Pascal to Java Please help me!

I am truobled in creating a validation method for the user loging in....
As I am perfect at Pascal can anyone translate the following pascla code to Java Please help me with this.
PROGRAM USERLOGIN;
TYPE
USER_TYPE = RECORD
    USERNAME : STRING[15];
    PASSWORD : STRING[15];
END;
    USFILE = FILE OF USER_TYPE;
VAR
   USER: USER_TYPE;
   CKUSER: USER_TYPE;
   RECFILE : USFILE;
   I,J     : INTEGER;
BEGIN
WRITE('ENTER USERNAME:');READLN(CKUSER.USERNAME);
WRITE('ENTER PASSWORD:');READLN(CKUSER.PASSWORD);
FILESPEC :='USERFILE.USR';
ASSIGN(RECFILE, FILESPEC);
RESET(RECFILE);
WHILE NOT EOF(RECFILE) DO
   BEGIN
     READ(RECFILE, USER);
     IF CKUSER.USERNAME = USER.USERNAME AND CKUSER.PASSWORD = USER.PASSWORD THEN
          LOGIN
    ELSE
          WRITE('USER NOT FOUND');
   END;
END.Thank you

Don't bother:
http://forum.java.sun.com/thread.jsp?forum=54&thread=539277

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// ^ ^
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Ok here is the working code as one long function:
// ^ ^
// (0)(0) A Happy Piggy Application
// Problems: 2.6,2.8,2.9,2.12 (oo)
// An application finds the total number of hours, minutes, & seconds, finds the distance
// between two points, finds the volume and surface area of a sphere, and adds up the change
// in a jar. First, the total hours, minutes, and seconds problem.
import java.io.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class twoptsix
    static BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
    static PrintWriter screen = new PrintWriter(System.out, true);
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double hoursa, minutesa, secondsa;
String hours;
System.out.print ("Please enter a number of hours: ");
hours = keyboard.readLine();
hoursa = Double.parseDouble(hours); //asks programmer friendly user to enter hours
String minutes;
System.out.print ("Please enter a number of minutes: ");
minutes=keyboard.readLine();
minutesa = Double.parseDouble(minutes); //asks programmer friendly user to enter minutes
String seconds;
System.out.print ("Pretty please enter a number of seconds: ");
seconds = keyboard.readLine();
secondsa = Double.parseDouble(seconds); //asks programmer friendly user to enter seconds
double allseconds;
allseconds = (hoursa * 3600) + (minutesa * 60) + secondsa; //adds up all the seconds of the time entered
System.out.println ("You have: " + hours + " hours..."); //displays hours
System.out.println ("" + minutes + " minutes..."); //displays minutes
System.out.println ("and " + seconds + " seconds..."); //displays seconds
System.out.println ("to get whatever you need to done!"); //witty attempt at humor
System.out.println ("The total amount of seconds is: " + allseconds + " seconds."); //displays total seconds
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// { <-- other function used to start here, but now it continues
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String xa;
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xa = keyboard.readLine();
x1 = Double.parseDouble(xa); //asks programmer friendly user to enter first x value
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System.out.print ("...also need the 'y' coordinate of first point: ");
ya = keyboard.readLine();
y1= Double.parseDouble(ya); //asks programmer friendly user to enter first y value
String xb;
System.out.print ("...and the 'x' coordinate of the second point: ");
xb = keyboard.readLine();
x2 = Double.parseDouble(xb); //asks programmer friendly user to enter second x value
String yb;
System.out.print ("...don't forget the 'y' coordinate of the second point: ");
yb = keyboard.readLine();
y2 = Double.parseDouble(yb); //asks programmer friendly user to enter second y value
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distance = Math.sqrt(total); //finds the square root of the sum of the differences of the values
System.out.print ("E=mc^2...oh and,");
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//second function used to end here...
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System.out.print("Please enter the radius of a sphere: ");
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// } <----- COMMENTED OUT FOR THE SAME REASON
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//{ <----AND ANOTHER
int pennies, nickels, dimes, quarters;
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screen.println("Empty your piggy bank and count the change, how many quarters ya have?: ");
int q = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of quarters
screen.println("How many dimes?: ");
int d = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of dimes
screen.println("How many nickels?: ");
int n = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of nickels
screen.println("How many pennies?: ");
int p = (new Integer(keyboard.readLine())).intValue();//asks programmer friendly user to enter a number of pennies
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money1 = (.25 * q) + (.1 * d) + (.05 * n) + (.01 * p);
screen.println("You're rich! Total, you've got: " + money.format(money1));//finds and displays total money
}P.S. To make the code formatted better put [ code ] before and [ /code ] after. It's not perfect, but a little better...

