Need help with class I'm trying to write for school
Hi,I'm taking my first Java class, and we're learning how to write classes. I've got MOST of the program and class to work, but I'm still having trouble with it.
In the class I wrote, if I delete the "getWindTempF(strAlt)" the program runs fine, other than not doing the conversion to Fahrenheit. So, I'm guessing that there's a problem with my getWindTempF method. However, it is almost exactly a duplicate of my getWindTempC method, so I can't figure out what I'm doing wrong. The errors I get when I keep the "getWindTempF(strAlt)" in the prtWindInfo method are:
java.lang.NumberFormatException: For input string: " "
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:426)
at java.lang.Integer.parseInt(Integer.java:476)
at NWSFD.getWindTempF(NWSFD.java:94)
at NWSFD.prtWindInfo(NWSFD.java:162)
at a19004.main(a19004.java:30)
Exception in thread "main"
----jGRASP wedge2: exit code for process is 1.
Again, the program and class work perfectly except for the getWindTempF. Any ideas would be greatly appreciated, and sorry for such a long post
Here is the main program:
import cs1.Keyboard;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.text.DateFormat;
import java.util.Date;
public class a19004
// Instantiates the windsAloft object by using the NWSFD class
public static void main (String[] args)
final String FAA_FD="SAN 1405 2908+26 2911+19 2809+11 1307-09 0308-20 " +
"032433 012543 352853";
NWSFD windsAloft = new NWSFD(FAA_FD); //Instantiate the NWSFD object
System.out.println ("Winds Aloft");
System.out.println ("as of " + windsAloft.getDate());
System.out.println ("");
System.out.println ("STA Alt Dir Speed TempC TempF");
System.out.println ("");
System.out.println (windsAloft.prtWindInfo("03"));
System.out.println (windsAloft.prtWindInfo("06"));
System.out.println (windsAloft.prtWindInfo("09"));
System.out.println (windsAloft.prtWindInfo("12"));
System.out.println (windsAloft.prtWindInfo("18"));
System.out.println (windsAloft.prtWindInfo("24"));
System.out.println (windsAloft.prtWindInfo("30"));
System.out.println (windsAloft.prtWindInfo("34"));
System.out.println (windsAloft.prtWindInfo("39"));
And for the sake of brevity, just a part of the NWSFD class:
import java.text.*;
import java.util.Date;
public class NWSFD
// Set up variables
private String strWea;
// 3.a. Constructor
public NWSFD (String strVar)
strWea=strVar + " ";
// 3.d.
public String getWindTempC (String strAlt)
String strVar;
strVar = strWea.substring(getPos(strAlt) + 4, getPos(strAlt) + 7);
if (strAlt.equals("03"))
strVar = strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 5);
if (strAlt.equals("30"))
strVar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strAlt.equals("34"))
strVar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strAlt.equals("39"))
strVar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strVar.equals(" "))
strVar = "N/A";
return strVar;
// 3.ed.
public String getWindTempF (String strAlt)
String strVar;
String strFar;
int intRet;
int intFar;
strFar = strWea.substring(getPos(strAlt) + 5, getPos(strAlt) + 7);
if (strAlt.equals("03"))
strFar = strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 5);
if (strAlt.equals("30"))
strFar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strAlt.equals("34"))
strFar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strAlt.equals("39"))
strFar = "-" + strWea.substring(getPos(strAlt) +4, getPos(strAlt) + 6);
if (strFar.equals(" "))
strVar = "N/A";
intRet = Integer.parseInt(strFar);
intFar = intRet * (9/5) + 32;
strVar = Integer.toString(intRet++);
return strVar;
// 3.h.
