BufferedReader cannot resolve symbol
Hi,
I need some help with a java program which reads xml files to a specified location, running it on a UNIX machine using Java 1.4.1. I modified the code to include the BufferedReader class, but it keeps complaining about not being able to resolve symbol at line 50 & 53. Any help here would be appreciated, since I'm a newbie.
bash-2.05$ javac outputScript.java
outputScript.java:50: cannot resolve symbol
symbol : constructor InputStreamReader (java.lang.String)
location: class java.io.InputStreamReader
BufferedReader in = new BufferedReader(new InputStreamReader("in"));
^
outputScript.java:53: cannot resolve symbol
symbol : method available ()
location: class java.io.BufferedReader
while (in.available() !=0)
Here's the code:
//package cognos8_3;
import java.io.*;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.File;
* outputScript.java
* Copyright Cognos Incorporated. All Rights Reserved.
* Cognos and the Cognos logo are trademarks of Cognos Incorporated.
* Description: (KB 1013700) - Sample script that will rename output files generated by CM.OUTPUTLOCATION - Cognos 8.3
class outputScript
public static void main(String args[])
String reportName = "";
String reportViewName = "";
String outputLocation = "/data/cognos/rn_filecp/";
String defName = "";
String ofTime = "";
String burstKey = "";
int countRenamed = 0;
// get the list of desc files in the outputlocation
File descFiles = new File(outputLocation);
String[] children = descFiles.list();
if (children == null || children.length == 0)
System.out.println("Invalid file location or no reports found to rename.");
else
System.out.println("Found " + children.length + " files in this location, search for file names containing '_desc.'.");
for (int i=0; i<children.length; i++)
try
// Get filename of file or directory
String filename = children;
if (filename.indexOf("_desc.")>=0)
// Open the file that is the first
// command line parameter
FileInputStream fstream = new FileInputStream(outputLocation+filename);
FileInputStream bis = new FileInputStream(fstream);
BufferedReader in = new BufferedReader(new InputStreamReader("bis.in"));
// Continue to read lines while there are still some left to read
while (in.available() !=0)
String temp = in.readLine();
System.out.println(temp);
// check for report name
if (temp.indexOf("report[@name=")>0)
// get beginning of name
int startIndex = temp.indexOf("report[@name='");
String startString;
int endIndex = 0;
if (startIndex > 0)
startString = temp.substring(startIndex);
startIndex = startString.indexOf("'") + 5; //' 6 characters
endIndex = startString.lastIndexOf("'");
else
startIndex = temp.indexOf("report[@name=");
startString = temp.substring(startIndex);
startIndex = startString.indexOf("@name=") + 6; //' 6 characters
endIndex = startString.lastIndexOf("]");
// get report name
reportName = startString.substring(startIndex+1, endIndex);
//System.out.println("Found report name - " + reportName);
else if (temp.indexOf("reportView[@name=")>0)
// get beginning of name
int startIndex = temp.indexOf("reportView[@name='");
String startString;
int endIndex = 0;
if (startIndex > 0)
startString = temp.substring(startIndex);
startIndex = startString.indexOf("'") + 5; //' 6 characters
endIndex = startString.lastIndexOf("'");
else
startIndex = temp.indexOf("reportView[@name=");
startString = temp.substring(startIndex);
startIndex = startString.indexOf("@name=") + 6; //' 6 characters
endIndex = startString.lastIndexOf("]");
// get report name
reportViewName = startString.substring(startIndex+1, endIndex);
//System.out.println("Found reportView name - " + reportViewName);
else if (temp.indexOf("</fileName>")>0) //check for default name
defName = temp.substring(temp.indexOf(">")+1, temp.lastIndexOf("<"));
else if (temp.indexOf("asOfTime")>=0) // get the time to assure uniqueness when saving
ofTime = temp.substring(temp.indexOf(">")+1, temp.lastIndexOf("<"));
// clean colons from time
ofTime = ofTime.replaceAll(":","_");
else if (temp.indexOf("</burstKey>")>=0)
burstKey = temp.substring(temp.indexOf(">")+1, temp.lastIndexOf("<"));
in.close();
if (reportName.length() == 0)
reportName = reportViewName;
//System.out.println("Renaming using view name - no report name found");
String format = defName.substring(defName.length()-3, defName.length());
// new description xml file
File file = new File(outputLocation+filename);
File newDescFile = new File(outputLocation + reportName+"_"+burstKey+"_"+ofTime+"DESC_" + format+ ".xml");
// new renamed specific format file.
