Write a program called ComputePi to compute the value of pi using the following series expansion. you have to decide on the termination criterion used in the computation(such as number of terms used or the magnitude of an additional term). Is this series suitable for compute pi?
PI=4*(1-(1/3)+(1/5)-(1/7)+(1/9)-(1/11)+(1/13)-(1/15)+.......)
So basically, I've been trying to create a for loop that asks the user for a number between 1 and 30, then calculates the total of the series of numbers. For example, if 15 is entered, the calculation should be 1/15+2/14+3/13+...15/1 which would equal approximately 38.1. The problem I'm having is that the code doesn't loop whenever I type a number for some reason, which results in a very incorrect calculation. Here is my code so far:
import java.util.Scanner;
public class HmwLoop {
public static void main(String[] args) {
double sum = 0;
for (double num1 = 1, num2 = 30; num1 <= 30 && num2 >= 1; num1++, num2--)
[Code] .....
I have given a series like this..
10+13+16+19+....+50;
Now I've to find the summation for this. I did it like following bt its not correct..
public static void main(String[] args){
int i=0,k=10, sum=0;
k=k+2;
for(i=10;i<=50;i++){
sum=sum+k;
}
System.out.println(" "+sum);
}
how to find the sum of the following series
f(x)= 1+3+5+.......+2n+1
this what I did
Java Code: for ( n=0;x>0 && x<2*n+1;n++)
{
sum=sum+2*n+1;
n++;
System.out.println(sum); mh_sh_highlight_all('java');
Is it infinite loop?
is this correct ?
My project is writing a program that generates a series of numbers to appear like a social security number (XXX-XX-XXXX). My code runs.. But any number below 10 it just shows one number (XXX-X-XXXX). What do I need to enter in to my code so that if the number is <10 it will show (00,01,02,03....)?
Java Code:
import java.util.Random;
public class IDnumber
{
public static void main (String[] args) {
Random generator = new Random()
int num1 = (generator.nextInt(7) + 1) * 100 + (generator.nextInt(8) * 10) + generator.nextInt(8);
int num2 = generator.nextInt(74);
int num3 = generator.nextInt(10000);
String IDnumber = num1 + "-" + num2 + "-" + num3;
System.out.println(IDnumber);
}
} mh_sh_highlight_all('java');
How to print 10 numbers in Fibonacci serious aftet given number?
Like 13 21 34...
write a java program to check divisibility of a series of numbers that a user inputs the starting and ending numbers and also the number to check divisibility with.
The problem I am having is it only checks the first number and doesn't check the rest.
import java.util.Scanner;
public class MyMidTermAssignment
{
public static void main(String[] args) {
int numberInputBeginning,numberInputEnding,divisibleByNumber;
System.out.println("Enter first number of series");
[code]....
Program to generate Fibonacci series program using java multithreading.
View Replies View RelatedMy code:
public class Fibonacci {
/**
* @param args
*/
public static void main(String[] args) {
int f[]=new int[100];
for(int j=0; j<100;j++){
f[j]=j;
[Code] ....
How can I improve my code?
I am having trouble compiling my code for a java application that is supposed to print out the infinite series for Pi. Here is my java code:
//a java application that generates the infinite series for Pi, ie 3.14159...=4-4/3+4/5-4/7+4/9
public class Pi{
public static void main(String args[]){
//declare and initialize variables
long counter=1;
double pi;
[Code] ....
Here is the error in my output that results when I attempt to compile my code:
C:UsersanonymousDesktopchapter five exercises for javaPi.java:21: error: variable pi might not have been initialized
total=total+pi;
^
1 error
Tool completed with exit code 1
Why do I need to initialized pi when I already initialized the total?
I wrote java program to print fibonacci series till user wants it! But I'm getting this compilation error -
fibo.java:Incompatible types
found:java,lang.String
required:int
n=s.readline();
import java.awt.*;
import java.io.*;
import java.util.*;
class fibo {
public static void main(String args[])throws IOException {
int arr[]=new int[100];
[Code] ......
write a program to determine the sum of the following harmonic series for a given value of n:1+1/2+1/3+.............................+1/n the value of n should be given interactively through the keyboard.