public String prtWindInfo (String strAlt)
String strRet;
strRet = strWea.substring(0,3) + " " + strAlt + "000" + " " +
getWindDir(strAlt) + " " + getWindSpeed(strAlt) + " " +
getWindTempC(strAlt) + "C " + getWindTempF(strAlt) + "F";
return strRet;
}
Thank you for the reply, soni29. here is the code:
public int getPos(String strAlt)
int intAlt;
int intRet;
intAlt = Integer.parseInt(strAlt);
switch (intAlt)
case 3:
intRet = 4;
break;
case 6:
intRet = 9;
break;
case 9:
intRet = 17;
break;
case 12:
intRet = 25;
break;
case 18:
intRet = 33;
break;
case 24:
intRet = 41;
break;
case 30:
intRet = 49;
break;
case 34:
intRet = 56;
break;
default:
intRet = 63;
} // Close switch
return intRet;
However, I really don't think there's a problem with any of the coding there. The only times I have problems with the program is when I'm trying to display the data from getWindTempF. If I omit that method, the program works perfectly. Basically, what the program is supposed to do, is hand a string (FAA_FD) to the NWSFD class, which then extracts data from it. Thank you again for the help...any other advice?
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Any tips for helping me out?System.out.println("Part number:
"+invoice1.getPartNumber;
The + sign will concatenate invoice1.getPartNumber()
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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
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^
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
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^
InvoiceTest.java:20: cannot find symbol
symbol : method println(java.lang.String,double)
location: class java.io.PrintStream
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^
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location: class Invoice
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^
InvoiceTest.java:30: operator + cannot be applied to java.lang.String
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^
InvoiceTest.java:31: cannot find symbol
symbol : method getPartDescription()
location: class Invoice
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^
InvoiceTest.java:31: cannot find symbol
symbol : method println(java.lang.String,int)
location: class java.io.PrintStream
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^
InvoiceTest.java:32: cannot find symbol
symbol : method getQuantity()
location: class Invoice
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^
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 -
Need help with classes in Applets and drawing buildings.
I'm trying to create an Applet that draws a starfield (I got that right) and then searches for any parameters in the Applet tag. The Applet then draws as many buldings as there are parameters in the Applet tag, and uses the number in the parameter as the height. I have it working OK, but it won't draw the buildings. Here is me code:
import java.applet.Applet;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
public class Skyline extends Applet {
public void init() {
setBackground(Color.black);
public void paint(Graphics g) {
Graphics2D pen = (Graphics2D) g;
Random generator = new Random();
Stars starField = new Stars();
starField.drawStars(pen, getWidth(), getHeight());
int n = 1;
String param = null;
while((param = getParameter("param" + n)) != null) {
n++;
int startX = 0;
int startY = getHeight();
int height = 0;
int width = getWidth() / (n + 2);
Building structure = new Building();
structure.drawBuilding(pen, height, width, startX, startY, n);
class Stars {
public void drawStars(Graphics2D pen, int Width, int Height) {
Random generator = new Random();
int runs = 1;
while (runs <= 1000) {
int Xcord = generator.nextInt(Width - 3);
int Ycord = generator.nextInt(Height - 3);
Ellipse2D.Double star
= new Ellipse2D.Double(Xcord, Ycord, 3, 3);
pen.setColor(Color.white);
pen.fill(star);
runs++;
class Building {
public void drawBuilding(Graphics2D pen, int height, int width, int startX, int startY, int n) {
Random generator = new Random();
int n2 = 1;
int runs = 1;
String input = "";
int red = generator.nextInt(100),
green = generator.nextInt(100),
blue = generator.nextInt(100);
pen.setColor(new Color(red, green, blue));
while (runs <= n) {
input = getParameter("building" + n2);
height = Integer.parseInt(input);
height = startY - height;
Rectangle building = new Rectangle(startX, startY, height, width);
pen.fill(building);
startY = startY + width;
n2++;
runs++;
Can anyone help me?That didn't work, so I looked at the code again and found some errors. I decided to rewrite it, here is the updated code...