File file3 = new File(outputLocation+defName);
File newDefFile = new File(outputLocation + reportName+"_"+burstKey+"_"+ofTime+"."+format);
boolean success = file3.renameTo(newDefFile);
if (!success)
// File was not successfully renamed
System.out.println("ERROR attempting to rename - " + file3.getAbsolutePath() + " to \n\t\t" +
newDefFile.getAbsolutePath());
else
countRenamed++;
// File was successfully renamed
System.out.println(countRenamed +") Renamed - " + file3.getAbsolutePath() + " to \n\t\t" +
newDefFile.getAbsolutePath());
// Rename file (or directory)
success = file.renameTo(newDescFile);
if (!success)
// File was not successfully renamed
System.out.println("ERROR attempting to rename - " + file.getAbsolutePath() + " to \n\t\t" +
newDescFile.getAbsolutePath());
else
// File was successfully renamed
System.out.println(" - " + file.getAbsolutePath() + " to \n\t\t" +
newDescFile.getAbsolutePath());
catch (Exception e)
System.err.println("File input error " + e.getMessage()) ;
System.out.println("Complete.");
Thanks,
Nick
Edited by: nickmills on Aug 31, 2008 5:05 PM
First, you only need to create the FileInputStream once. Then that's what you pass to the InputStreamReader constructor. Your code for reading from the BufferedReader is also wrong.FileInputStream fstream = new FileInputStream(outputLocation+filename);
// FileInputStream bis = new FileInputStream(fstream); <-- remove this line
BufferedReader in = new BufferedReader(new InputStreamReader(fstream));
// available() doesn't do what you think it does; forget about it.
// Here's the standard way to use a BufferedReader
String line = null;
while ((line = in.readLine()) != null)
// process 'line'
} There are probably other errors in the code, but reading all that unformatted code is too much of a hassle. In future, please use {code} tags when posting source code.
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Class error - cannot resolve symbol "MyDocumentListener"
Hello,
this is a groaner I'm sure, but I don't see the problem.
Newbie-itis probably ...
I'm not concerned with what the class does, but it would be nice for the silly thing to compile!
What the heck am I missing for "MyDocumentListener" ?
C:\divelog>javac -classpath C:\ CenterPanel.java
CenterPanel.java:53: cannot resolve symbol
symbol : class MyDocumentListener
location: class divelog.CenterPanel
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^
CenterPanel.java:53: cannot resolve symbol
symbol : class MyDocumentListener
location: class divelog.CenterPanel
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^
2 errors
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import java.awt.event.*;
import java.io.*;
import java.lang.*;
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private BufferedReader br ;
private String str;
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// ------ Document listener class -----------
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Calculate(e);
public void removeUpdate(DocumentEvent e) {
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jfc.setSize(400, 300);
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/* a: */
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// int messageType,
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+ "\n \nContinue?", // msg
"Warning! Overwrite File!", // title
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// JOptionPane.ERROR_MESSAGE
// JOptionPane.INFORMATION_MESSAGE
// JOptionPane.PLAIN_MESSAGE
// JOptionPane.QUESTION_MESSAGE
JOptionPane.WARNING_MESSAGE,
null);
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try {
jfc.cancelSelection();
break;
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BufferedWriter bw = new BufferedWriter(new FileWriter(fileName));
bw.write(comments.getText());
bw.flush();
bw.close();
comments.append( newline + newline + "Saving: " + fileName.getName() + "." + newline);
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} // closes try
catch (IOException ioe)
{ // open catch
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that's all folks
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// Assignment with objects is a bit tricky.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import com.bruceeckel.simpletest.*;
class Number {
int i;
public class Assignment {
static Test monitor = new Test();
public static void main(String[] args) {
Number n1 = new Number();
Number n2 = new Number();
n1.i = 9;
n2.i = 47;
System.out.println("1: n1.i: " + n1.i +
", n2.i: " + n2.i);
n1 = n2;
System.out.println("2: n1.i: " + n1.i +
", n2.i: " + n2.i);
n1.i = 27;
System.out.println("3: n1.i: " + n1.i +
