Calculate Distance From Starting Point Of Any Shape
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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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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Oct 18, 2014
I've just been having a go at an exercise where I have to create and use a class called Point, with two fields of type double. I have to create some methods for it, one of which is a distanceTo(Point) method, that calculates the distance to another point. I've tried to keep the distanceTo(Point) method short so have created some other methods to use within the method. My question is about the getDistance() method that I've made. As you can see below, I've given it two parameters, which are references to values within two Point objects (this.x and otherPoint.x).
double distanceTo(Point otherPoint) {
double distanceX = getDistance(this.x, otherPoint.x);
double distanceY = getDistance(this.y, otherPoint.y);
return calculateLength(distanceX, distanceY);
}
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Jan 28, 2015
I want to read a text file from the starting point to end of the file.
BufferedReader read=new BufferedReader(new FileReader("C:/eGurkha/agent/sample/UptimeRecord.txt"));
String line=read.readLine();
while (line != null)
{
System.out.println("lines are :"+line)
line=read.readLine();
}
By using the above code I can read all the line from the file, But I want to read from the some starting point.
For example : I have a file with 100 lines, from that file I want to read lines from 53 upto end of the file.
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Apr 23, 2014
I am working on a simple app that should emulate a desktop with some icons that you can drag around. I was instructed to use the MouseListener and MouseMotionListener. The icons should drag starting at the point where the mouse originally clicked down on it (ie not dragging from the top right corner).
I am drawing my icons to a jpanel, and I seem to be having two problems:The hitboxes are offThe icon is being dragged from the top right corner, despite having setup up a mouse offset at the beginning of the drag..Here are the relevant classes, the Desktop.draw() method is being called from my DrawPanel
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Desktop implements MouseListener, MouseMotionListener{
static DesktopIcon[] icons;
[code]...
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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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Apr 8, 2015
I create a shape then, them translate shape to another place, how I teste if a point is inside the shape?
Rectangle rect = new Rectangle(20, 20, 100, 100);
rect.contains(21, 21); // returns true
rect.setTranslateX(200);
rect.setTranslateY(200);
rect.contains(21, 21); // returns true!!!
rect.contains(201, 201); // returns false
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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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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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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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Jul 8, 2014
Write method distance to calculate the distance between two points (x1, y1) and (x2, y2). All numbers and return values should be of type double. Incorporate this method into an application that enables the user to enter the coordinates of the points.
Hints:
- The distance between two points can be calculated by taking the square root of
( x2 - x1 )2 + ( y2 - y1 )2
- Use Math class methods to compute the distance.
- Your output should appear as follows:
Type the end-of-file indicator to terminate
On UNIX/Linux/Mac OS X type <ctrl> d then press Enter
On Windows type <ctrl> z then press Enter
Or Enter X1: 1
Enter Y1: 1
Enter X2: 4
Enter Y2: 5
Distance is 5.000000
Type the end-of-file indicator to terminate
On UNIX/Linux/Mac OS X type <ctrl> d then press Enter
On Windows type <ctrl> z then press Enter
Or Enter X1: ^Z
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Mar 26, 2014
I want to write a Utility to calculate the shipping charges based on the product weight in pounds and distance in miles. How we can go about it.
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Sep 17, 2014
This program is for a swimming pool filling service company. They charge 2 cents per gallon and $50 per hour to fill a pool. The truck can fill at a rate of 730 gallons per hour.
Create the Pool class that calculates the cost to fill a pool based on it's Shape, length, width and depth. (Input order is S L W D)
The pool class will need data fields for String shape, double length, double width, double depth, static double GallonsPerSqFoot = 7.4805, static double price per gallon = .02, static double FillingFeePerHour = 50.0, and static double FillingRate = 730gal/hr.
Create a No-Arg constructor and a constructor that accepts the non-static values, and has the methods: getShape, getLength, getWidth, getDepth, getGallons, getHours, getFillingFeePerHour, getHourlyCost and getTotalCost.
