Array Of Specific Length Filled With Random Numbers

Feb 15, 2015

I was inquiring about selecting random numbers from a Fibonacci array, the original post for which is here: Exiting a 'for' Loop Early. I have managed to achieve this with the following code:

System.out.println("Random numbers from the Fibonacci array");
for(int i = 0; i < limit; i++) //Limit is an 'int' of 15 & is set as the length of the Fib. array. I'm calling it for the Random array, too!!
{
Random dice = new Random();
int randomIndex = dice.nextInt(array.length); //The Fib. array was simply called 'array'!!
if (array[randomIndex] < 100)
{
System.out.print(array[randomIndex]+ " ");
}
}

When the code prints I get a random set of numbers which occur in the Fibonacci sequence preceding it. However, the actual length of this Random array also changes each time, and never more than the limit of 15 specified in the 'for' loop. What I want to try and do is print the Random array with a specific length each time. I've tried changing the conditional statement of the 'for' loop in different ways to set the Random array's length, but had no luck.

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Oct 31, 2014

I have a Char stack: ArrayStack<Character> stek=new ArrayStack<>();

The stack is filled with numbers and characters (only '+' and '*' ), but I need to make calculations, so I need the INT values of the numbers i pop from the stack. So each time I need to make a calculation, I have to pop two numbers, convert them into INT ,then add/multiply them, and put them back into the stack again, but as CHAR (because the stack is not accepting them to be added as INT)

int a= Character.getNumericValue(stek.pop()); //stack no1
int b= Character.getNumericValue(rezultat.pop()); //stack no2
int tmp=a*b;
char tmp2 = (char) tmp;
stek.push(tmp2);

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Nov 10, 2014

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Nov 21, 2014

I am writing a program that creates an array with random numbers. Then the user can choose what number of the array he/she wants to check the occurance of. This works fine, but the numbers generated seems very weird, only 2 of the 10 possible numbers are generated. 0 and one of the other 9 numbers, the 0 is always 10100 and the other one is always 101.

import java.util.Random;
import java.util.Scanner;
public class OppgaveC {
public static void sjekk() {
int randomArray[]=new int[101];
int countArray[]=new int[10];
Random rand = new Random();

[Code] ....

it also says i have a memory leak on my scanner, ow can i close this?

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Mar 7, 2014

I'm trying to generate random 100 numbers, from 0 to 9, in an array using Math.random, but it only outputs 0s which is very confusing to me. Also, I need to be able to count how many different integers there are like 0s, 1s, 2s... 8s, 9s.

Here's my code, I only got as far as the array then got stumped on the counting part.

import java.util.Arrays;
public class countDigits {
public static void main(String[] args) { 
//Create random generator and values
int numbers = (int)(Math.random() * 10);
int arrayCount = 1;

[Code] ....

and my results

0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0

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Oct 1, 2014

Is my code right for this pseudocode:

<Declaration of the array for storing random integers and other necessary variables and / or constants. >

private int numbers;
private int max;
private int[] integer;
private Random generator;
public integer ( int n, int m )

[code]....

I need to create a program that draws random numbers and stores them in an array. How many numbers to be drawn is dependent on the array length, which is a parameter in the class constructor. (The entire array to be filled!) The program shall, however, just save the figures are not drawn already. (Ie, the array must contain only one instance of each numeral.) All figures drawn should be in the range of 100 to 1000, both limits included. These limits are defined as named constants. When all the numbers are generated and stored in the array, the program should find the largest, smallest and average value of the numbers in the array. In addition, it should find the value closest gjennomnstittetsverdien.

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Apr 16, 2015

I have my code which will generate a random string using an ArrayList. However, I aso want to have it generate them in random lengths, not just using all the chars and numbers.

public static void main(String[] args) {
String[] CHARS = {"A","B","C","D","E","F","G",
"H","I","J","K","L","M","N",
"O","P","Q","R","S","T","U",
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Collections.shuffle(pass);
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}
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Feb 1, 2015

I'm trying to make a program that generates 20 random integers between 1 and 20 and then prints the list of random numbers to the screen. After that, I want to print a different list to screen with the same numbers from the first list only skipping any number that has been already printed to the screen. So two lists are printed to the screen. The first one has 20 random numbers. The second one has those same 20 numbers but only prints the numbers in the first list that aren't duplicated. So if m

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public void randomNum(){
System.out.println("Twenty random integers: ");
int max = 20; // max value for range
int min = 1; // min value for range
Random rand = new Random();
int[] all = new int[20];

[Code] ....

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Jul 31, 2014

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Feb 3, 2014

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The program must use a "Number" class which includes at least the following methods:

Number ( );
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Number subtract (Number RHS);
String toString ( );

This is what i have but it only adds positive numbers and it doesn't subtract problems like 7.05-8.96. Also some of it was what our teacher gave us like alignwhole method

import java.util.Scanner; 
public class Number{
private String whole;
private String decimal;
private String sign;
  public static void main (String[] args){
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[code]....

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Feb 5, 2014

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Java Code:

import java.util.Scanner;
public class Number{
private String whole;
private String decimal;
private String sign;

[Code] .....

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My code:

public class Number {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int k=0;
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[code]....

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Java Code:

import java.util.ArrayList;
import java.util.Scanner;
public class AL
{
// A regular array like int arr[] has to have its size declare before run-time and it's not dynamic which mean it can not grow or expand on its own.
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motorbikes
motorbikes
cars
Trucks
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motorbikes
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int max= 10;
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[code]...

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