Nth Square Root Of Any Number

May 14, 2009

This is a mathematical problem. I got one of the equations I need to compute down to

n^(1/6)

Or the 6th root of n.

Now the Java code I have for this is as follows, since Java has no nth root function I'm raising it to a power of a 1/6.

System.out.println(Math.pow(64.0, 1/6));

Now, the only thing it will print is 1.0

However the 6th root of 64 is 2!!!!

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How To Compare Square Of The Square Root Of Any Number

Feb 20, 2014

How would I compare the square of the square root of any number. The difference in these values is due to the rounding error in Java.

Example: Enter number 2

The answer I should get is: 2.000000000000004
Round off error: -4.440892

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Creating Method That Prints The Square Root Of A Number Up To A Certain Number?

Feb 27, 2015

I am trying to create a method that prints the square root of a number up to a certain number. It needs to take a single int parameter for example "n" , and then print all of the (positive) even perfect squares less than n, each on a separate line. I want the method to be called something like this:

public void Squares(int n) {
}

I need the output to look something like this:

Example: if n = 40, your code should print

4
16
36

So I have been working for a few hours now and am really stuck.

This is what I have so far:

int count = 0;
int n = 4;
int max = n;
while(count < max) {
System.out.println(n);
n = n * n;
count++;

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Sep 2, 2014

Some algorithm in computing the square root of a number without using any loops?

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Jan 3, 2015

My code compiles and runs just fine, i'd just like to get creating a small square box that shows number of words used next to the "word count = ". i'd wanto to press the count words button to count and show the number in the square box. here is my code.

import javax.swing.*;
import javax.swing.text.*;
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
public class wordCount extends JFrame implements ActionListener

[Code] .....

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Jan 27, 2014

1. Land Calculation

One acre of land is equivalent to 43,560 square feet. Write a program that calculates the number of square feet in a tract of land with 3.5 acres. Hint: Multiply the size of the tract of land (in acres) by the number of square feet in an acre to get the number of square feet in the tract.

a) You must have a variable called nrAcres where you will store the number of acres in the track.

b) Output must look as follows:

Size of land in acres: 3.5
Size of land in square feet: 152460

c) if the value of the variable nrAcres is changed the output should change accordingly. In other words: it would be wrong to have the following statement:

System.out.println("Size of land in square feet: 152460");

previous statement will print the correct output but will not change if you change the value of nrAcres.

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Calculate Number Of Square Feet In A Tract Of Land With 3.5 Acres

Jan 27, 2014

Land Calculation

One acre of land is equivalent to 43,560 square feet. Write a program that calculates the number of square feet in a tract of land with 3.5 acres. Hint: Multiply the size of the tract of land (in acres) by the number of square feet in an acre to get the number of square feet in the tract.

a) You must have a variable called nrAcres where you will store the number of acres in the track.
b) Output must look as follows:

Size of land in acres: 3.5 Size of land in square feet: 152460

c) if the value of the variable nrAcres is changed the output should change accordingly. In other words: it would be wrong to have the following statement:

System.out.println("Size of land in square feet: 152460");

previous statement will print the correct output but will not change if you change the value of nrAcres.

this is what i got so far

public class Land
{
public static void main(String[] args){
double nrAcres = 3.5;
int feetInAcre = 43560;
double feetInTract = nrAcres * feetInAcre;
System.out.println("Size of land in acres: " + nrAcres + "
Size of land in square feet: " + feetInTract);
}
}

i tried to compile it but it says

error: class names, Land, are only accepted if annotation is explicitly requested 1 error

what is wrong with my code

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Aug 31, 2014

I'm trying to create a cursor for a game that moves square by square. While it will move to the next square, though, it leaves the image of the previous cursor on the last square it was on.

As a visual explanation, this is what the program looks like on launch:

This is what it's suppose to look like after you press the right arrow key once (made by forcibly changing launch coordinates):

And this is what it actually looks like after you press the right arrow key once:

Here is the code for the program:

package cursortest;
import javax.swing.*;
import java.awt.*;
import javax.imageio.*;
import java.io.*;
import java.awt.event.*;
public class CursorTest extends JPanel implements KeyListener{

[Code] ......

I'm fully aware that I could just use g.clearRect on the area and remove it for sure, but I know for a fact I shouldn't have to as I have another program I made a long time ago that tried to do something similar without needing to resort to that.

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Dec 1, 2014

I have this mapping:

<servlet>
<servlet-name>wsdl</servlet-name>
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</servlet>
<servlet-mapping>
<servlet-name>wsdl</servlet-name>
<url-pattern>/wsdl</url-pattern>
</servlet-mapping>

And this works fine: URL....The war file is deployed under the context root /bankconnect/ I want to make a servlet mapping, before the context root "i still want the context root bankconnect". URL....

