Need help with the for loop

Hello,
I hope someone can point me in the right direction for my next assignment. I am very new at Java programming. For my next assignment for class I will need expand my previous program which was a mortgage calculator. The first assignment we wrote a program to show the monthly payments of a $200,000 loan at 5.75% for 30 years. Now we have to output all 360 monthly payments with pauses in between so it doesnt scoll off the page. The calculation that we use is:
month_payments = (principle * monthlyinterest) / (1-Math.pow(1 + monthlyinterest, - months));
My question is how do I get the correct calculation outputed 360 times. I would like to use the "for loop" to do this. Also what is the correct way to do the pause command? I do not want someone to write the code, I just want some help to where I need to start off, I want to learn this on my own.
Thanks in advance,
DC

for (int i ; i < 10 ; i ++ ) { System.out.println("Come sail away"); }
or;
int i = 0;
while(i < 10)
i++;
System.out.println("Come sail away");
}

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I need help with my for loop in this array

Ok well, I can't get my code to work. Also, please remember that this is just my draft so it isnt pretty. I will fix it up later so please look at it. The thing I want to do is look into the array for a time that matches what the user entered and return the toString() of that one. I know there is something wrong with my for loop but I cant figure how to fix it. please help. here is what i have so far:
import javax.swing.JOptionPane;
public class Runner
    public static void main (String[] args)
        String timeStr;
        int time, again, optiStr;
        Inbound[] in = new Inbound[25];
         in[0]=new Inbound ("",0,"On Time num0");
         in[1]=new Inbound ("",2,"On Time num1");
         in[2]=new Inbound ("",3,"Delayed num2");
         in[3]=new Inbound ("",4,"On Time");
         in[4]=new Inbound ("",5,"On Time");
         in[5]=new Inbound ("",6,"Canceled");
         in[6]=new Inbound ("",1,"Canceled num6");
         in[7]=new Inbound ("",8,"On Time");
         in[8]=new Inbound ("",9,"Delayed");
         in[9]=new Inbound ("",10,"On Time");
         in[10]=new Inbound ("",11,"Delayed");
         in[11]=new Inbound ("",12,"On Time");
         in[12]=new Inbound ("",13,"Delayed");
         in[13]=new Inbound ("",14,"On Time");
         in[14]=new Inbound ("",15,"On Time");
         in[15]=new Inbound ("",16,"On Time");
         in[16]=new Inbound ("",17,"Canceled");
         in[17]=new Inbound ("",18,"On Time");
         in[18]=new Inbound ("",19,"On Time");
         in[19]=new Inbound ("",20,"Canceled");
         in[20]=new Inbound ("",21,"On Time");
         in[21]=new Inbound ("",22,"Delayed");
         in[22]=new Inbound ("",23,"On Time");
         in[23]=new Inbound ("",24,"Cancled");
         in[24]=new Inbound ("",7,"On Time num24");
        do{
            timeStr = JOptionPane.showInputDialog ("In military time, what hour do you want?");
            time = Integer.parseInt(timeStr);
            if (time<=0 || time>24)
             JOptionPane.showMessageDialog (null, "Error");
             optiStr = JOptionPane.showConfirmDialog (null, "If you want Incoming flights click Yes, but if not click No");
            if (optiStr==JOptionPane.YES_OPTION)
//(ok this is the for loop i am talking about )
                for (int index = 0; index < in.length; index++)
                  if ( time == Inbound.getTime())
               JOptionPane.showMessageDialog (null, Inbound.tostring()); //return the time asked for
//               else JOptionPane.showMessageDialog (null, "else");
            }//temp return else if failed to find time asked for
//             else
//               if (optiStr==JOptionPane.CANCEL_OPTION)
//                 JOptionPane.showMessageDialog(null,"Canceled");
//              else
//                {Outbound.run();
//                JOptionPane.showMessageDialog (null, "outbound");}//temp
              again=JOptionPane.showConfirmDialog(null, "Try again?");
        while (again==JOptionPane.YES_OPTION);
}any help would be greatly appriciated.

