolygon line. I've declared the number of sides and x and y coords.
Any ideas as to why this is happening would be greatly appreciated.
Here's the code:
package trianglebutton;
import java.util.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;
public class TriangleButtonBean extends JButton implements Serializable
private TriangleButtonBean graphicPolygon;
private Color buttonColour;
private Color textColour;
private String caption;
private int sides = 3;
private int size = 30;
private int centerX = 100;
private int centerY = 100;
public TriangleButtonBean()
super();
setPreferredSize(new Dimension(50,50));
setBorder(null);
buttonColour = Color.red;
textColour = Color.black;
caption = "";
public TriangleButtonBean(String acaption)
super();
setPreferredSize(new Dimension(50,50));
setBorder(null);
caption = acaption;
public void paintComponent(Graphics g)
String astring;
super.paintComponent(g);
g.setColor(buttonColour);
int centerX = graphicPolygon.getCenterX(); //Invoking getCenterX method
int centerY = graphicPolygon.getCenterY(); //Invoking getCenterY method
//int Xcoordinates [] = graphicPolygon.getPolygonXCoordinates(sides,size);
//int Ycoordinates [] = graphicPolygon.getPolygonYCoordinates(sides,size);
g.drawPolygon(centerX,centerY, sides); //Draw polygon using xcoord,ycoord and number of sides
g.fillPolygon(centerX,centerY, sides); //Fill poly
g.setColor(textColour);
if (caption.length() > 1)
astring = caption.substring(0,1);
else
astring = caption;
g.drawString(astring,22,27);
public void setButtonColour(Color acolour)
buttonColour = acolour;
repaint();
public Color getButtonColour()
return buttonColour;
public void setTextColour(Color acolour)
textColour = acolour;
repaint();
public Color getTextColour()
return textColour;
public void setCaption(String acaption)
caption = acaption;
repaint();
public String getCaption()
return caption;
// public void setCenterX(int xcoords)
// centerX = xcoords;
public int getCenterX()
return centerX;
// public void setCenterY(int ycoords)
// centerY = ycoords;
public int getCenterY()
return centerY;
public static void main(String[] args){
TriangleButtonBean agui = new TriangleButtonBean();
} // End of classPlease READ, STUDY, and UNDERSTAND the error messages, they are telling you exactly what the problem is:
. . .\TriangleButtonBean.java:56: cannot find symbol
symbol : method drawPolygon(int,int,int)
location: class java.awt.Graphics
g.drawPolygon(centerX,centerY, sides); //Draw polygon using xcoord,ycoord and number of sides
^
. . .\TriangleButtonBean.java:57: cannot find symbol
symbol : method fillPolygon(int,int,int)
location: class java.awt.Graphics
g.fillPolygon(centerX,centerY, sides); //Fill poly
^
2 errors
Process javac exited with code 1In both cases the messages ar telling you that the methods
drawPolygon(int,int,int)
method fillPolygon(int,int,int)
can't be found in java.awt.Graphics
And if you look at the documentation, you see that is indeed the problem - the first two arguments are int arrrays, not int.
Fix the method signature or use something else. -
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
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