", n2.i: " + n2.i);
monitor.expect(new String[] {
"1: n1.i: 9, n2.i: 47",
"2: n1.i: 47, n2.i: 47",
"3: n1.i: 27, n2.i: 27"
} ///:~
//: com:bruceeckel:simpletest:SimpleTestException.java
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
package com.bruceeckel.simpletest;
public class SimpleTestException extends RuntimeException {
public SimpleTestException(String msg) {
super(msg);
} ///:~
//: com:bruceeckel:simpletest:NumOfLinesException.java
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
package com.bruceeckel.simpletest;
public class NumOfLinesException extends SimpleTestException {
public NumOfLinesException(int exp, int out) {
super("Number of lines of output and "
+ "expected output did not match.\n" +
"expected: <" + exp + ">\n" +
"output: <" + out + "> lines)");
} ///:~
//: com:bruceeckel:simpletest:Test.java
// Simple utility for testing program output. Intercepts
// System.out to print both to the console and a buffer.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
package com.bruceeckel.simpletest;
import java.io.*;
import java.util.*;
import java.util.regex.*;
public class Test {
// Bit-shifted so they can be added together:
public static final int
EXACT = 1 << 0, // Lines must match exactly
AT_LEAST = 1 << 1, // Must be at least these lines
IGNORE_ORDER = 1 << 2, // Ignore line order
WAIT = 1 << 3; // Delay until all lines are output
private String className;
private TestStream testStream;
public Test() {
// Discover the name of the class this
// object was created within:
className =
new Throwable().getStackTrace()[1].getClassName();
testStream = new TestStream(className);
public static List fileToList(String fname) {
ArrayList list = new ArrayList();
try {
BufferedReader in =
new BufferedReader(new FileReader(fname));
try {
String line;
while((line = in.readLine()) != null) {
if(fname.endsWith(".txt"))
list.add(line);
else
list.add(new TestExpression(line));
} finally {
in.close();
} catch (IOException e) {
throw new RuntimeException(e);
return list;
public static List arrayToList(Object[] array) {
List l = new ArrayList();
for(int i = 0; i < array.length; i++) {
if(array[i] instanceof TestExpression) {
TestExpression re = (TestExpression)array;
for(int j = 0; j < re.getNumber(); j++)
l.add(re);
} else {
l.add(new TestExpression(array[i].toString()));
return l;
public void expect(Object[] exp, int flags) {
if((flags & WAIT) != 0)
while(testStream.numOfLines < exp.length) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
List output = fileToList(className + "Output.txt");
if((flags & IGNORE_ORDER) == IGNORE_ORDER)
OutputVerifier.verifyIgnoreOrder(output, exp);
else if((flags & AT_LEAST) == AT_LEAST)
OutputVerifier.verifyAtLeast(output,
arrayToList(exp));
else
OutputVerifier.verify(output, arrayToList(exp));
// Clean up the output file - see c06:Detergent.java
testStream.openOutputFile();
public void expect(Object[] expected) {
expect(expected, EXACT);
public void expect(Object[] expectFirst,
String fname, int flags) {
List expected = fileToList(fname);
for(int i = 0; i < expectFirst.length; i++)
expected.add(i, expectFirst[i]);
expect(expected.toArray(), flags);
public void expect(Object[] expectFirst, String fname) {
expect(expectFirst, fname, EXACT);
public void expect(String fname) {
expect(new Object[] {}, fname, EXACT);
} ///:~What do you have in the C:\TIJCode\ directory? Does the directory structure mimic the package structure for the stuff you're importing?
-
'Cannot Resolve Symbol' error when importing custom class
I get this error...
c:\mydocu~1\n307\auto.java:14: cannot resolve symbol
symbol: class Box
import Box;
^
when I try to compile auto.java, the applet that's supposed to import the class Box, which I built to be like a message box in VB. Here is the code for Box...
import java.awt.*;
import java.awt.event.*;
public class Box extends Window{
Label lblMsg = new Label();
Button cmdOk = new Button("OK");
Panel pnlSouth = new Panel();
EventHandler ehdlr=new EventHandler(this);
public Box(Frame parent){
super(parent);
setLayout(new BorderLayout());
add(lblMsg, BorderLayout.NORTH);
add(pnlSouth, BorderLayout.SOUTH);
pnlSouth.setLayout(new FlowLayout());
pnlSouth.add(cmdOk);
cmdOk.addActionListener(ehdlr);
this.addWindowListener(ehdlr);
public void speak(String msg){
lblMsg.setText(msg);
this.setLocation(200,200);
this.setSize(200,200);
this.setVisible(true);
private class EventHandler extends WindowAdapter
implements ActionListener{
Window theWindow;
public EventHandler(Window a){
theWindow=a;
public void actionPerformed(ActionEvent e){
theWindow.setVisible(false);
AND HERE IS THE CODE FOR AUTO...