import java.applet.Applet;
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
public class Skyline extends Applet {
public void init() {
setBackground(Color.black);
public void paint(Graphics g) {
Graphics2D pen = (Graphics2D) g;
Random generator = new Random();
Stars starField = new Stars();
starField.drawStars(pen, getWidth(), getHeight());
Building structure = new Building();
structure.drawBuilding(pen);
class Stars {
public void drawStars(Graphics2D pen, int Width, int Height) {
Random generator = new Random();
int runs = 1;
while (runs <= 1000) {
int Xcord = generator.nextInt(Width - 3);
int Ycord = generator.nextInt(Height - 3);
Ellipse2D.Double star
= new Ellipse2D.Double(Xcord, Ycord, 3, 3);
pen.setColor(Color.white);
pen.fill(star);
runs++;
class Building {
public void drawBuilding(Graphics2D pen) {
Random generator = new Random();
int n = 1;
int n2 = 1;
int runs = 1;
String input = "";
String param = "";
while ((param = getParameter("building" + n)) != null) {
n++;
int height = getHeight();
int width = getWidth();
int startX = 0;
int startY = height;
int red = generator.nextInt(100),
green = generator.nextInt(100),
blue = generator.nextInt(100);
pen.setColor(new Color(red, green, blue));
while (runs <= n) {
height = getHeight();
input = getParameter("building" + n2);
height = Integer.parseInt(input);
height = startY - height;
Rectangle building = new Rectangle(startY, startX, height, width);
pen.fill(building);
startX = startX + width;
n2++;
runs++;
I can get it to draw one large black building, but that's it. -
Need help with Class-Path and NCDFE
This isn't a new issue, but I'm getting a variation of a problem a lot of people seem to have had. I was hoping someone out there can help me out.
I have a jar file (imex.jar) sitting in c:\temp\imextest. I also have another jar file, commons-cli-1.0.jar sitting in c:\temp\imextest\lib.
I want to run the jar in a standalone manner. My manifest has the following entries.
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.5.3
Created-By: 1.4.2_01-b06 (Sun Microsystems Inc.)
Main-Class: com.foo.imex.DirectoryImportExport
Class-Path: lib/commons-cli-1.0.jar
I am invoking it using the following command (from c:\temp\imextest)
java -jar imex.jar -i -f c:\matt\RRBus\jiyun.xml -v
I get this result:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException
It seems to me that I have my directory structure and manifest set up correctly, but maybe I don't (as it's not working). Does anyone see what I'm doing wrong here? (the "missing" class is in commons-cli-1.0.jar).
Thanks,
Mattperhaps jar file needed for parsing is not there in classpath...set it...in the classpath..
-
Need help with "class file contains wrong class"
I have a dbUtil package as
package dbUtil;
public class dbConfig {
public String getHost(String db) {
This file called dbConfig.java has been compiled with -d option and rthe class files resides in dir <install_dir>/webapps/test/WEB-INF/classes/eb/dbUtil/
I have a jsp file in <install_dir>/webapps/test/test.jsp which imports the dbUtil package
<%@ page import="eb.dbUtil.dbConfig" %>
and I am getting this error:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
/opt/hpws/tomcat/work/Standalone/localhost/test/test_jsp.java:12: cannot access eb.dbUtil.dbConfig
bad class file: /opt/hpws/tomcat/webapps/test/WEB-INF/classes/eb/dbUtil/dbConfig.class
class file contains wrong class: dbUtil.dbConfig
Please remove or make sure it appears in the correct subdirectory of the classpath.
import eb.dbUtil.dbConfig;
^
1 error
Can anyone tell me what am I doing wrong? I am using tomcat 4.1
Thanks!
L.Given your java file, the fully qualified name of the class is dbUtil.dbConfig.
What you are importing is eb.dbUtil.dbConfig
These things are not the same.
The root of the classpath for the webapp is the classes directory.
So either
1 - specify dbConfig.java to be in package eb.dbUtil
2 - move the class file into web-inf/classes/dbUtil/dbConfig.class, and import dbUtil.dbConfig.
Also, by convention, classnames should start with a capital letter ie dbUtil.DbConfig.
Cheers,
evnafets -
Need help with my Toshiba remote control and receiver for Qosmio G30 161
Hello to all
I have a Toshiba Qosmio G30-161 and with it I have a Toshiba remote control and a Toshiba remote control receiver, this is the first time I have used it (tried to that is), my problem is the remote is not working on the computer when I press any program buttons the computer does nothing.