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May 8, 2014

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May 12, 2014

I like to know how to write root function in java applet. I know it in java function. Ex:

import java.lang.*;
public class Maths {
public static void main(String[] args) {
// get two double numbers numbers
double x = 9;
double y = 25;
// print the square root of these doubles
System.out.println("Math.sqrt(" + x + ")=" + Math.sqrt(x));
System.out.println("Math.sqrt(" + y + ")=" + Math.sqrt(y));
}
}

working fine. but If I tried in applet it's not working. Ex:

evap_trans = 0.0135 * SRAD * ( TMEAN + 17.78) * Math.sqrt(TMAX - TMIN);

If I execute above said formulae with out "Math.sqrt" results are ok. If I used then results shows ZERO.

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Jul 1, 2014

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If I copy the file Into my root folder and use CLASSPATH: sqljdbc4.jar It works fine.

Class-Path: sqljdbc4.jar
Main-Class: com.ncntech.go

If I try CLASSPATH: C:Program FilesMicrosoft JDBC Driver 4.0 for SQL Serversqljdbc_4.0enusqljdbc4.jar I receive a "Could not find or load main class" error.

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Is the syntax correct for specifying a directory path ?

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Mar 16, 2015

When I map my servlet to the ROOT of the site, the javascript, CSS and image files are not served. The conversation between the server and browser shows the files are being sent, but they are not rendered in the browser. This happens in both Firefox and Chrome.

If I change the mapping to anything other than the root, such as /x/, everything works as it should.

Here's my web.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
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[Code] .....

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whateverMyDeploymentDirectoryIs/files/pdfs

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Apr 13, 2014

The problem I'm having is when the text box pops up and ask to start with a root name, I cannot enter anything and I am not sure what I have done wrong.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class FamilyTreeDemo extends JFrame

[Code] ....

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Jan 10, 2015

I need to make some operations with a file. I struggle to understand why Apache is throwing this error:

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My file is located in the root directory of the project.

And here is how I indicate the path to it:

String filePath = "default.jpg";
InputStream inputStream = new FileInputStream(new File(filePath));

If I put the file in the Eclipse folder, it works... But I need it to work if I put it in my project's root folder.

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Nov 25, 2014

I'm having a small issue with my output on my code. here is what my output is: The magic value for your square is 34, which means that every row, column and diagonal of your square must add up to that number.

Please enter the 4 values for row 0, separated by spaces: 1 2 15 16
Please enter the 4 values for row 1, separated by spaces: 13 14 3 4
Please enter the 4 values for row 2, separated by spaces: 12 7 10 5
Please enter the 4 values for row 3, separated by spaces: 8 11 6 9
Checking square for problems:
DIAG: VALID
ROWS: VALID
COLS: VALID
RANG: VALID
MAGIC: No

MAGIC should be YES. However i keep getting it saying no.This is the correct output..The magic value for your square is 34, which means that every row, column and diagonal of your square must add up to that number.

Please enter the 4 values for row 0, separated by spaces: 1 2 15 16
Please enter the 4 values for row 1, separated by spaces: 13 14 3 4
Please enter the 4 values for row 2, separated by spaces: 12 7 10 5
Please enter the 4 values for row 3, separated by spaces: 8 11 6 9

Checking square for problems:
DIAG: VALID
ROWS: VALID
COLS: VALID
RANG: VALID
MAGIC: YES

Here is my code..

import java.util.Scanner;
public class pdonahue_Magic {
public static void main(String args[]) {
int[][] theSquare = new int[4][4];
Scanner s = new Scanner(System.in);
System.out.println.

("The magic value for your square is 34, which means that every row, column and diagonal of your square must add up to that number.");

System.out.print("Please enter the 4 values for row 0, separated by spaces: ");
theSquare[0][0] = s.nextInt();
theSquare[1][0] = s.nextInt();
theSquare[2][0] = s.nextInt();
theSquare[3][0] = s.nextInt();

[code]....

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Oct 17, 2014

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*****
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*.....*
*.....*
*****

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*****
* *
* *
* *
*****

Code:

class Main {
public static void main( String args[] ) {
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[Code] ....

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I found two ways of solving this but i think both are way inefficient :

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Methods:
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addMatrix() - receives a matrix object. adds its myMatrix with the received object's myMatrix. The result is placed in this object's myResultMatrix.
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I typed up this code but I'm not sure about some parts of it and I would creating min and max values in the Random method and in the main printing the separate 2 matrices and adding and subtracting them:

import java.util.*;
public class SquareMatrix2 {
public int size;
public int myMatrix [][];
public int myResultMatrix;
public int [][] ResultStatus;

[Code] ....

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}
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I come to the point: I just started to learn java through various manuals and in one of them I came across a declaration of an array that I do not understand:

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.*.*.
..*..

My java code print this:

..*..
.***.
*****
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Here is my code:

class Main {
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*****
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but then in the main method, it should draw multiple squares of given sizes, so say 5, 6, and 7. Making a square for each of the given numbers. This is what I currently have so far ....

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