Write a Java program that calculates the area and volume of a cube, sphere, cylinder, and regular tetrahedron. Your program should obtain the necessary input for each of the objects from the console and output the input, area, and volume of the object. Use appropriate messages to guide the user of your program.
View RepliesWrite a Java program that calculates the area and volume of a cube, sphere, cylinder, and regular tetrahedron. Your program should obtain the necessary input for each of the objects from the console and output the input, area, and volume of the object. Use appropriate messages to guide the user of your program.
Here what i did, i am not sure if this is what the assignment want, but this is the best method i could come up with
//Khang Le
import java.util.Scanner;
public class InputAreaVolume {
public static void main(String[] args) {
[Code]......
How do you use power of math. I'm trying to write a calculator to calculate the volume of a cylinder by asking the user to enter the height and radius but when I use pow(2) it doesn't work. I imported java.lang.math class so i dont have to keep using math. for now my code runs just fine since I'm using radius * radius but I would really luv to use the power instead times each other when i have to use higher powers.
import java.util.Scanner;
import static java.lang.Math.*;
public class Lab2 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
[Code] .....
My homework is to find the surface area and volume of a cone. I have 2 individual java program for the homework and one them already works.
public class Cone {
Cone() {}
double r, h;
double volume() {
return (1.0 / 3.0) * Math.PI * r * r * h;
[Code] ....
The second one I keep getting error mainCone.java:22: error: reached end of file while parsing
public class Conemain {
public static void main(String [] args) {
Cone = new Cone();
Cone.setR(5);
Cone.setH(8);
[Code] ....
I need fixing the second one in order to find the surface area and the volume for cone.
My program never compiled. the code is for a dialog box that calculates the volume of a cylinder, and i know there are simpler codes to do it, but this is the format my teacher wants...Heres the code:
import javax.swing.*;
public class classTwo
{
public static void main(String[] args)
{
String rad, hei, vol;
Scanner joe = new Scanner(System.in);
System.out.println ("Hi, please enter a radius.");
double rad = joe.nextLine();
System.out.println ("Enter a height.");
[code]....
I am doing exercises which has to do with the area of regular pentagon.
(Geometry: area of a regular polygon) A regular polygon is an n-sided polygon in which all sides are of the same length and all angles have the same degree (i.e., the polygon is both equilateral and equiangular). The formula for computing the area of a regular polygon is :
I have checked errata on their page and they did not list the type-o under the final result.
Errata link [URL] ....
their result is
Enter the number of sides: 5
Enter the side: 6.5
The area of the polygon is 74.69017017488385
and mine is Area of regular pentagon is 72.69017017488385
is it a code error?
import java.util.Scanner;
public class AreaOfAregularPolygon4_5 {
public static void main (String[] args){
//Initiate scanner and use the input
Scanner input = new Scanner (System.in);
System.out.println(" Enter the number of sides in polygon");
[Code] ....
I'm starting with my version of very basic program: calculating area of circle. And of course it doesn't get well. My question: what is wrong in this code?
public class circleAre{
double radious;
void putData(double radi){
radi = radious;
[Code] .....
package areatest;
import javax.swing.JOptionPane;
public class AreaTest {
public static double areaTriangle (double length, double width){ //How to calculate the area of a triangle
return .5f * length * width;
[Code] .....
When I try to get the area of a rectangle it gives me 9 no matter what input I give it. When I try to get the area of a triangle it gives me .5 no matter what input I give it. Same with the circle but it always gives me 12.56370...
I am doing an assignment that is asking for the user to put in the radius of a circle and the program figures out the area, diameter and circumference. It is using 2 different java programs to accomplish this. One with the info on how to get area, diameter and circumference and one is the demo that runs the program. I keep getting errors on my demo.
// Circle Class
public class Circle {
private double rad;
private double Pie;
private double area;
private double diameter;
[Code] .....