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import Box;
public class auto extends Applet implements ActionListener{
Panel pnlCenter=new Panel();
Panel pnlSouth=new Panel();
Panel pnlNorth=new Panel();
Panel pnlCenterleft=new Panel();
Panel pnlCenterright=new Panel();
Button cmdSubmit=new Button("Submit");
Button cmdNext=new Button("Next");
Button cmdPrev=new Button("Previous");
Label lblLoc=new Label("LOCATION:");
Label lblDate=new Label("DATE:");
Label lblMile=new Label("MILEAGE:");
Label lblCost=new Label("COST:");
Label lblDesc=new Label("DESCRIPTION:");
Label lblFind=new Label("FIND LOCATION:");
Label lblDisp=new Label();
TextField txtLoc=new TextField();
TextField txtDate=new TextField();
TextField txtMile=new TextField();
TextField txtCost=new TextField();
TextArea txtDesc=new TextArea();
TextField txtFind=new TextField();
Box bxOne = new Box((Frame(this).getParent()));
/*by declaring these four variables here, they are instance level, meaning they are
available to the whole applet*/
String textFile="auto.txt";
String list[] = new String[100];
String sort[] = new String[100];
int counter=0;
int count=0;
String currentLine="";
int i;
int sortcount;
public void init(){
this.setLayout(new BorderLayout());
this.add(pnlNorth, BorderLayout.NORTH);
this.add(pnlCenter, BorderLayout.CENTER);
this.add(pnlSouth, BorderLayout.SOUTH);
pnlNorth.setLayout(new FlowLayout());
pnlNorth.add(new Label("VIEW RECORDS"));
pnlCenter.setLayout(new GridLayout(1,2));
pnlCenter.add(pnlCenterleft);
pnlCenter.add(pnlCenterright);
pnlCenterleft.setLayout(new GridLayout(0,1));
pnlCenterleft.add(lblLoc);
pnlCenterleft.add(lblDate);
pnlCenterleft.add(lblMile);
pnlCenterleft.add(lblCost);
pnlCenterleft.add(lblDesc);
pnlCenterleft.add(lblFind);
pnlCenterright.setLayout(new GridLayout(0,1));
pnlCenterright.add(txtLoc);
pnlCenterright.add(txtDate);
pnlCenterright.add(txtMile);
pnlCenterright.add(txtCost);
pnlCenterright.add(txtDesc);
pnlCenterright.add(txtFind);
pnlSouth.setLayout(new FlowLayout());
pnlSouth.add(cmdPrev);
pnlSouth.add(lblDisp);
pnlSouth.add(cmdSubmit);
pnlSouth.add(cmdNext);
lblDisp.setText("0 of 0");
cmdPrev.addActionListener(this);
cmdNext.addActionListener(this);
cmdSubmit.addActionListener(this);
public void actionPerformed(ActionEvent e){
String command=e.getActionCommand();
if (command.equals("Next")){
if(txtLoc.getText().equals("")){
reader();
transfer();
writer();
bxOne.speak("Viewing all records");
}else{
if(counter<count-2){
counter++;
writer();
}else{
//don't move
} else if (command.equals("Previous")){
if(txtLoc.getText().equals("")){
//do nothing
}else{
if(counter>0){
counter--;
writer();
}else{
//don't move
} else {
txtLoc.setText("");
txtDate.setText("");
txtMile.setText("");
txtCost.setText("");
txtDesc.setText("");
reader();
sorter();
writer();
private void writer(){
StringTokenizer stCurrent=new StringTokenizer(sort[counter], "\t");
txtLoc.setText(stCurrent.nextToken());
txtDate.setText(stCurrent.nextToken());
txtMile.setText(stCurrent.nextToken());
txtCost.setText(stCurrent.nextToken());
txtDesc.setText(stCurrent.nextToken());
lblDisp.setText(String.valueOf(counter+1) + " of " + String.valueOf(count-1));
private void reader(){
try{
URL textURL=new URL(getDocumentBase(), textFile);
InputStream issIn=textURL.openStream();
InputStreamReader isrIn=new InputStreamReader(issIn);
BufferedReader brIn=new BufferedReader(isrIn);
while(currentLine!=null){
currentLine=brIn.readLine();
list[count]=currentLine;
count++;
}catch(MalformedURLException exc){
System.out.println("MalformedURLException Error");
}catch(IOException exc){
System.out.println("IOException Error");
}catch(NullPointerException exc){
System.out.println("NullPointerException Error");
private void transfer(){
for(i=0;i<count;i++){
sort=list[i];
private void sorter(){
sortcount=0;
String find=txtFind.getText();
System.out.println(String.valueOf(count));
for(i=0;i<count-1;i++){
StringTokenizer st=new StringTokenizer(list[i], "\t");
String next=st.nextToken();
if (find.equals(next)){
sort[sortcount]=list[i];
sortcount++;
count=sortcount+1;
Any help is greatly appreciated.