I have installed four brand new AA batteries and the remote works fine its sending signals to the receiver, the receiver the detecting the remote as a red light appears every time you press a button and as for the computer I have checked the drivers and the USB is picking up the receiver as a E-home remote receiver which I have checked with Toshiba and that is correct, so all in all the remote is working, the receiver is picking up signals and the pc has detected the receiver but nothing works, I have installed remote control manager but this still has done anything. I have spoken to Toshiba help and support and the end result is they are not sure what the problem is. Can anyone help I require the remote for slideshows for customers as I??m a photographer.
Also to confirm I am running Windows XP MCE addition.
Anthony WorlockHi there,
this remote contol works, if you use it without any special drivers and special software, only in the Media Center.
But if you install such stuff like [WinLirc|winlirc.sourceforge.net] then you should be able to get some functions for your presentation.
Please try this tool and check if it works.
By the way: If I were you I would first read the Manual and FAQ of WinLirc before starting because its a little bit tricky to handle the program. :) (Too many settings :D)
Greets -
Desperately need help with a networked printer and SMB sharing for windows
Complete xServ newbie here. I'm a windows/novell admin, with limited experience in Unix and Linux.
Against my advice, a client of mine that owns a small office of 20 people bought an XServG5 to act as a server for 20 mixed Windows PCs. File sharing services are working fine. I've created the users, set up groups and rights - that's all good.
I cannot get an SMB shared printer to work from the windows machines. They run through the network printer install just fine, it shows up online, etc. However, when print jobs are submitted they DO show up in the printer queue on the server, sit there for a while, and then get moved to the completed box.
They never print. There's not any indication that the job is even submitted to the printer. I can print to the printer just fine from the server itself, but the windows clients don't work, but they don't return an error message.
Print services are running on the server, I've configured the printer name to be less than 12 characters for the share, and indeed it does pop right up during the "add network printer" routine.
Ideas? I'm not even sure what questions I'm supposed to be asking, such is my ignorance of the OS. I do know that I followed the documentation to a T, and according to Apple this should work.
Thanks in advance for the help. I'm extremely frustrated.We have the same problem. Our printer worked for about 2 years but failed similar to yours after a system update.
Can you go into the Windows service, Logs, Printer Service. Copy and paste the log here. What I am looking for is a line like lpr: CANNOTCONNECTCLIENT or something similar to this.
What I expect is that you have a problem where the cups defined printer is not usable. We can't get our problem fixed either - but am just curious if you have the same thing. We reloaded our server, applied all of the update and still cannot get it to work.
Again, I think it stems from the update. -
Need help with 3 way call to a 1 for English or 2 ...
I can do a 3 way with Skype, but the recording I need to have my client listen to is telling me to push 1 for English or 2 for Spanish. Can you tell me how to do this?
Do you want to set up auto attandant service based on Skype? if so, you can try PrettyMay Call Center for Skype which can be used easily.
check out more at: http://www.prettymay.net
Want to record Skype calls, check out at:
hereandhere -
Need help with a lookup on a IDoc element for BPM
Hello All,
I was wondering if there is someway that I can lookup on the <b>E1EDKA1</b>segment and get the value of <b>NAME1</b> where the value of <b>PARVW = LF</b> in BPM. I appreciate any help.
Thanks
Message was edited by:
Balu YalamanchiliHI,
To get value of element/container variable , you cna use first context object, based on context object put switch (aslo some block/fork step ) with condition , stating that if that value of context element is matched then put control step to raise alert.
i think you got this ,if not please let me know to explain clearly.
Any way please see some links regarding alert..
/people/krishna.moorthyp/blog/2006/04/08/reconciliation-of-messages-in-bpm
/people/michal.krawczyk2/blog/2005/11/10/xi-the-same-filename-from-a-sender-to-a-receiver-file-adapter--sp14
Regards
Chilla..
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