Basically its a program where a user is prompted to enter the length of all three sides of a triangle and the program calculates the area by herons formula and can tell if the triangle is equilateral or Pythagorean. I am having trouble entering a formula to where all three enter sides cant possibly be a triangle. Here is my Program. Where the '?' is stated.
import java.util.Scanner;
public class Triangle {
public static void main(String[] args){
double a;
double b;
double c;
double s;
double x;
double area;
[Code] ....
Create a program to input the length and width of a rectangle and calculate and print the perimeter and area of the rectangle. To do this you will need to write a Rectangle class and a separate runner class. Your program should include instance variables, constructors, an area method, a perimeter method, a toString method, accessor and mutator methods, and user input. Your runner class should include 3 Rectangle objects. One default rectangle, one coded rectangle, and one user input rectangle. All methods should be tested in the runner class.
This is my code:
import java.util.Scanner;
public class Rectangle {
double length;
double width;
public Rectangle() {
[Code] ...
What have I done??? I have created this program using the few different resources with which I am supplied, but I don't understand the resources.
I am trying to make a program so that the user has to enter a number for the width and length and it will give the area and perimeter:
import java.util.* ;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class jframe extends JFrame {
private static final int WIDTH = 400;
private static final int HEIGHT = 300;
[Code] ....
It is giving me an error saying that the ExitButtonHandler and ebHandler do not have classes but I don't understand why.
I'm new to Java and I have an assignment to create a Sphere class that will allow you to create Sphere objects using the code below. Then create a program called SphereTester that prompts the user for the radii of two spheres in meters. The program should display which sphere is larger and by how many cubic meters and display only four digits after the decimal point. I have the sphere class given to us for the assignment which is this:
Java Code: public class Sphere {
// instance variable (i.e., a field)
private double radius;
// constructor for the Sphere class
public Sphere(double r) {
radius = r;
[code]....
I am having issues with my code for my class. Everything is working except that when I add all "userData" it will only populate the last data entered. My professor said that I have brackets in the wrong spot within my FOR loops but for the life of me can't figure out where. I have tried almost everything from removing most of the brackets, to just keeping the first FOR loop and removing the second one. That kind of worked except I got the output after each cylinder data was inputted instead of at the end which kind of defeats the purpose.
First Class SNIPPET:
public void cyl()
{
CylinderTest.height=height;
CylinderTest.radius=radius;
[code]...
I have an assignment to create a Sphere class that will allow you to create Sphere objects using the code below. Then create a program called SphereTester that prompts the user for the radii of two spheres in meters. The program should display which sphere is larger and by how many cubic meters and display only four digits after the decimal point. I have the sphere class given to us for the assignment which is this:
public class Sphere {
// instance variable (i.e., a field)
private double radius;
// constructor for the Sphere class
public Sphere(double r) {
radius = r;
[code]....
Here is a sample run of what the final result should look like
Enter the radius of a sphere (in meters): 1
Enter the radius of a 2nd sphere (in meters): 2
Sphere 2 is greater than Sphere 1 by 29.3215 cubic meters
So I've been working on this sphere class forever and have tried rewriting it a number of times. each time i change something i get a different error...
Instructions: create a sphere class with the following properties:
private attributes: x, y, z coordinates of center, and the radius.
Accessor and mutator methods to: set and get the x,y,z coordinates, set and get the radius, get the volume and surface area of the sphere.
This is the main sphere class:
Java Code:
package spheretester;
<pre class="brush:java;"> */
import java.io.*;
import java.util.Scanner;
public class Sphere {
public static void main(String[] argv) throws Exception
[Code] ....
I have to write programs using inheritance and got everything working but need to set a value for side1 in the cube class.
public class Cube extends ThreeDimensional{
public Cube(){
super();
} public double setOneSideofCube(){
//side1 = setOneSideofCube();
return side1;
[code]....
