Make Distance In Positive Number
Aug 22, 2014
I've been programming for years in a basic programming language, so doing something a bit more advance like this is quite challenging but I love it. where I've gone wrong here? I've been following a tutorial but I've decided to take what I've learned and make my own program but something seems to be wrong.
class Function{
public double abs(int num)
{
if (num > -1)
{
return num;
}
else
{
return -num;
[code]...
Basically trying to get the distance between to numbers but in a positive not negative number.
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Nov 20, 2014
I am 4 weeks into my Intro to Java course and I am having a bit of trouble with my code. I need to make a program that will take a user inputted number, space the numbers out, then add them to a total sum. What I am having a hard time with is when I enter a negative number. I can't figure out what I need to do to have my program ignore the "-" in the string.
import java.util.*;
public class Week4_Programming_Problem
{
static Scanner console = new Scanner(System.in);
public static void main(String[] args) {
int number, digit, sum=0;
char digitPos;
[code]....
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Mar 16, 2014
lines 7, 8, &12 "primes" are underline in red (prime cannot be resolved) is what pops up when i hover over the x's.
i don't get why that is.
package assignment7;
public class Exercise3
{
public static void main(String[] args)
{
Prime.setSize(1000);
for (int p = Primes.next(); p < 30; p = Primes.next())
[Code]...
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Mar 17, 2014
Lines 7, 8, &12 "primes" are underline in red (prime cannot be resolved) is what pops up when i hover over the x's.
I don't get why that is.
Java Code :
public class Exercise3
{
public static void main(String[] args) {
Prime.setSize(1000);
for (int p = Primes.next(); p < 30; p = Primes.next()) {
int n = (int)Math.round(Math.pow(2,p)) - 1;
System.out.printf("%d 2^%d-1%d", p, p, n);
if (Primes.isPrime(n))
[Code] ....
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Apr 30, 2015
I am trying to make a method that generated a random number between two values that can be negative or positive.
So:
rand(-0.2, 0.2);
would give one of these: -0.2, -0.1, 0, 0.1, 0.2
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Oct 24, 2014
I want to create a program where i can output a number. ex. 3452 And the program will output 3000: three thousand 5: five 53: fifty-three
How can i make the program understand the 10-number system?
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Jan 16, 2014
I'm studying about arrays and I have some questions:
First, is there any difference between these two?
Java Code:
int x[] = new int[3];
int[] x = new int[3]; mh_sh_highlight_all('java');
It seems to me when I try them they do exactly the same, is that correct?
Second, more important question. If I want to make an int variable that refers to the index number of an array, how do I write? For example if we have
Java Code: String[] string = new String[10]; mh_sh_highlight_all('java');
And I want to have a variable "int n" that refers to an index number, so that if I set n = 5 then string[5] is selected. Note that the int n is NOT an array, but just a regular integer variable. How can I do that?
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Nov 7, 2014
I`m trying to make a gradebook that uses random number generator to give the score, I also need to implement student numbers and sort everything with a total at the bottom. But I cant figure out how the bubblesorting works. This is my code so far:
package karakterbok;
import static java.lang.Math;
import java.util.Random;
public class Karakterbok {
public static void main(String[] args) {
Random karakterer = new Random();
Random studid = new Random ();
[Code]...
how to sort this using bubblesort?
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Jun 8, 2014
im trying to make a linear search method to check if a number 'n' is included in an array.
PHP Code:
package test;
public class Recursion {
public static void main(String[] args) {
}
static int linearSearch(int n, int[] array)
[code]....
Im getting the following error: this method must have a result type of type int ?? i already have a return type of type int...
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Mar 14, 2009
hey just having some trouble with a homework question:
For this question you will use the Point class from the Java API, which represents points in 2-dimensional space, each of which has an x and y coordinate. You must write a program called Distance, which does the following:
1. Reads in the coordinates (separated by spaces) of two points
2. Creates two Point objects with the values entered by the user
3. Uses the distance method of the Point class to calculate the distance between the two points
4. Prints out the distance
Details on how to create Point classes can be found in the Java API documentation. However, for this question the only two methods you need to know about it are the following:
- Point(int x, int y) - Constructor; creates a new point
- double distance(Point other) - Calculates the distance between this point and another point
I think what i have so far will work, im jsut having problems creating 2 new objects . it points at new and says incompatible types. And also points at +distance and says cannot be de reference from a static context.
import java.awt.Point;
import java.util.Scanner;
public class Distance{
private int pointX;
private int pointY;
private double distance;
public Distance(int x,int y)
[Code] .....