rumble14 wrote:
Ok well, I can't get my code to work. Also, please remember that this is just my draft so it isnt pretty. I will fix it up later so please look at it. The thing I want to do is look into the array for a time that matches what the user entered and return the toString() of that one. I know there is something wrong with my for loop but I cant figure how to fix it. please help. here is what i have so far:
>//(ok this is the for loop i am talking about )
for (int index = 0; index < in.length; index++)
if ( time == Inbound.getTime())
JOptionPane.showMessageDialog (null, Inbound.tostring()); //return the time asked for
Inbound.getTime() is a static method of your Inbound class, that always returns the same value, I presume? As opposed to each of the 25 members of your array in, which have individual values?
Edited by: darb on Mar 26, 2008 11:12 AM

Need help with a For loop that uses a Break statement

I need to create a for loop which counts down from 100-50 and divides the number being counted down by a counter. Can anyone help me?
public class Break
public static void main ( String args []) (;
     int total = 0
     int counter = 0
     for { (int number = 100; total >=50; total --)
     if (counter == 0)
     break;
     } // end of for loop
     int output = number/counter
     system.out.printf("The number is" %d output/n)
     }// end of method main
}// end of class Break

Im sorry I didnt explain myself very well i do not need the break statement at all.
I now have this code:
public class BreakTest
   public static void main( String args[] )
      int count; // control variable also used after loop terminates
     for (int i = 100; i >= 50; i = ++count)
   if (i >= 50) {
    continue;
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   } // end main
} // end class BreakTest
/code]
and i get these error messages:
F:\csc148>javac BreakTest.java
BreakTest.java:9: variable count might not have been initialized
     for (int i = 100; i >= 50; i = ++count)
                                      ^
BreakTest.java:15: variable count might not have been initialized
      System.out.printf( "\nBroke out of loop at count = %d\n", count );
                                                                ^
2 errors

Need help with a for loop

Hi all
I have a dir that has a list of folders that are created using php that my customers upload to. the PHP creates a new folder using the system date on the days that they upload. (using this format yyyymmdd)
What I am trying to do is loop thou the folders and get todays folder and list the files that are in todays folder. I have been able to do this up to the point of if a customer folder does not have a folder called todays date.
I know I need some sort of try / catch but don't know what.
Can anyone help me please
Thanks for you time and help in advance
Craig
public void getfolderList() {
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        if (!store.endsWith(".DS_Store")) { // This is a mac file name Only
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          if (!store.endsWith(".DS_Store")) { // This is a mac file name Only
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            for (int td = 0; td < todaysFiles.length; td++) {
              todaysFileName = "" + todaysFiles[td];
              System.out.println("There is no folder Today........" +
                                 todaysFileName);
}

A quick guess would be that after the sStatement
File[] todaysFiles = todaysFolder.listFiles();todaysFiles is null if todaysFolder doesn't exist and you get a NullPointerException when trying to access todaysFiles.length in the following for-loop.
If that doesn't help, please be a bit more precise what kind of Exception occurs...

Need help with basic "for" loops!

Here is my prompt for class:
Write a program that prompts the user to enter a sentence from the keyboard using JOptionPane.showInputDialog.
The program will print the characters back with the first letter of each word changed from lower case into upper case. If you have a capital letter in the original line and it is not the first letter of a word, then this letter should be switched from upper case to lower case. The only capital letters that should appear in the line must be the beginning letter of every word in the line. All other characters will remain the same.
I figured everything out except for one part. How do I make the first letter of each word change from lower case into uppercase? How do I switch a letter that is uppercase in the middle of a word to lowercase? Last but not least, how do I make sure that the only capital letters in the sentence are the first letter of each word?
I need to do this using for Loops, charAt(), and if/else statements because this is just an intro class. I just can't figure this last part out! Help please!