2Willis4Hi agian,
I looked closer at your code, I think if you play around with directories and paths, you'll get it, and I think also when you import, you have to have put the class in a package...? Maybe? Blind leading the blind here! So at the top of your box class you have to say something like
package org.blah.lala
and you have to have that directory structure for the class files org/blah/lala/Box.class
Does that make sense?
And then when you import you say:
import org.blah.lala.Box
(I think)
I cna only imagine that this 'help' I am giving you would be hilarious to a more experienced programmer!
Anyway, best of luck. -
Visual Studio 2012 cannot resolve symbol or Errors control is not a member of class
Visual Studio 2012 Web Site Project (Note not a Web application, so there are not Designer.vb files) > Site works perfectly fine and using IIS and attaching to IIS to debug code.
However, if I try to build the site inside of Visual Studio I am getting lots of Errors ‘pnlName’ is not a member of ‘Page_Name’ In the code behind I am getting errors ‘Cannot resolve symbol ‘pnlName’
.ascx Page
<li style="margin-right:0;" id="pnlName" runat="server"><a href="/cart" title="Checkout" class="global-checkout">Checkout</a></li>
.ascx.vb page
Me.pnlName.Attributes.Remove("style")
I have cleaned, rebuild and nothing gets rid of these errors, but again the site works as designed, but I would like to launch and debug inside of Visual Studio.
Moojjoo MCP, MCTS
MCP Virtual Business Card
http://moojjoo.blogspot.comCor,
What I am stating is this is a solution using the Web Site Project instead of a
Web Application Project.
Web Site projects do not require Designer.vb files, Web Application Projects add Designer.vb files in the solution.
Background: I have been hired to support a very successful e-commerce site that was built by a 3rd party vendor (I had no input on the contract or specification, because I would have went with
MVC). The site works 100% correctly, however from my 2003 - 2015 experience with Visual Studio and Web Development being in Web Forms and MVC I have always built ASP.NET Solutions using the Web Application Project Templates, which compiles the code down
to .dlls.
A Web Site project does not compile the code, but simply uses the .vb files and they have to be migrated to the server with the .aspx files. http://msdn.microsoft.com/en-us/library/dd547590%28v=vs.110%29.aspx
Currently the only way I can debug this Solution is to attach to the w3wp.exe process running locally on my work station.
The Solution is comprised of two Web Sites, which I cannot get it to compile because of the following errors -
'webServerControlName' is not a member of '(Protected Code Behind Class Name)' I am reaching out to the MSDN community to see if anyone has experienced this issue with
Web Site Projects.
I hope that clears up the Project Type question.
