Basic Prime Factorization Program

Dec 10, 2014

What's wrong with the code.

public class alltheprime {
public static void main(int a) {
int i, j, k, l, m;
m=a;
k=0;
for(i=2;m>1;i++) {
for(l=2; l<i;) {
l=l+1;

[Code] ......

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Program That Checks If Number Is Prime Or Not?

Feb 11, 2015

I am writing a program that checks if a number is prime or not. Code below.

for(int i = 2; i < P; i++){ 
if (P % i == 0) {
System.out.println(P + " Can also be divided: " + i);
return;
}
}
System.out.println("Prime number.");

It works but, if a number is not a prime. I need to print out all the numbers that it can be divided with. For example if a number would be 8: it can also be divided with 1, 2, 4, 8.

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Program To Pull Prime Numbers Between Two Entered Values

Oct 18, 2014

Program to pull prime numbers between two entered values,

import java.util.Scanner;
public class question6 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter lower int:");

[Code] ....

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Java Program - Find Next Highest Or Lowest Prime Number

May 2, 2014

Java program takes positive int from user and determine if prime. Next the program finds next highest or next lowest prime number.

import java.io.*;
import java.util.*;
public class pa2take2 {
public static void main (String[]args){
int menus; //menu selection

[Code] ......

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Unable To Find Prime Palindrome Numbers Less That A Number By Program

Oct 10, 2014

I want to find the prime palindrome numbers less that a given number by my program. Here is my code, I am trying to find the method to solve the errors when I compile it. It said variable a might not have been initialized in line 41,62,86.

import java.util.Scanner;
public class Lab5{
public static void main (String[] args){
System.out.println("Please input a number");
Scanner Input=new Scanner(System.in);
int num = Input.nextInt();

[Code]...

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Basic Program To Plot Motion Of A Pendulum

Oct 22, 2014

Here is the outline of what the program should do: [URL] .....

So far I've got the very basics in place, I can't really figure out ptplot despite trying to research it online. The only other thing I know is that arrays are not to be used (initially I intended on using them). Here's my code:

//The next line imports the java.io package
import java.io.*;
//Imports math language
import java.lang.Math;
//import ptolemy.plot.*;
//Sets up class
public class cp5 {
//Declares class method called 'main'.

Code] ....

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Basic Console Java Program - Generate Employee ID

Feb 27, 2014

Basic console java program. I need to generate an employee id. I have an employee class that I will paste here so you can see my fields and constructors.

public class Employee {
private String firstName;
private String lastName;
private int id;
public int nextUniqueId = 0;
public Scanner sc = new Scanner(System.in);

[Code] ....

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Basic Stack Hanging - Program Kept Running With No Result

Nov 16, 2014

I was doing some exercises of a java tutorial website, and realized when I ran the code that they had , my program just kept running with no result, why is this? It just hangs.

package mystack;
public class MyStack {
private int maxSize;
private int[] stackArray;
private int top;
public MyStack(int s)

[Code] ....

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Basic Grading Program - Output Should Be Printed With Suitable Labels

Oct 6, 2014

Write a program to request a student number and their marks in 4 subjects. The program must print the student number, total marks and average mark. All outputs should be printed with suitable labels

This is the error am getting

Scanner get = new Scanner (System.in) - got a red line

int student number, total marks, average mark - got a yellow bulb with a red exclamation mark on it.

I just dont understand where the errors is where what the system dont have ... I am using netbeans ....

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Program That Takes User Odd Number And Print Prime Numbers Lower Than User Input

Nov 4, 2014

I have been struggling with this program for weeks. This program is supposed to take a user's inputted odd number and then print out all prime numbers lower than that number.

public class PrimeNumber
{
Scanner scan = new Scanner(System.in);
int userNum;
String neg;

public void getUserNum()

[code]...

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Checking Whether Int Is Prime Or Not?

Oct 25, 2014

//checks wether an int is prime or not
public static void main(String[] args) {
int n = 17;
boolean prime = true;
if (!(n==2)) {
for (int i = 2; i * i <= n; i++) {
if (n % i == 0);

[Code] .....

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List Prime Number From N To M

Oct 15, 2014

I am trying to list of prime number from n to m but my program give only one number

import java.io.PrintStream;
import java.util.Scanner;
public class Check05B
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
PrintStream output = System.out;
output.print("Enter a number to test: ");

[Code] ....

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Prime Number Generator - Range From 0 To 199

Feb 5, 2015

public class printprimes2{
 public static void main(String[] args){
  for( int i = 1 ; i <=199 ; i++ ) //iterate 1 - 199; 2 is prime {
for ( int j = 2 ; j < i ; j++ ) //iterate 2 - potential composite EXCLUSIVELY; every number can be divided by one and itself

[Code] ....

It doesn't print only prime numbers but all numbers that range from 0 to 199. What do you think I am doing wrong?

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JSF :: Printing Only Part Of Prime-faces Page?

Jan 15, 2014

I have a print button as below

<p:commandButton id="printit" value="Print" type="button" icon="icn-print">
<p:printer target=":topForm:data" />
</p:commandButton>

when i click print button only top half of the page is getting printed and bottom half is pushed to next page. How do i fix this issue.

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Printing Number Of Prime Numbers In A Range?

