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So I should use String instead of chars, right??

--- Update ---

I have changed my code and it shows the right answer, but the output shows like a few Errors before the answer:

Error
Error...

Hey guys,

Here is the question: Design Java code to find and return the frequency of string b in string a.

For example , if string a = "abcdabcfabxyabd" and string b = "ab"
The frequency...

Thanks for very clear algorithm. The answer is correct when I don't put factorial "!" into my calculator(18.07950938), but when I put "!" in the calculator it gives me a different answer with the...

Yes, sir. I've tried it too, but it doesn't give the right answer either. I can't quite understand whether I should add something else to it.
Sorry.

Hey guys,

I have a little problem here. The program runs and everything is fine except the actual result. The question is:

Design Java code to calculate and print ∑ (n! + 5) / (n+1)! ; n is an...

Can anybody explain me why javapenguin ws banned?

Thank you for help javapenguin and Norm! I really appreciate it... I learn a lot from both of you guys.

That's awesome, look at the output:

[java=code]
Enter how many random numbers you want to generate
100
0. ***********
1. *************
2. ********
3. ****
4. *********

Now I don't see any mistakes, except after I enter the numbers

[java=code]freq [k]++; // it shows mistake here[/code]

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -5...

Yes! I changed it to


int freq = (int) (Math.random() * 10);



import java.util.*;
public class xyz
{

//Don't you mind to show me how to fix this?
//the last line was just a comment

Norm,

int [] freq = (int) (Math.random() * 10); // cannot convert from int[] to int

this is the only mistake.. is it possible to fix this??

import java.util.*;
public class xyz
{
public static void main(String [] args)
{
Scanner S=new Scanner(System.in);
System.out.println("Enter how...

It doesn't show any mistake before I launch it, but after I've entered the number I wanted to generate, it showed me this mistake


Exception in thread "main"...

Alright! Here is my code:



import java.util.*;
public class Shapes
{
public static void main(String [] args)
{
Scanner S=new Scanner(System.in);

What does this mistake mean:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException… -3
at pratice.main(pratice.java:16)

it should work now.. I don't know why it does appear that...

Thanks a lot for your help! I have already written the program and it actually worked.. I used the DecimalFormat class as you said before!

Thanks a lot! I really appreciate it...

So how to make...

so if I will use arrays, it should look like this?

import java.util.Scanner;
public class shapes
{

public static void main (String [] args)
{

Scanner scan = new Scanner(System.in);

I am not really sure about arrays. We didn't cover the topics about arrays though. Can you tell me more about it?
In the first loop we just put like

for(double num= Math.random(); num <= 10;...

Ok! I will try, but if I am wrong, sorry...

1. Understand what the program is supposed to do. ( I understand, but not so clearly as I should)
2. Initialize and declare the variables(I should...

what about double num = Math,random(); do I have to use it before loop?

but what about double num = Math,random() ? Where do I have to use it?

Am I right using "while" instead of "for"? Sorry, I am just new to programming...

So I have to use if-else ?

I got it, but for example if you wrote 100 as an input, how do the program knows how many *s are needed? How to make *s instead of just random numbers??