Moojjoo MCP, MCTS
MCP Virtual Business Card
http://moojjoo.blogspot.com -
Getting error message Cannot Resolve Symbol when trying to compile a class
Hello All -
I am getting an error message cannot resolve symbol while trying to compile a java class that calls another java class in the same package. The called class compiles fine, but the calling class generates
the following error message:
D:\Apache Tomcat 4.0\webapps\examples\WEB-INF\classes\cal>javac
ConnectionPool.java
ConnectionPool.java:158: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
private void addConnection(PooledConnection value) {
^
ConnectionPool.java:144: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
PooledConnection pcon = new PooledConnection(con);
^
ConnectionPool.java:144: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
PooledConnection pcon = new PooledConnection(con);
The code is listed as follows for PooledConnection.java (it compiles fine)
package cal;
import java.sql.*;
public class PooledConnection {
// Real JDBC Connection
private Connection connection = null;
// boolean flag used to determine if connection is in use
private boolean inuse = false;
// Constructor that takes the passed in JDBC Connection
// and stores it in the connection attribute.
public PooledConnection(Connection value) {
if ( value != null ) {
connection = value;
// Returns a reference to the JDBC Connection
public Connection getConnection() {
// get the JDBC Connection
return connection;
// Set the status of the PooledConnection.
public void setInUse(boolean value) {
inuse = value;
// Returns the current status of the PooledConnection.
public boolean inUse() {
return inuse;
// Close the real JDBC Connection
public void close() {
try {
connection.close();
catch (SQLException sqle) {
System.err.println(sqle.getMessage());
Now the code for ConnectionPool.java class that gives the cannot
resolve symbol error
package cal;
import java.sql.*;
import java.util.*;
public class ConnectionPool {
// JDBC Driver Name
private String driver = null;
// URL of database
private String url = null;
// Initial number of connections.
private int size = 0;
// Username
private String username = new String("");
// Password
private String password = new String("");
// Vector of JDBC Connections
private Vector pool = null;
public ConnectionPool() {
// Set the value of the JDBC Driver
public void setDriver(String value) {
if ( value != null ) {
driver = value;
// Get the value of the JDBC Driver
public String getDriver() {
return driver;
// Set the URL Pointing to the Datasource
public void setURL(String value ) {
if ( value != null ) {
url = value;
// Get the URL Pointing to the Datasource
public String getURL() {
return url;
// Set the initial number of connections
public void setSize(int value) {
if ( value > 1 ) {
size = value;
// Get the initial number of connections
public int getSize() {
return size;
// Set the username
public void setUsername(String value) {
if ( value != null ) {
username = value;
// Get the username
public String getUserName() {
return username;
// Set the password
public void setPassword(String value) {
if ( value != null ) {
password = value;
// Get the password
public String getPassword() {
return password;
// Creates and returns a connection
private Connection createConnection() throws Exception {
Connection con = null;
// Create a Connection
con = DriverManager.getConnection(url,
username, password);
return con;
// Initialize the pool
public synchronized void initializePool() throws Exception {
// Check our initial values
if ( driver == null ) {
throw new Exception("No Driver Name Specified!");
if ( url == null ) {
throw new Exception("No URL Specified!");
if ( size < 1 ) {
throw new Exception("Pool size is less than 1!");
// Create the Connections
try {
// Load the Driver class file
Class.forName(driver);
// Create Connections based on the size member
for ( int x = 0; x < size; x++ ) {
Connection con = createConnection();
if ( con != null ) {
// Create a PooledConnection to encapsulate the
// real JDBC Connection
PooledConnection pcon = new PooledConnection(con);
// Add the Connection to the pool.
addConnection(pcon);
catch (Exception e) {
System.err.println(e.getMessage());
throw new Exception(e.getMessage());
// Adds the PooledConnection to the pool
private void addConnection(PooledConnection value) {
// If the pool is null, create a new vector
// with the initial size of "size"
if ( pool == null ) {
pool = new Vector(size);
// Add the PooledConnection Object to the vector
pool.addElement(value);
public synchronized void releaseConnection(Connection con) {
// find the PooledConnection Object
for ( int x = 0; x < pool.size(); x++ ) {
PooledConnection pcon =
(PooledConnection)pool.elementAt(x);
// Check for correct Connection
if ( pcon.getConnection() == con ) {
System.err.println("Releasing Connection " + x);
// Set its inuse attribute to false, which
// releases it for use
pcon.setInUse(false);
break;
// Find an available connection
public synchronized Connection getConnection()
throws Exception {
PooledConnection pcon = null;
// find a connection not in use
for ( int x = 0; x < pool.size(); x++ ) {
pcon = (PooledConnection)pool.elementAt(x);
// Check to see if the Connection is in use
if ( pcon.inUse() == false ) {
// Mark it as in use
pcon.setInUse(true);
// return the JDBC Connection stored in the
// PooledConnection object
return pcon.getConnection();
// Could not find a free connection,
// create and add a new one
try {
// Create a new JDBC Connection
Connection con = createConnection();
// Create a new PooledConnection, passing it the JDBC
// Connection
pcon = new PooledConnection(con);
// Mark the connection as in use
pcon.setInUse(true);
// Add the new PooledConnection object to the pool
pool.addElement(pcon);
catch (Exception e) {
System.err.println(e.getMessage());
throw new Exception(e.getMessage());
// return the new Connection
return pcon.getConnection();
// When shutting down the pool, you need to first empty it.