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1. How <b>Encapsulation</b> works in Java? Why is it needed? What benefits can be given from encapsulation? Can give some examples for me to know more?
2. How <b>Overloading</b> works in Java? Why is it needed? What benefits can be given from it in the extensibility of programs? Can give some examples for me to know more?
3. How <b>inheritance</b> works in Java? What benefits can be given from inheritance? Can give further explanation, such as class hierarchy for me to know more?
4. What is <i>object class</i> and <i>object distances</i> ? What is their differences?
5. What is <b>Reusability</b>? What benefits can it gives? Why it is needed? Can give me further examples?
Thanks for help very much

Maybe I'm not getting this, but you want one of us to give you a nice short answer convenient enough for you to copy down, right? Well, there aren't many people here that are willing to do that. There are many people who won't even bother answering homework questions. I don't mind, but you need to show us some work you've done, like the previous poster said. The effort has to come from you, not us. If you are learning Java, you must put some effort into it.
How can you get an answer out of us?
Example: I understand that inheritance is ..............., but I'm not sure about this part.............. Can anyone provide some clarification please?
Anyway, this question has been crossposted on at least 5 forums already, which I'm sure is one of the reasons people aren't bothering with this question. Please DO NOT CROSSPOST, it's considered poor forum etiquette.
Please don't take anything that I said negatively, but you have to understand that we are taking our time to respond to your queries, and asking us to provide short answers without doing any work on your part, and crossposting is not going to get you answers out of us.
Cheers

Totally New in Java - Please help!!

Hi Dear all,
l am totally new in Java, and l facing one problem,and really hope can get some help from yours,please!
l need to write this program:
The program should do the following:
1. Input two fields: action (action: add / delete), and account number (any
digit or character)
2. if the action is "add" then the program adds one text line to a text
file.
"New account is <account number>"
3. create the text file if it is not already exist (in c:\)
4. When program runs again with new input values, a new line will be
appended to the same file.
5. if the action is "delete" then the program finds the record and removes
the text line from the file.
My problem is :
l just know that l need to create the user interface first,but l don't know how to go on??
Would you please show me some step how to solve these problem?
Many many thanks!!
BaoBao

I don't know about Swing. I never use it.
The stuff to create and manipulate files is in the java.io package.
You'll probably want to use java.io.FileReader and java.io.FileWriter.
Note that FileWriter has a constructor that lets you append and not overwrite.
I'll start you off with a test.
public class AccountListAddTest() {
public static void main(String[] argv) {
AccountList accts = new AccountList();
accts.add("abcdefg12345"); // arg is a hypothetical account number
}Write an AccountList class that'll work if you compile and run this test. After you run this test for the first time, the file should contain the string
New account is abcdefg12345.
This test assumes that the filename is hardcoded into the AccountList class. To keep it simple, make the add method create a new appending FileWriter each time, write, then close the writer.

Adding binary numbers in java please help!!

Hello all, im a total newbie to java and i need your help urgently, i have two variables
that are integers, that store binary numbers i.e.
int tmpIntOne, tmpIntTwo;
tmpIntOne = 1010;
tmpIntTwo = 1110;
i want to add these numbers together and return a binary result so far when you add them together you get:
2120
however i would like a binary result so that
result = tmpIntOne + tmpIntTwo;
= 11000
Thank you.

Hello all, im a total newbie to java and i need your
help urgently, i have two variables
that are integers, that store binary numbers i.e.
int tmpIntOne, tmpIntTwo;
tmpIntOne = 1010;
tmpIntTwo = 1110;These are not binary numbers. These are decimal numbers whose digits consist of ones and zeros. If you want to interpret the characters "010" as a binary number, then do
int tmp1 = Integer.parseInt("1010", 2);
etc.
i want to add these numbers together
int result = tmp1 + tmp;
and return a
binary result Adding two ints will give an int. Int's are always binary. If you want to display it as a binary String, as opposed to the usual decimal String, then, as suggested, use toBinaryString.

Main method question in java, please help

Guys I have looked all over the internet, and cannot understand any of these questions: I would really appreciate any help on them. The first, and most important thing I would like to know is, what is static: what is a static int, or a static main method? Why is this necessary, and what does it do? Could you please provide an example? Also, why is String[] args necessary within the parameters of the main method? Is this so that it can execute it? Last thing is: objects. Where can I learn about them? I know they are made with the new operator, but don't understand their use? Could you explain why they are useful? Can you give them values? and how do they relate to the dot operator? After these are answered, I will be so happy because I will feel like I actually know a little bit. Right now, I'm just confused... Thank you so, so much in advance!