At the end of the class, create a main() method that asks for the input and returns the output based on the Pool class gets.. methods.
The shape options are oblong or rectangle. (A round pool would be oblong with the same width and height, a square pool would have the same width and height)
Formulas:
Rectangle cubic ft = length * width * depth.
Oblong cubic ft= ((Math.PI * Math.pow(width/2,2)* depth) +((length-width) * width * depth))
Gallons = cubic ft * 7.4805.
hours = total gallons/730.
Total cost = (total Gallons * .02)+(hours * $50)
Example Output
An oblong pool 18.00 feet long by 12.00 feet wide and 5.00 feet deep will use 6923.10 gallons of water and take 9.48 hours to fill. The total cost will be 612.65.
Here is my code:
import java.util.Scanner;
import java.util.*;
public class Pool
{
private String poolshape1 = "oblong";
private String poolshape1 = "rectangle";
private double length;
private double width;
private double depth;
private static double GallonsPerSqFoot = 7.4805;
[Code] .....
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Mar 14, 2014
Write a java program that calculate the grade point of three subjects and their credit hours through if the grade points and the credit hours are
Subject---grade---gradepoint-----credit hours
Maths------A--------4.0---------3
English composition-----B-------3.0-----2
French-----B+ ---- 3.3----------3
Now,if the grade point is equal to 4 ,print out First class
If the grade point is equal or greater than 3.0 but less than 4,print out Second class upper
If the grade point is equal or greater than 2.0 but less than 3,print out second class lower
Use the if-else-if statement
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Jun 5, 2014
I was reading the oracle java tutorial under: URL....Here's the code for the Point class:
public class Point {
public int x = 0;
public int y = 0;
//constructor
public Point(int a, int b) {
x = a;
y = b;
}
}
and in the Rectangle class you have the following constructor:
public Rectangle(Point p, int w, int h) {
origin = p;
width = w;
height = h;
If we create a new Point object like this:
Point originOne = new Point(23, 94);
and then a new Rectangle object like this:
Rectangle rectOne = new Rectangle(originOne, 100, 200);
Will that set originOne to point to the object Point at (23, 94). just want to make that this is the meaning of this statement: Point(Point p)Constructs and initializes a point with the same location as the specified Point object.
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May 12, 2014
What is the starting index for linked list, 0 or 1. I know an array starts at 0 so wouldn't a linked list?
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Feb 9, 2015
I just went through some multiple choice questions and found this question with the below choices,
a) It is not standardized
b) To avoid conflicts since assemblers and loaders use such names
c) To avoid conflicts since library routines use such names
d) To avoid conflicts with environment variables of an operating system
Now , what should be the explanation for answering such question.
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Apr 15, 2014
I want to find a certain element in array I have to scan through the array index starting from 0 until I find the number I am looking for. Even in data structures which use hashing like HashMap and Hashtable we will have to scan through the keys until we find the key we are looking for. So what is the use of hashing over index based searching? I mean how is hashing an advantage over an array?
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Jul 24, 2014
I'm trying to create a Label using AWT (not swing) that is invisible on startup but shows up when pressung a button. Here's the relevant code:
Label:
updated = makeConfirmedLabel("Updated!");
updated.setVisible(false);
Button:
update = new Button("Update");
update.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
MainComponent.updateComponents();
System.out.println(updated.isVisible());
updated.setVisible(true);
System.out.println(updated.isVisible());
}
});
When I press the button I get the following output in console:
false
true
If I start with setVisible(true) and use updated.setVisible(!updated.isVisible()) it works fine. Why can't I start with it hidden??
I tried to use updated.revalidate() after setting it visible. That made it work but it makes the whole UI flicker when pushing the button which isnt desired.
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Jul 14, 2014
Now I am doing dictionary app using files..
Here i want to print the String from Starting character which is given by user..Here i given below the image like my concept..here we put .(dot and enter R)eclipse will print the method name which is starting from R..
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Jun 24, 2015
This screen appears for a second and after this, it shows up normal app screen. How I can solve this issue? When I open app: after this
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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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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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