public synchronized void emptyPool() {
// Iterate over the entire pool closing the
// JDBC Connections.
for ( int x = 0; x < pool.size(); x++ ) {
System.err.println("Closing JDBC Connection " + x);
PooledConnection pcon =
(PooledConnection)pool.elementAt(x);
// If the PooledConnection is not in use, close it
if ( pcon.inUse() == false ) {
pcon.close();
else {
// If it is still in use, sleep for 30 seconds and
// force close.
try {
java.lang.Thread.sleep(30000);
pcon.close();
catch (InterruptedException ie) {
System.err.println(ie.getMessage());
I am using Sun JDK Version 1.3.0_02" and Apache/Tomcat 4.0. Both the calling and the called class are in the same directory.
Any help would be greatly appreciated.
tnx..
addiIs ConnectionPool in this "cal" package as well as PooledConnection? From the directory you are compiling from it appears that it is. If it is, then you are compiling it incorrectly. To compile ConnectionPool (and PooledConnection similarly), you must change the current directory to the one that contains cal and type
javac cal/ConnectionPool. -
Missing method body and cannot resolve symbol
I keep getting these two errors when trying to compile. I know that I need to call my fibonacci and factorial functions from the main function. Is this why I am getting the missing method body error? How do I correct this?
Am I getting the cannot resolve symbol because I have to set the num and fact to equal something?
Thanks
public class Firstassignment
public static void main(String[]args)
System.out.println();
public static void fibonacci(String[]args);
int even=1;
int odd=1;
while (odd<=100);
System.out.println(even);
int temp = even;
even = odd;
odd = odd + temp;
public static void factorial (String[]args);
for (int count=1;
count<=num;
count++);
fact = fact * count;
outputbox.printLine("Factorial of" + num + "is" + fact);Hey... :o)
the problem is that you've put semicolons at the end of the function signature, like this:
public static void fibonacci(String[]args);
}that should happen only when the function is abstract... so ur function should actually look like this:
public static void fibonacci(String[]args)
}also, i think you've missed out on the declarations (like what are fact and num??).... -
"cannot resolve symbol" in a Timer !!!Please Help!!!
I am doing a program for a class which involves timers. I am using JCreator and when i try to construct a new timer, the compiler points to the "new" in the line:
Timer T1=new Timer(interval, ActionListener);
^
This is what it looks like and the error reads: cannot resolve symbol; constructor Timer.
please tell me if yiou have any information or suggestions as to how this error might be remedied.Sure, here it is:
import java.awt.event.*;
import javax.swing.Timer;
import javax.swing.JOptionPane;
import java.util.*;
interface ActionListener
void actionPerformed(ActionEvent event);
class Ploid
public static void main(String[] args)
class Car implements ActionListener
int mpg=30;
int mph=35;
int gtank=20;
int interval;
int changer;
int totalmiles;
Car(int x)
interval=x;
public void actionPerformed(ActionEvent event)
for(int c=0;c<(interval/1000);c++)
totalmiles=totalmiles+mph;
int hyt=mpg*gtank;
if(totalmiles>hyt)
int y=totalmiles-hyt;
totalmiles=totalmiles-y;
System.out.println(totalmiles);
else
System.out.println(totalmiles);
class SUV implements ActionListener
int mpg=15;
int mph=55;
int gtank=30;
int interval;
int changer;
int totalmiles;
SUV(int x)
interval=x;
public void actionPerformed(ActionEvent event)
for(int c=0;c<(interval/1000);c++)
totalmiles=totalmiles+mph;
int hyt=mpg*gtank;
if(totalmiles>hyt)
int y=totalmiles-hyt;
totalmiles=totalmiles-y;
System.out.println(totalmiles);
else
System.out.println(totalmiles);
class Semi implements ActionListener
int mpg=60;
int mph=80;
int gtank=50;
int interval;
int changer;
int totalmiles;
Semi(int x)
interval=x;
public void actionPerformed(ActionEvent event)
for(int c=0;c<(interval/1000);c++)
totalmiles=totalmiles+mph;
int hyt=mpg*gtank;
if(totalmiles>hyt)