View Replies View Relatedtfrreee i want to display given series in ascending order in java prog here is an error : E:Javajdkin>java ascend 505671Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 7 at ascend.main(ascend.java:9)
Java Code:
class ascend
{
public static void main (String args[])
{
int s[]={ 50,71,81,21,7};
int i;
for(i=0;i<=s.length;i++)
[Code]...
I'm trying to build a program that would present the user (well...me) with a rather large list of various check boxes (and combo boxes, etc...but for sake of the question I'll limit it to check boxes) and the selections would not only need to be stored in some way so they could be reloaded, but also they would need to have the "data" used to build sentences.
For example, part of the form would have a checkbox list like:
Emotional Issues -
Emotion 1, Emotion 2...Emotion 40
Then, at the end of the form I would be able to save client, load client, or generate report. When doing the generate it would output something like:
"Client's first name reported having emotional disturbance in areas of 'Emotion 1', 'Emotion 4', and 'Emotion 12'."
There, of course, would be probably several hundred check boxes, combo boxes, etc. throughout this program building a rather complex "report" when it's all said and done. So where I am stumped in on the methodology or approach that would be best for getting, storing, retrieving, and outputting this information.
So I've been writing a program that converts user input from English to Morse Code and vice versa.
Here's my code:
public class Project1 {
private final static String [] English = { "a","b","c","d","e","f","g","h","i","j","k","l", "m","n","o","p", "q","r","s","t","u","v","w","x","y","z", " ","1","2","3","4","5","6","7","8","9","0"};
private final static String [] Morse = { ".-", "-...", "-.-/>/>/>/>.", "-..", ".", "..-.", "--.", "....", "..",".---", "-.-/>/>/>/>", ".-..", "--", "-.", "---", ".--.", "--.-/>/>/>/>", ".-.", "...", "-","..-","...-" , ".--" ,"-..-","-.-/>/>/>/>-", "--..", "|", ".----", "..---", "...--", "....-", ".....", "-....","--...","---..", "----.", "-----" };
public static void main( String [] args ) {
int n = Input.getInt( "Enter 1 for Morse to English, 2 for English to Morse." );
switch ( n ) {
[Code] ....
When I compile my program, I get the error message: "illegal start of expression" at my toEnglish and toMorse methods, as well as " ';' expected " at the same place.
Here is a simple program on applets that is giving me a bit of headache since it cannot always display the two numbers that it is supposed to: the largest and smallest of the five input integers.....I cannot see where i went wrong, you can always create separately the HTML file to load the applet in an appletviewer of your won size.
*
23.6 (Largest and Smallest) Write an applet that reads five integers, determines which are the largest and smallest integers in the group and prints them. Draw the results on the applet.
*/
import java.awt.Graphics;
import javax.swing.JApplet;
import javax.swing.JOptionPane;
[Code] .....
Write a program reads in a series of passwords into an array. Store 10 passwords. After creating the password array, have the reader enter a password and see if it is in the array. Fi it is there, print "Valid password" and if it is not there, print "Invalid password."
This is what i have so far
Java Code:
public class passwordMatch
{
public static void main (String [] args){
String [] myArray = new String[10];
myArray[0] = "jasmine22";
myArray[1] = "jackson77";
[Code] .....
It doesn't compile. It gives me error saying .class expected next to String.myArray[]
I have to get the user to enter in 10 numbers and with those 10 numbers I have to find the total, average, smallest, largest numbers in the set the user inputs. I have the total and average already figured out but how would you go about trying to find the largest and smallest numbers within this set of code.
import java.util.*;
public class testhw7
{
public static void main (String [] args) {
Scannernumberin = new Scanner (System.in);
doublevalue[];
doubletotal;
[Code]...
I am trying to write a java program that prints out the number that is the mathematical constant e. As you input a number, the larger it gets , the closer it comes to 2.71828 . Here is my code:
//taylor series that prints out e^1=1+1/1!+1/2!+1/3!+.....
import java.util.Scanner;
public class taylor_1
{
public static void main(String args[]) {
Scanner input=new Scanner(System.in);
int factorial =1;
[Code] .....