Feb 13, 2015

The assignment is to make a program that prints the number of prime numbers in a range. This is what i have so far. The output is a list of 2s. I created the for loop to cycle through the range of 17-53 and nested a while loop within to test each incident of the for loop to check for divisors starting with 2 until the modulus result is 0 resulting in a false for being a prime number. Then the loop should increment to the next i value. The last part is an if statement that i had intended to add counters to the k variable that would keep track of the number of prime numbers.

boolean isPrime = true;
int j = 2;
int k = 1;
for (int i = 17; i <= 53; i++){
{
while (i % j == 0){
isPrime = false;

[Code] .....

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Improving 10001st Prime Number Project?

Mar 7, 2014

I have been working on a Project Euler problem which is to find the 10001st prime number. I made the project in java and it gave me the correct answer (104743) . I notice that it had taken 17 seconds to find the answer. how to improve the efficiency of my Java program - at the moment it is bruteforce.

static boolean isPrime;
static int primeCount;
static int forI = 1;
static int latestPrime;
public static void main(String[] args){
long startTime = System.currentTimeMillis();

[code]....

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Return Biggest Prime Factor Of Given Number

Sep 10, 2014

One of our assignments this week was to make a program that when given a number it will return the biggest prime factor of that number. So for example if the program is given the number 15, the output is 3.

144 gives you 3 also.
17 gives you 17
21 gives you 7.

Anyways, after some time trying out various things and combining stuff i googled with my textbook I somehow stumbled upon a code that works. But I cannot for the life of me understand how it works. I think it has something to do with the inner loop and the outer loop. But I feel like i cant go on without understanding how it works.

Here is the code:

public class BiggestFactor {
public static void main( String[] args ) {
int N;
N = StdIn.readInt();
int n = N;

[Code] .....

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Determining User Input To Be Prime Number

Feb 12, 2015

Any better way to write a program that takes a user number input and the program determines whether or not the number is prime or not. It was suppose to be a number between 0 and 8,000,000.

import java.util.Scanner;
public class prime1
{
public static void main(String args [])

[Code].....

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Sieve Code To Find Prime Numbers

Jan 16, 2015

I am doing a sieve code to find prime numbers.

public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println(" Enter the maximum number ");
int maxNumber = scanner.nextInt();
int[]numberList = createList (maxNumber);

[code]....

I have a problem with the output. It only get as far as marking the multiples of 2. It does not mark the multiples of 3 and so on.Example output: If the range is from 2 to 15 the output is :2, 3, 0, 5, 0, 7, 0, 9, 0, 11, 0, 13, 0, 15 note: 0 means its marked.As you can see it only marks multiples of 2 but it does not mark multiples of 3 above. I think the problem lies in the for loop inside my main method, because the index does not increment.

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Calculate If User Enters 20 - Output Should Be 71 Prime

Jul 22, 2014

import java.util.Scanner;
//Calculates the prime #1000.
public class Prime {

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int n, i=2, x=2;

[Code]....

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Weed Out All Prime Numbers Without Using Any Kind Of Division?

Dec 15, 2014

The challenge is to weed out all the prime numbers without using any kind of division (%, /). My code doesn't weed out certain numbers, such as many multiples of 5, the number 49, etc, and I am not sure why. Here is my code.

My logic for the for loops was this: Starting with the upper numbers of the ArrayList, find every number that is a multiple of that number and remove it from the ArrayList. Every time you find a multiple, increase the variable multiply, so the program knows what the next multiple to look for.

// program doesn't work yet.
import java.util.ArrayList;
// import java.util.ListIterator;

public class Sieve2
{
public static void main(String[] args)
{
int upperLimit = 55;
ArrayList<Integer> primes = new ArrayList<Integer>();

[Code] .....

And this is the output:

1 2 3 5 7 11 13 17 19 23 25 29 31 35 37 41 43 47 49 53 55

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Basic Calculator Functions

Jul 2, 2014

my task is to add a few functions to an example calculator. I managed to add a divide button but I simply can't figure out how to add a working Pi and reciprocal function.

package newjavaproject;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class CalculateurNC extends Applet {

[code]....

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Basic Cost Calculator

Oct 20, 2014

Why I am getting errors for this program I (tried) to write. I am new to java.

import java.util.Scanner;
public class TheBarkingLot {
public static void main(String args[]) {
int n;
Scanner input = new Scanner(System.in);
System.out.println("How many large dogs are boarding today?");

[Code] ....

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Basic Grade Calculator

Jan 24, 2015

im considered quite the "javanoob" as my account name states..The assignment is to basically take a number that is entered by a user, and based off what they type in, display a corresponding grade letter. For example, if they enter a number between 90-100, they should receive a response that they received an "A". Now, this is fairly simple using an if/else statement, but my professor wanted us to implement this, using a switch case to teach us the difference.

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

System.out.println("Please enter a number to find out what letter grade you have recieved");

[code]...

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Web Services :: GET Or POST - Determine If Passed In Integer Is Prime Or Not

Jan 27, 2015

I have an endpoint that will determine if a passed in integer is prime or not. Should the request to this endpoint be GET or POST? Right now, I'm thinking it should be GET since it doesn't do anything to any resource.

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Mar 30, 2015

I moved some static html pages I was hosting from apache into tomcat. (no point in running two servers) This works as expected, but I'm having trouble with the authentication part. In apache the authentication was handled by htaccess. I tried various tutorials on the web about configuring basic authentication in tomcat using WEB-INF/web.xml in tomcat, but I'm not sure this approach applies to static html pages. Using basic authentication for static html in tomcat?

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