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Mar 17, 2015
I am working on this new project where we are using the great distance formula but every time I run my ending result is NaN. I was researching, and people say its because you divide by 0. I think I have my formula correct.
Java Code:
public class testingFormula {
public static void main(String[] args) {
double lat = 34.01858902;
double lon = -118.2817688;
double lat2 =33.94530869;
double lon2 = -118.3994904;
[Code] ....
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Nov 25, 2014
I'm trying to write a program that will takes as input a sub-sequence/set/query eg; P = <1,3,0>)
int [][] S = {{1, 3, 0}};
and a list of series. eg;
int [][] T = {{1, 2, 3, 0, 1, 5},{9,9,9,9,9,9}};
The idea is to iterate through the series and find the lowest distance, using euclidean distance, between a subseries and the query.Example: d=distance d(P,T[1..3]=√(1-1)^2 + (3 - 2)^2 + (0 - 3)^2 = sqrt10 => 3.16...Then go through the first subseries again but starting at [1] in the array instead of [0], so d(P,T[2..4]=√(1-2)^2 + (3-3)^2 + (3-0)^2. keep repeating this process, then start searching the next subseries for the lowest distance, save the position of index(row#) and the start of the subseries(column#) that has the lowest distance.Here is the code i have written to do this without using nested for-loops to do it:
//Works out euclidean difference, long way need for loops
int [][] T = new int [][] {{1,2,3,0,1,5}};
int [][] S = new int [][] {{1, 3, 0}};
int s1 = S[0][0]; int s2 = S[0][1]; int s3 = S[0][2];
int t1 = T[0][0]; int t2 = T[0][1]; int t3 = T[0][2];
double sum;
sum = Math.pow((s1 - t1), 2);
sum += Math.pow((s2 - t2), 2);
sum += Math.pow ((s3 - t3), 2);
Double diff = Math.sqrt(sum);
System.out.println(diff);
}
However i want to use for-loops to iterate through as subseries could be of any length. The way i did it above isn't applicable.This is what i have so far...
int [][] S = {{1, 3, 0}};
int [][] T = {{1, 2, 3, 0, 1, 5},{9,9,9,9,9,9}};
int
[code]...
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May 14, 2014
you need to find out the distance between two trains using only two commands
mf - move forward
mc - move backward
the trains are dropped using helicopter by parachutes . both doesn't know where they are; no gps in the train they are in the same track
write a code to find the trains using the given commands
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Feb 20, 2015
Write method distance, which calculates the distance between two points (x1, y1) and (x2, y2). All numbers and returned values should be of type double. Incorporate this method into an program that enable the user to enter the coordinates of the points, then calculate and display the distance by calling the method –distance.
I've tried numerous times to make it work and I'm on the right path, however I'm missing some things in the code to make my results look like this later on, which I've attached onto this post.
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Sep 19, 2014
Pretty much what im trying to accomplish, i need to write a program that figures out the distance between one point to another, using miles and feet..
Heres how it has to look: "The distance from my uncles house is ___ miles, or ____ feet."
I can get it to run if i add only whole miles..but when i try to add 8.5 miles, and compile, the program flips out..I know i need to use a double somewhere, but cant figure it out, here is my code..
import java.util.Scanner; //required for input
public class feetToMiles {
public static void main (String[] args){
//Create new scanner object called input
Scanner input = new Scanner (System.in); //allows for input
[Code] ....
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Mar 13, 2015
I need to modify the drawShape method to calculate the distance from the starting point (the diameter) of any shape regardless of how many sides I give it, but I have absolutely no clue where to begin with this. The ultimate goal of the program is to calculate the value of pi using the shape that is drawn.
Here is the code:
public class PiTurtle extends Turtle
{
private double mySize;
private int mySides;
private double diameter = 0;
final static double startX = 590.0;
final double startY;
public PiTurtle(int nSides)
[Code] .....
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Apr 18, 2015
What ever positive value which has multiples keeps on displaying " No multiples ........ where found, and the answer.how can i fix the colored part ?
import java.util.Scanner;
public class Problem4 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n;
boolean x=true;
System.out.print("Enter an integer n: ");
n=input.nextInt();
[code]....
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May 1, 2015
Write a program that draws 20 circles, with the radius and location of each circle determined at random...... Two circles overlap if the distance between their center points is less than the sum of their radii...
There may be many problems with the code in general but what I'm struggling with is the distance and the totalradius portion. Visually, its inaccurate.
import java.awt.*;
import javax.swing.*;
public class CircleTest extends JPanel {
Circle []circles;
Circle []circleCenter;
Circle []all;
private int distance, totalradius, dx, dy;
private int radius,x,y;
[Code] ....
