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but that s our homework.i made the changes in the second program but i want to make sure i got em right

but we haven t learn how to make programs in class!all we had to do is switch the classes etc to match the starting one(the first i provided).i did it but i don t know if i put them correctly in the...

yes i agree but this is not a complete program.its parts of a program that we don t have that s why i posted it here cause its harder to fix it and i needed all the help i could get!

the problem is that i don t know if i replaced the names in the second code correctly according to the ones he gave us in the first code
let me explain
he gave us all the names in the first code i...

i m not supposed to compile it and execute.i had a paper where i was asked to find on the web or think on my own a code for search and insert a key in the 234 tree(i study math so he doesn t really...

hello everyone i got this assignment.We have this piece of code and we must make a search for a key.if the key exist it returns true if not false.Plus we must insert a key in the class.if it is...

hey guys i m having a problem with infix and prefix
here is the code

import java.util.StringTokenizer;
import static java.lang.Math.pow;
import java.util.Stack;

public class Calculator {
...

i tried to compiled it again and now it says provided class name is invalid.how did this happen?are online compilers trustworthy?

scanner class is more preferable.no need for joptionpane
as for the string it will be something like something like
system.out.println("give numbers");
String input = scan.nextLine();...

yes now i have another question if you don t mind!i have a code for an infix post fix and evaluation as a calculator
here is the code.it compiles its ok

// Stack for numbers: 'values'
...

ah yeah i understand what u meant!thanx!sorry but i m really dizzy and english is not my main language!

i added these at the start
import java.util.StringTokenizer;
import java.util.Stack;
forgot to paste them.now it compiles

i copied paste it wrong from my wordpad!sorry but i m very tired i ve trying this thing for hours.now i think i pasted right!

ok guys so i changed the code and i compiled and didn t find any mistakes.but when i run it it shows me this ( i try to run it in an online compiler site )
Compiling the source code....
$javac...

yeah my bad i did it right this time and it shows me
constructor Arithmetic in class stackscalc.Arithmetic cannot be applied to given types;
required: java.lang.String
found: no arguments
...

i added this part
public static void main (String[] args)
{
Arithemtic calculator = new Arithmetic();
calculator.isBalance();
}
but it says class, interface, or enum expected...

yes guys i m sorry you are right.i have a class and our instructor after like 30-40 hours of java wanted us to make a calculator using 2 stacks and i struggle to make it.i m newbie to java.he doesn t...

oh sorry its just that i have to give this assignment in 10 days and i m kinda nervous!i fixed though thank you!
any suggestions guys?it gives me error and i don t know what i did wrong

hey guys i got a problem with this program.I m supposed to make a calculator using stacks but it seems that i m stack. i can t get the right recognition for () and {} []
any tips?
its not necessary...