I am trying to print out a rubix cube nicely so that it looks something along the lines of this:
** ** ** R1 R2 R3 ** ** **
** ** ** R4 R5 R6 ** ** **
** ** ** R7 R8 R9 ** ** **
B1 B2 B3 Y1 Y2 Y3 G1 G2 G3
B4 B5 B6 Y4 Y5 Y6 G4 G5 G6
B7 B8 B9 Y7 Y8 Y9 G7 G8 G9
** ** ** O1 O2 O3 ** ** **
** ** ** O4 O5 O6 ** ** **
** ** ** O7 O8 O9 ** ** **
** ** ** W1 W2 W3 ** ** **
** ** ** W4 W5 W6 ** ** **
** ** ** W7 W8 W9 ** ** **
however, when I try to print out the entire cube, I get this:
** ** **
** ** **
** ** **
R1 R2 R3
R4 R5 R6
R7 R8 R9
[code]....
I have found out the area that causes this, my toString, but I want to know if there is something built in or not that will allow me to print it such that I can continue printing it at the same row level as its neighbor, even though I create a new line for each individual column? Here is the code that I try to print out the entire cube:
void printEntireCube(){
for(int row = 0; row < 4; row++){
for(int col = 0; col < 3; col++){
System.out.print(cube[col][row] + " ");
}
System.out.println();
}
}
void createCube(){
[code]....
import java.awt.*;
public class Exercise5 {
public void paint(Graphics g) {
g.drawRect(30, 50, 50, 50);
g.drawLine(30,50,40,40);
g.drawLine(80,50,90,40);
g.drawLine(40,40,90,40);
g.drawLine(80,100,90,90);
g.drawLine(90,40,90,90);
}
public static void main(String args[]) {
}
}
I got how to create the cube, but how do i loop the drawline? I am supposed to only have one ?
I want to get the max volume from a file that I stored in an arraylist but it don't know if this is the way to do it. also I don't know how to print the method in the main method. here is the method that will get the max volume
public Shape3D maxVolume(ArrayList<Shape3D> shapes ){
Shape3D currentMax;
int currentMaxIndex = 0;
for ( int i = 1; i < shapes.size(); i++)
[Code] ....
This is my shape3D class
public abstract class Shape3D implements Comparable<Shape3D>
{
private String type;
public double radious;
public double height;
[Code] ....
We are doing a visualisation tool for point cloud research project. We use 3d sphere to represent each single point and when we have large number of points to display (~40,000), the rotation becomes very lagging.
What we have tried:
set JVM flag -Djavafx.animation.fullspeed=true, this worked a bit, but not significant.set JVM flag -Djavafx.autoproxy.disable=true, this did not work.
set Cache to true and CacheHint to Cache.SPEED, this did not make much difference.create another thread to do the rotation, and sync back after calculation, this did not work neither.
I am currently building a java music player and need getting the volume control to work. I want to be able to set the computers volume directly using an integer. I've created a slider and put the value into an integer. The part that I am having trouble with is getting the volume to work.
View Replies View RelatedMy question is, how do I get my Cube to visualize in the JPanel? I've tried a bunch of add methods but they don't compile. Is there a proper method I can use to add an object to a JPanel?
import javax.swing.*;
import java.awt.Dimension;
import javax.swing.Timer;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.*;
[Code] ....
I need to work on this "Dice" program. I've done it twice already. I've also been pouring over examples on here and elsewhere online, but none of them exactly match what I'm doing, as they all say "Pair of Dice".Mine says: "Create a class called Dice to represent a SINGLE cube". It should have a method called roll() that randomly selects a number from 1-6 for the value of the dice."
It has to use java.util.random, not math.java, and it has to have numberShowing:int, roll():int, and main() all in it.The last part reads "Create a test main method for the Dice class that creates a dice and rolls it many times. Can you keep track of how many times a number comes up? Describe how or implement it in the program." I have started at this computer for hours, and read as much info as I can.
I do not understand the getActionCommand and ActionListener concepts. This code does not resolve the volume for length, width, and height.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import java.awt.Container;
public class rectangularSolid extends JApplet implements ActionListener {
[Code] ....
I am supposed to write a Tester to get the current volume of a balloon that starts with a radius of 0 after it is inflated.This is the balloon:
public class Balloon
{
private double savedRadius;//instance variable
/**constructor!!
Constructs a balloon with a radius
*/
}
[code]....