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This is the etiquette:
- Post question.
- Wait for answer.
Go off and do some work and maybe later:
- Post question.
- Wait for answer.
Do not flood the forum with one liners that don't actual contain anything that can be resolved.
Panic, Chaos, Destruction.
My work here is done.
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Please show an example, my brain hurts when I try to read invisible code.
Panic, Chaos, Destruction.
My work here is done.
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We had made a JFrame in NetBeans with placing a JTabbedPane in it. There are six tabs with many swing components in it.
Net Beans generated the code automatically in "JFrameClass.java"
That made one class. We changed the components access specifier to public.
Now We made a new class "SetTabPane" extending "JFrameClass.java" using JTabbedPane of class JFrameClass. While running the program it gives an error "java.lang.NullPointerException" on the line accessing the object of JTabbedPane.
Can you help us ???
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No code, no help.
Go help yourself. If you're using Netbeans you can run in debug and find the /bad/ code.
Panic, Chaos, Destruction.
My work here is done.
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I have two Class,two Object,
Example:
Object1 hava 2 fields
mid,imageurl
Object2 hava 3 fields
nid,title,date
how can I receive these object to a XML,and without the id
the root element is <root>,these fields is element
give me a method
thank you.
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Not even a plz! or rgnt!
faholi wrote: give me a method
public String toString()
{
return "foo bar bang bang";
}
There have a method, this one is free. Any more you can either pay for on rentacoder like the rest of the dross, or have a go and then ask for help with code that you can't get to work. When there is not even a single snippet showing what you have tried, you deserve the pit of hell and not anything useful.
Panic, Chaos, Destruction.
My work here is done.
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give me code of calendar and reservation using java.
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No!
Panic, Chaos, Destruction.
My work here is done.
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give me code of analog clock using java
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Explain to me why I should help you.
The only answer you could possibly give me would be that your a Six Foot blonde with huge knockers who is willing to put out, which I doubt you are.
hmmm pie
modified on Monday, March 9, 2009 6:44 AM
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code for calcuclator in java
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Hi any one can help me how we can identify an adult digital images.....
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Check the time stamp. It would have been created before March 1991.
Panic, Chaos, Destruction.
My work here is done.
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Hi am new to Java and programming in general. I have been trying to work on a project for school of which I have already posted ( a horrible version of the "program") though would just like to understand what I have done wrong. I don't like not knowing how to do stuff...
here is what I have posted :
/*
Write the program in Java (without a graphical user interface)
using a loan amount of $200,000 with an interest rate of 5.75% and
a 30 year term. Display the mortgage payment amount and then list the
loan balance and interest paid for each payment over the term of the loan.
If the list would scroll off the screen, use loops to display a partial list,
hesitate, and then display more of the list.
*/
package cr1;
import java.text.DecimalFormat;
/**
*
* @author
*/
public class CR1 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
DecimalFormat dollarAmount = new DecimalFormat("0.00");
double loan_amount = 200000.00;
int years = 30;
// calculation number of payments
int number_of_payments = years*12;
double intrest_rate = 5.75;
double monthly_intrest_rate = intrest_rate/100/12; // calculates monthly inrest rate
// monthly payment
double monthly_payment = monthly_intrest_rate/(1 - Math.pow(1+monthly_intrest_rate,-number_of_payments)) * loan_amount;
double ipaid = monthly_payment * .0575;
int paymentnumber = 0;
int payCounter = 0;
int pCounter = 0;
double loanbalance = loan_amount - number_of_payments;
while (loanbalance > 0) //
if (payCounter == 0)
{
System.out.println("Starting loan balance: $" + dollarAmount.format(loan_amount));
System.out.println("");
payCounter += 1;
pCounter += 1;
}
else
{
System.out.println("Payment Number:" + payCounter);
System.out.println("Monthly Payment:$"+dollarAmount.format (monthly_payment));
System.out.println("Loan Balance: $" +dollarAmount.format (loanbalance));
System.out.println("Intrest Paid:$ " +dollarAmount.format (ipaid));
loanbalance = loanbalance - monthly_payment;
payCounter ++;
pCounter += 1;
}
if (pCounter ==9 )
{
try
{
Thread.sleep(200000);
pCounter = 0;
}
catch(InterruptedException CR1)
{
// message prints with Java-generated data
}
}
else
{
System.out.println("Than you for using Billy Bakers Program. Have a good DAY!!!");
System.exit(0);
}
}
}
Though I know it is not outputting the information the right way..it is supposed to have 360 payments and its not. I don't know if there is a problem with my math, loop or both. Could someone explain to me what mine eyes cant ?
Thank you very much,
Bactos
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Have you tried debugging it?
ps. Your not meant to put School Work on here as Chris Maunder Said at the top:
"9. If you have a school or university assignment, assume that your teacher or lecturer is also reading these forums."
hmmm pie
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That is not a big deal as I have said I have already posted and will receive a grade for the work above. I just want to understand what it is that I have done wrong. My teacher can read this forum and it will not be a bad thing. I am not asking for people to do my work, just help me understand what I am messing up on. I do not like not knowing or understanding something. I have looked in tutorials for Java, and found lots of information however, none that will help me explain my issues that I am having.
i.e. Am I using the wrong type of loop, not structuring it right or leaving something out.