String words = ...;
StringBuilder builder = new StringBuilder();
for (int i = 0; i < words.length; i++) {
char c = words.charAt(i);
boolean isUpper = Character.?(look up the methods in java.lang.Character)
boolean isLetter = ? (there are actually 2 ways to do this. Hint: you can use <= and >= and && to solve this)
if (!isLetter) {
continue;
} else {
// check if this is the start of the word. How do you know that you are at the start of a word?
if (!isUpper && isStartOfTheWord) c = Character.toUpperCase(c); //Hint: there is a way you can do this with x + y
else if (isUpper) //make c lower case
builder.append(c);
return builder.toString();

Please help with the FOR loop and the array..

I was trying to place some words in the Movie Clip
"TextPanel" and set a
random position to each of them.
But it's not working.
1) I created a Movie Clip "word" and inside that MC I created
a text field
and gave it an identifier "textFiled".
2) The linkage name for Movie Clip "word" I set to "word".
3) In the actionscript I created an Array called "aWords".
4) Then I created a FOR loop that should
place (attach) Movie Clips "word0", "word1", "word2" and
"word3" to the
movie clip TextPanel, and set the textField text for each of
them to the
text from the Array.
But the script attaches 4 Movie Clips with a name
"Undefined", instead of 4
different names (from the Array).
What is wrong with this script?
var aWords:Array = [apple,banana,orange,mango];
for(i=0;i<aWords.length;i++){
var v = TextPanel.attachMovie("word","word"+i,i);
v.textFiled.text = aWords
v._x = randomNumber(0,Stage.width);
v._y = randomNumber(0,Stage.height);
Thanks in advance

But in my Post I already wrote v.textFiled.text = aWords
so I don't understand what were you correcting..
And one more:
I have tested it by changing the
v.textFiled.text = aWords; to v.textFiled.text = "some
word";
and it's working fine.
So there is something wrong with the Array element, and I
don't know why..
"aniebel" <[email protected]> wrote in
message
news:ft2d5k$lld$[email protected]..
> Change:
> v.textFiled.text = aWords;
>
> to:
> v.textFiled.text = aWords
>
> It needs to know which element inside the array you want
to place in the
> textfield (or textfiled) :)
>
> If that doesn't work, double check that your instance
name is correct
> inside
> of "word".
>

Need help with a for loop - string checking

I am trying to create a for loop to make sure a user entered string contains only letters but something doesn't take. No errors, but the inner loop of try again doesn't ever come into play. What am I missing please.
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     for (int i = 0; i < k.length(); i++)
          char c = k.charAt(i);
          int m = c;
          if (((m < 97) && (m > 122)) || ((m < 65) && (m > 90)))
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System.out.println(k);

molested,
(you and BigDaddyLoveHandles should get on well)
I would use regular expression for that... which would look something like this...
// get response containing at least one letter.
while (true) {
String response = keyboard.nextLine();
if( response.matches("[a-zA-Z]+") ) break;
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}Message was edited by: corlettk - frog got the {

Need help with a for loop please

Hello,
I want to do the following:
double V[][] = sphere.V2;
double polygon[][][] = {
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The demand of my application is that i can not replace for loop with a while loop.because i need fixed number of iterations and as far as i know fixed iterations could be only with possible with the for loop.

the demand of my application is that i can not replace for loop with a while loop.because i need fixed number of iterations and as far as i know fixed iterations could be only with possible with the for loop.
your recommended second option that i could add true/false case.
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loop, how can i send stop command from outer while
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thanks"

You can execute a fixed number of iterations using a while loop by comparing the iteration count to the number of iterations you want and wiring the output of that comparison (e.g. Less Than or Equal To) to the continue (or stop) terminal of your while loop. Which comparison you use depends on personal preference, where you wire the desired count and the interation count, and whether you're using the while loop as Continue if True or Stop if True.
Ben gave you step-by-step instructions in response to your previous question. Look here for Ben's response.
Ben's response looks pretty good and detailed to me. It certa
inly deserved better than a 1-star rating.

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Need help with the for loop

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