The first, and most important thing I would like to know is, what is static'static' means that the item concerned is associated with the class itself rather than an instance: so, it is accessible to all instances.
Could you please provide an example?
public static void main(String[] args)is an example, but you knew that. I don't really understand the question.
Also, why is String[] args necessary within the parameters of the main method?'args' receives the arguments you type on the command line after the class name or jar name, depending on how you invoke the application.
This is all covered in the documentation, which you should read before asking further questions.
Last thing is: objects. Where can I learn about them?If you don't know about objects you're not going to learn about them by asking questions on a forum. It's far too large a topic. Get yourself a book.

Can u tell me how to check my computer ip address in java (please help me)

hi to all, can u tell me how to check my computer ip adress in java, what is the command for that

import java.net package in your code.
Then where you need to find the IP, please insert the following code.
InetAddress inAddr = InetAddress.getLocalHost();
String ipAddr = inAddr.getHostAddress();
That should do it.
Best Wishes,
Ramanujam

Developing a shopping cart in java please help

Implement a shopping cart with following features.
1. Create items with required attributes.
2. Define shopping cart parameters
3. define stock values
4. Create an order
5. add to cart
6. Copy cart
7. remove item from cart
8. Check out
9. Print history.

dhaval_shah wrote:
What do you need help with?he's ordering you to do it for him. Not even a "please" to make it sound like a request.
Of course we're not anyone's homework service (though a lot of kids seem to be under the impression that we are) so the kid can expected to be flamed and made fun of (which will likely lead to him getting agressive and abusive, leading to even more fun for us regulars and his eventual bannishment).

New to java, please help me :(

hi, i have to complete a BMI calculator with arrays and switch, i need it so that if input a / b is selected it will calculate metric / imperial (i know that both calcs are the same, its just a placeholder for the time being). once thats selected users are asked to input name, age, height and weight, then looped again for another user to input into the array.
once completed the name and age along with the BMI calculation for all the users that have inputted are displayed
the problem is, the calculations are wrong, where it should be outputting a BMI of between 20-23ish im getting 0.3
i think i had this problem when i done the switch example previously, but to fix that i just lumped all the code (inputs and calcs) into each case. in this method im guessing that would be an incorrect approach ?
btw, sorry for my layout, ive been debugging for ages now and havnt had time to clean it up :/
thank you in advance and heres my code:-
package bmicalculationex;
import javax.swing.*;
public class Main {
public static void main(String[] args) {
String output;
double Hfeet=0, Wstone=0, Hinches=0, Wlbs=0;
String Hfeetstr, Wstonestr, Hinchesstr, Wlbsstr, age;
String name;
double bmiweight=0, bmiheight=0, BMI=0;
Item[] myItemArray = new Item[2];
for(int i = 0;i<2;i++){
myItemArray[i] = new Item();
String input = JOptionPane.showInputDialog(
"Welcome to Chunks BMI calculator\n"+
"a) Metric.\n"+
"b) Imperial\n"+
"q) Quit\n"+
"\nPlease enter letter code" );
char code = input.charAt(0);
switch(code){
case 'a':
output= "Imperial.";
Wlbs = Wlbs * 0.45359237;
Hinches = Hinches * 0.0254;
Hfeet = Hfeet * 0.3048;
Wstone = Wstone * 6.35029318;
break;
case 'b': output= "Metric.";
Wlbs = Wlbs * 0.45359237;
Hinches = Hinches * 0.0254;
Hfeet = Hfeet * 0.3048;
Wstone = Wstone * 6.35029318;
break;
default: output= "Error.";
JOptionPane.showMessageDialog(null,"Invalid Selection.\n"+ "Please try again.");
JOptionPane.showMessageDialog(null, "You have selected :- " + output + "\n\n" +" Thank you.");
//User In-
for(int c=0;c<2;c++){
name = JOptionPane.showInputDialog("enter your name");
age = JOptionPane.showInputDialog("enter your age");
Hfeetstr = JOptionPane.showInputDialog("enter your Height");
Hinchesstr = JOptionPane.showInputDialog("enter the remainder");
Wstonestr = JOptionPane.showInputDialog("enter your weight");
Wlbsstr = JOptionPane.showInputDialog("enter the remainder");
Hfeet = Float.parseFloat(Hfeetstr);
Wstone = Float.parseFloat(Wstonestr);
Hinches = Float.parseFloat(Hinchesstr);
Wlbs = Float.parseFloat(Wlbsstr);
bmiweight = Wstone + Wlbs;
bmiheight = Hinches + Hfeet;
BMI = bmiweight / (bmiheight*bmiheight);
myItemArray[c].setname(name);
myItemArray[c].setyear(age);
myItemArray[c].setBMII(BMI);
String message = "";
for(int n=0;n<2;n++){
message = message + "Name :- " + myItemArray[n].getname() + " " + "Age :- " + " " + myItemArray[n].getaged() + "BMI :- " + " " +myItemArray[n].getBMI() +"\n";
JOptionPane.showMessageDialog(null, message);
}//end of main method
}//end of main class
class Item{
private String namea;
private String agea;
private double BMIa;
public Item(){
agea = "";
BMIa = 0;
namea = "";
public Item(String nameb, String ageb, double BMIb){
namea = nameb;
agea = ageb;
BMIa = BMIb;
public String getname(){
return namea;
public String getaged(){
return agea;
public double getBMI(){
return BMIa;
public String setname (String nameb){
namea = nameb;
return nameb;
public void setyear(String ageb){
agea = ageb;
public void setBMII(double BMIb){
BMIa = BMIb;
}