However I completely understand if no one wants to look at it because its a school assignment.
Bactos
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Again, have you tried Debugging?
hmmm pie
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Yes I have tried debugging it though at the moment it does not have any errors. The code works though I cannot produce the output that I would like.
It is producing the loan amount, the amount left on the loan and everything correct. It is having an issue with fulfilling the appropriate count for number of payments. It only goes to 172 payments instead of the 360 payments ( for the 30 year loan). I have tried using a "for" loop though all the examples I have looked at online seem straightforward however when I try it in (netbeans which is my compiler) it is giving me an error and will not let it compile.
I do :
for (int payCounter =0; payCounter => 359; payCounter++)
{
//code
}
It is telling me that a boolean is required and an int is not allowed, as well as an illegal start of expression.
As a side note I am not quite sure if it is my compiler or Java in general, can you not name a variable twice? I have tired to use say "payCounter" in the main code as well as in a statement though it will not let me compile saying it was already defined.
i.e.
main{
payCounter = 0;
//more variables
for (int payCounter =0; payCounter => 359; payCounter++)
{
//code
}
Though if I take out the veriable in the main when I use it agian in the "for" loop it says that it is undefined.
Bactos
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With debugging you go through the code line by line and have a look at what the variables values are.
Generally in a for loop when you declare the variable it shouldn't be used elsewhere.
The convention is normally to use "i" but it is not necesserily the case all the time.
Bactos wrote: for (int payCounter =0; payCounter => 359; payCounter++)
Should be:
for (int i = 0; i < 360; i++)
As the loop will only run while i is less than 360 rather than payCounter having to be greater or equal to 359 which would never execute the loop as it starts as 0.
hmmm pie
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HAHA!...
Wow I cant believe i did not see that. I always switch <, > around. I understand that it can not => or <= now and assume that is why i keept getting the error. Though I have been looking at switching compilers because I don't get an error code, like I do in my .Net . Because the error codes are easier to look up.
So I am able to get my statement working with for loop and now understand why it was not working in the first place. (because i am a dolt). I do think that something is off with my math so I will keep plugging away until I get it perfect. As I have said before, I don't like not understanding things.
Thanks,
Bactos
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Ok so here is what I have now....
////Write the program in Java (without a graphical user interface)
//// using a loan amount of $200,000 with an interest rate of 5.75% and
//// a 30 year term. Display the mortgage payment amount and then list the
//// loan balance and interest paid for each payment over the term of the loan.
//// If the list would scroll off the screen, use loops to display a partial list,
//// hesitate, and then display more of the list.
//// */
////
import java.text.DecimalFormat;
public class CR1 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
DecimalFormat dollarAmount = new DecimalFormat("0.00");
double loan_amount = 200000.00; // amount of the loan
int terminyears = 30; // term of the loan in years
int number_of_payments = terminyears*12; // sets
double intrest_rate = 5.75; // intrest rate of the loan
double monthly_intrest_rate = intrest_rate/100/12; // calculates monthly inrest rate
double loanbalance = loan_amount - number_of_payments;
double monthly_payment = monthly_intrest_rate/(1 - Math.pow(1+monthly_intrest_rate,-number_of_payments)) * loan_amount;
double P = loan_amount;
double M = monthly_payment;
double J = monthly_intrest_rate;
int N = number_of_payments;
//double ipaid = monthly_payment * .0575;
int pCounter = 0; // sets counter to zero
for (int i =0; i < 359; i++)
{
double H = P * J;
double C = M - H;
double Q = P- C;
P=Q;
System.out.println("Payment Number:" +i);
System.out.println("Monthly Payment:$"+ dollarAmount.format (M));
System.out.println("Loan Balance: $" + dollarAmount.format (Q));
System.out.println("Intrest Paid:$ " + dollarAmount.format (H));
System.out.println();
pCounter += 0;
}//end for
if (pCounter ==9 )
{
try
{
Thread.sleep(20000000);
pCounter = 0;
}// end try
catch(InterruptedException e)
{
//
}// end catch
}// end if
if (loanbalance < 0)
{
System.out.println("Than you for using Billy's Program. Have a good DAY!!!");
System.exit(0);
}// end else
} // end main
}// end program
Everything works!!.. Thanks for your help.
Bactos
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Bactos wrote: loanbalance = loanbalance - monthly_payment;
This is not what you want. You need something like
[code]
loanbalance = loanbalance - "principal" (which is part of your loan payment).
[/code]
So you need to figure out your loan payment (which is comprised of interest AND principal); You need to determine what part of that loan payment is pricipal and subtract it from the loan balance. This needs to be done in a loop for every month (30 years time 12 months = 360). I can guarantee you this will run off the screen page, so you need to handle that portion.
An amortized loan will have large interest and small principal in the early months. In the latter months, the opposite will be true; less interest and more principal as the parts of your loan payment. Just ask anyone who has a 30 year mortgage!
AF Pilot
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I thought that it would be more complicated and so at the start of the assignment I had started doing it with amortized loan though it is supposed to me a simple interest. I think the point of the assignment is not the understanding of the morgage system as much as understanding loops and repeating.
I will mess around with it with the advice and post back in a little while.
~at work so I dont know what a little while will be.
Bactos
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