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Apr 3, 2014
When an object is falling because of gravity, the following formula can be used to determine the distance the object falls in a specified time period:
d = 1/2 gt^2
The variables in the formula are as follows: d is the distance in meters, g is 9.8, and t is the amount of time, in seconds, that the object has been falling.
Write a method named FallingDistance that accepts an object's falling time (in seconds) as an argument. The method should return the distance, in meters, that the object has fallen during the time interval. Demonstrate the method by calling it in a loop that passes the values 1 through 10 as arguments, and displays the return value.
import java.util.Scanner;
import java.text.DecimalFormat;
public class FallingDistance
{
public static void main(String[] args) {
DecimalFormat num = new DecimalFormat("#,###.00");
Scanner keyboard = new Scanner(System.in);
double fallingTime;
[Code] ....
My program runs, but no matter what falling time I enter, I get the same numbers. What am I doing wrong?
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Apr 10, 2014
I'm having trouble formatting my output and issues with the decimal places. Here's my code:
import java.util.Scanner;
import java.text.DecimalFormat; // Imports DecimalFormat class for one way to round
public class lab3 {
public static void main(String[] args) {
String heading1 = "Hour", heading2 = "Distance Traveled";
int timeElapsed, hour, speed;
[Code] ....
And here's my output (Click on the image since it's pretty small):
javaIssues.png
Issue:
1) The Hours 2 and 3 aren't aligned to 1.
2) The 80 and 120 in Distance Traveled have 6 decimal places when it should not have decimals.
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Mar 13, 2015
I need to modify the drawShape method to calculate the distance from the starting point (the diameter) of any shape regardless of how many sides I give it, but I have absolutely no clue where to begin with this. The ultimate goal of the program is to calculate the value of pi using the shape that is drawn.
Java Code:
public class PiTurtle extends Turtle
{
private double mySize;
private int mySides;
private double diameter = 0;
[code]....
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Sep 27, 2013
I have been having difficulty with the weeks concepts in my online Java class, the program is to be as followed:
For this exercise you will implement a class called Pair, that represents a pair of two numbers.The Pair class should include the following constructor and methods:
CONSTRUCTORS
public Pair(double num1, double num2) -- Creates an object that represents a pair of double values
METHODS
public double getAverage() -- Returns the average value of the two numbers
public double getDistance() -- Returns the absolute vale of the distance between the two numbers
public double getMaximum() -- Returns the maximum value of the two numbers
public double getMinimum() -- Returns the minimum vale of the two numbers
Write a class called PairTest that tests your Pair implementation. The PairTest should prompt the user for the two values, create a Pair object with the values and then print the average, distance, maximum, and minimum of the pair. The input / output should look like the following:
Enter the first number: 5.5
Enter the second number: 3.0
Average: 4.25
Distance: 2.5
Maximum: 5.5
Minimum: 3.0
NOTE: For this exercise, your solution should not use any conditional statements. Instead you should use the methods provided by thejava.util.Math.
So far I have:
import java.lang.Math;
import java.util.Scanner;
public class Main
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
{
System.out.println("Please enter a value for the first number");
[Code] ....
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Feb 1, 2015
Basically I'm looking for a way to make one object follow another. For example, if I move object A to one area of the screen I want object B to to move to object A's location but I also want object B to move at a fixed speed (movement variable). How do I go about doing this?
Both the x and y coordinates of object B would need to know the coordinates of object A to calculate the distance between the two and to determine how much of which axis to increment/decrement (if that makes sense?) with the inclusion of the speed variable. In other words I'm just trying to create a homing object.
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Feb 4, 2015
The program work somehow, but it can't count the first input when user key in.
import java.util.Scanner;
public class DetermineValues {
public static void main( String[] args ) {
int sum;
int minus;
int data;
[code]....
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Feb 7, 2015
I have a problem where I am trying to re arrange the values in an array from negative to positive. I have it re arranged but I cannot figure out how to re arrange them in numerical order. I have to use O(n) and O(1) operations.
Java
import java.util.Arrays;
public class Task7 {
public static void main(String[] args){
int[] numbers = {-19, 6, 34, -3, -8, 23, 5, 678, -45, -12, 76}; //array of positive and negative numbers
int next = 0; //in no particular order
[Code] .....
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Apr 13, 2014
I am trying to write a loop that calculates the distance traveled (distance = speed * time). It should use the loop to calc how far the vehicle traveled for each hour of time. My program asks for hours and then mph but its not calculating time * speed. Here is my code.
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter Hours Traveled ");
int hoursTraveled = input.nextInt();
System.out.println("Enter MPH ");
int mph = input.nextInt();
[Code] .....
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