yush !
i done it :D
i just ended up lumping all the code into each case like i did last time, as when i had the calculations outside of the cases it wasnt taking the values from inside the case. nevermind....
another problem i do have though, i need a loop so that once the program finishes it repeats itself until an X is entered, im not very good with loops :S
i tend to try it like this
quit = 1;
while (quit<2){
then just have one of the cases as quit +1
so in mine it looks liek this:
int quit=1;
while (quit<2){
String input = JOptionPane.showInputDialog(
"Welcome to Chunks BMI calculator\n"+
"a) Metric.\n"+
"b) Imperial\n"+
"q) Quit\n"+
"\nPlease enter letter code" );
char code = input.charAt(0);
switch(code){
case 'a':
JOptionPane.showMessageDialog(null, "You have selected imperial. "+"\n\n" +" Thank you.");
for(int c=0;c<2;c++){
name = JOptionPane.showInputDialog("enter your name");
age = JOptionPane.showInputDialog("enter your age");
Hfeetstr = JOptionPane.showInputDialog("enter your Height in feet");
Hinchesstr = JOptionPane.showInputDialog("enter the remaining inches");
Wstonestr = JOptionPane.showInputDialog("enter your weight in stone");
Wlbsstr = JOptionPane.showInputDialog("enter the remaining lbs");
Hfeet = Float.parseFloat(Hfeetstr);
Wstone = Float.parseFloat(Wstonestr);
Hinches = Float.parseFloat(Hinchesstr);
Wlbs = Float.parseFloat(Wlbsstr);
Wlbs = Wlbs * 0.45359237;
Hinches = Hinches * 0.0254;
Hfeet = Hfeet * 0.3048;
Wstone = Wstone * 6.35029318;
bmiweight = Wstone + Wlbs;
bmiheight = Hinches + Hfeet;
BMI = bmiweight / (bmiheight*bmiheight);
String cat="";
if (BMI <18.5) cat = ("Posh spice");
else if (BMI >= 18.5 && BMI <=25) cat = ("Fit !");
else if (BMI >25 && BMI <=30) cat = ("Fatty !");
else if (BMI >30)cat = ("Super Fatty");
myItemArray[c].setcat(cat);
myItemArray[c].setname(name);
myItemArray[c].setyear(age);
myItemArray[c].setBMII(BMI);
break;
case 'b': output= "Metric.";
etc.....
this is causing me the problems:
for(int i = 0;i<2;i++){
myItemArray[i] = new Item();
says a non static variable cannot be referenced from a static context, i know im being stupid with my implementation, but whats a better way ?
thanks again :)
Edited by: Clunk on Nov 17, 2008 4:05 PM

My first step in Java, please help me.

I've just installed J2SDK1.4.0_03 and I'm reading the first pages of the Java tutorial.
I've created a work folder : C:\Java
I'm working with an msdos session of windows 2000
I've created my first example class, prthello.java with NotePad :
class prthello{
public static void main(String args[]) {
System.out.println("Hello World!");
I've successful compilated it (javac prthello.java) and generated the prthello.class
I've tried to execute it (java prthello) but it doesn't work and i receive the following message :
Exception in thread "main" java.lang.NoClassDefFoundError: prthello
The path should be correct (C:\Programmi\j2sdk1.4.0_03\bin) ,
any suggestions would be appreciate.
Thanking in Advance
Andrea Giussani
Milano, Italy

Thank you for your suggestions, but i have already checked.
The path is ok, i've installed jsdk under folder "programmi" and the path is :
C:\>set path
Path=C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\PROGRA~1\IBM\CLIENT~1;
C:\PROGRA~1\IBM\CLIENT~1\Shared;C:\PROGRA~1\IBM\CLIENT~1\Emulator;C:\Programmi\F
ile comuni\Autodesk Shared\;C:\Programmi\j2sdk1.4.0_03\bin
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH
prthello.java and prthello.class are in the same folder (C:\java) where i executed javac with success and java with the error above mentioned.
Any other suggestions ? Should I reinstall the JSDK ?
Thanking in advance,
Andrea Giussani

Pascal to Java Please help me!

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