Here is the output of my code:
enter n
9
Taylor series is 9.0
So I have a program for a project that permutes a random series of numbers using Java's Rand function. Basically I use a seed and a number of items I want in the arrangement of numbers, and the program makes a permutation with no two numbers being repeated. Only arrays can be applied to it, so I've been hard at work finding a solution.
Here's the code so far:
public static int permutation[];
public static void permute(int numOfItems, int seed){
permutation=new int[numItems];
Random rand = new Random(seed);
permutation[0]=rand.nextInt(numItems-1);
[Code] ......
So basically I'm wanting the program to make a randomized list of numbers from the number of items I pass to the Permute method with no duplicates. I'm having some level of success with what I have written, as it gives me a randomized list when printing the output, but for some reason the first for statement in code never terminates fully, but instead runs indefinitely when generating the last integer.
For example, if I want to put 10 with a seed of 0 into it and make a list from 0-9, it will print 74283510, which is only 8 different integers. permutation[0] is manually set at the beginning of the method, which accounts for one more, but that's still only a list of 9, so I'm just wondering why the last integer is not being generated and why the program keeps looping and not terminating? I'm know for sure it's something I'm overlooking.
I'm just not noticing why it won't display the answer. I'm trying to solve this book problem......
"Write a for loop that calculates the total of the follower series of numbers:
1/30 + 2/29 + 3/28......+30/1"
Here is what I have..
public static void main(String[] args) {
double total = 0;
for (double a = 1, b = 30; b < 1; a++, b--) {
total += (a / b);
}
System.out.println(total);
}
}
When launched, the output is 0.0. I tried changing the variables a and b to doubles but didn't change anything...
I'm trying to change the code on a Fibonacci series program that would allow me to exit the loop early if I exceed a specified number. The user enters any 2 random numbers (which will be the 1st 2 no.'s of the Fibonacci sequence printed to screen) and then continues up to a 'limit' on the number of numbers set in code. Here's the code:
int[] array = new int[limit]; //Define an array whose length is set by an int value for limit!!
array[0] = x; //User supplies a int value for x which takes the 1st position in the array!!
array[1] = y; //...and an int value for y in the 2nd position!!
for (int i = 2; i < limit; i++) //Start from the 3rd position of the array when carrying out calculations!! {
array[i] = array[i-1] + array[i-2];
[Code] ....
To exit the code/ 'limit' early if the array prints a number higher than 100, I tried putting a 'while' condition before the last line, as follows:
while (array[i] < 100)
System.out.print(array[i] + " ");
Can I even use a 'while' loop within an array, or is there some other way I need to integrate it?
I made a MVC calculator. I was wondering if you could take a look at my design and if I was on track. I am still working on getting it to actually calculate something. All the buttons respond and print text on the JTextField but it is not calculating.
package calculator.MVC;
import javax.swing.JButton;
import javax.swing.JTextField;
public class CalculatorModel {
private int sum;
private int number;
private char opt;
[code]....
public class NewClass4 {
public static void main(String[] args) {
int a = 1;
int b = 2;
int c = 3;
a += 5;
b *= 4;
c += a * b;
c %= 6;
System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("c = " + c);
This is the code
public class PondRadius {
public static void main (string[] args) {
//Calculate the radius of a pond
//which can hold 20 fish averaging 10 inches long
int fishCount = 20;//number of fish in pond
int fishLength = 10;// Average fish length
int inchesPerFoot = 12;//number of inches in one foot
[Code] ....
And here is the error or exceptions i received
C:javaLesson1>javac PondRadius.java
PondRadius.java:23: error: ')' expected
System.out.println("To hold" + fishCount + fish averaging " + fishLength +" inch
es long you need a pond with an area of
" +
[Code] .....
So I have this code to calculate the lowest value of an array:
public class Exercise1 {
public static void main(String[] args) {
int[] theArray = {1/*/,2,3,4,5,6,7,8,9,10/*/};
int result = Exercise1.min(theArray);
System.out.println("The minimum value is: " +result);
[code].....
and I need to write an exception class that should be thrown if the array does not hold any elements.