int y=totalmiles-hyt;
totalmiles=totalmiles-y;
System.out.println(totalmiles);
else
System.out.println(totalmiles);
String flag="y";
String trav=JOptionPane.showInputDialog("How long do you want to drive?(1000=1 hour)");
int t1=Integer.parseInt(trav);
Car listen=new Car(t1);
SUV listener2=new SUV(t1);
Semi listener3=new Semi(t1);
final int t2=t1/1000;
final int t3=t1/t2;
ActionListener listener=null;
Timer T1=new Timer(t3, listener);
Timer T2=new Timer(t3, listener);
Timer T3=new Timer(t3, listener);
while(flag.equals("y"))
T1.start();
T2.start();
T3.start();
String g=JOptionPane.showInputDialog("Do you want to drive again?");
if((g.equals("y"))||(g.equals("Y")))
System.out.println("Let's Drive!");
else
flag=g;
System.exit(0);
}Here is the errors:
[errors]
A:\Ploid2.java:116: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
Timer T1=new Timer(t3, listener);
^
A:\Ploid2.java:117: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
Timer T2=new Timer(t3, listener);
^
A:\Ploid2.java:118: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
Timer T3=new Timer(t3, listener);
^
3 errors
Process completed.
[errors]
****There is the source code and the errors the compiler returns. That should be more help.**** -
Recieving cannot resolve symbol symbol : class Serializable
I'm receiving the error:
cannot resolve symbol symbol : class Serializable
The class is as follows:
//package cscie160.hw5;
import java.io.Serializable
* @author Eddie Brodie
* @version %I%, %G%
public class AccountInfo implements Serializable
public int _accountNumber;
public int _pin;
public AccountInfo(int accountNumber, int pin)
_accountNumber = accountNumber;
_pin = pin;
I've tried importing java.*
I've also checked my classpath.
Any ideas?Try taking the import statement out of the comment block; that might help
-
Cannot resolve symbol: class OracleDriver
Attempting to compile a servlet on Apache Server using same jdeveloper jdbc libraries:
classes12.jar & nls_charset12.jar
Error message:
$compilejava2.sh ProdJobs
ProdJobs.java:361: cannot resolve symbol
symbol : class OracleDriver
location: package driver
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Am I missing something else?
JeffreyEnter this code into your program and then put the Oracle jar file that contains the driver in your run-time classpath.
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
catch(ClassNotFoundException cnfe) {
// driver not found
}The effect of this is that the classloader will load the Oracle driver for you then call it's static initiailizer that does a bunch of magic that results in the Java runtime knowing that there's a JDBC driver out there.
It is a little weird - but that's the way it works. -
Cannot resolve symbol: class EJBObject
Using javac I get this compile error on this file Calculator.java
Calculator.java:1: cannot resolve symbol
symbol : class EJBObject
location: package ejb
import javax.ejb.EJBObject;
^
Calculator.java:5: cannot resolve symbol
symbol : class EJBObject
location: interface Calculator
public interface Calculator extends EJBObject {
Source code for Calculator.java
import javax.ejb.EJBObject;
import java.rmi.*;
public interface Calculator extends EJBObject {
public long add (int x, int y) throws RemoteException;
public long subtract (int x, int y) throws RemoteException;This code is from a book, so I will assume its a classpath problem. My
classpath looks like:
"C\QTJava.zip".;%J2EE_HOME%\lib\j2ee.jar;%J2EE_HOME%\lib\locale
Also the following enviorment varibales have been set to:
J2EE_HOME
C:\Development\Java\j2sdkee1.3.1
JAVA_HOME
C:\Development\Java\jdk1.3.1
Path
%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\Common Files\Adaptec Shared\System;%JAVA_HOME%\bin;%J2EE_HOME%\bin
I can run j2EE, like "j2EE -verbose" (no problems)
also run cloudscape, like "cloudscape -start" (no problems)
also can run deploytool, like "deploytool" (no problems, & deploy sample ear files from cd book)
Your help is appreicated.
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