Simple Program Giving Negative Result For Amount Of Calculations Done
Mar 5, 2014
Why this extremely simple program seems to be giving me a negative value for amount of calculations done within one minute ( Just using it as a bit of fun to see how different computers in the office perform).
Java Code:
class Benchmark {
public static void main(String[] args) {
long endTime = System.currentTimeMillis() + 60000;
int count = 0;
for (int i = 0; System.currentTimeMillis() < endTime; i++) {
double x = Math.sqrt(System.currentTimeMillis());
count = i;
}
System.out.print(count + " calculations per minute");
}
} mh_sh_highlight_all('java');
I am getting results between -2.1billion and -3.4billion which to me would make sense since they are not the best computers in the world but I would be expecting a positive value?
A shopkeeper in Diagon Alley needs you to write a program that will calculate the correct amount of change due to a customer. (In Diagon Alley they use three coins with different values, given below).
1. Prompt the user to input the amount of sale in Galleons, Sickles, and Knuts.
2. Prompt the user to input the amount of money given by the customer in Galleons, Sickles, and Knuts.
3. Create constants that represent:
a. 1 Galleon = 17 Sickles
b. 1 Sickle = 29 Knuts
4. Perform the necessary calculations and conversions to compute the correct change in the least number of coins.
5. create a formatted receipt recording the entire transaction.
Here are what is steps 1 and 2 and 5 but problem with are 3 and 4. I need to create the constants and use proper conversions to give the right amount of change back.
Java Code:
import java.util.Scanner; public class OperatorFormatting { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("Welcome to Flourish and Blotts");
[Code] ....
Basically, on steps 3 and 4 which are creating the constants and using the to make the proper conversions to give the customer the proper amount of change Due.
I am having problems with writing a simple program to see if a number is divisible by 6.
public void run() { println("This program will display all numbers divisible by"); println(" 6 between 1 and 100."); int x =1; boolean divide =(x%6==0);
[Code] ....
It is telling that every number is not divisable by 6?
(5,0) with cost 12 (6,0) with cost 14 (6,1) with cost 15 (6,2) with cost 20 (7,2) with cost 44 (7,3) with cost 52 (7,4) with cost 54 (6,3) with cost 71 (5,3) with cost 74 (4,3) with cost 96
Greatest path is of length 10.
Now, the code that I have works, kind of. Instead of recurring several times at each point, it only recurs once.
So say I'm looking at (1,1). With (1,1) being 57. The area around it looks like this.
97 47 56 35 57 41 89 36 98
Now when I look at it, there are several paths it can take. It can go 57, 97 or 57, 89 or 57, 98. However, I'm pretty sure that it just uses the first one that corresponds with the first if statement that is valid. So I start checking north of the value, then northeast, then east, then southeast, which at southeast is where I find my first greater than value. After it finds it's first valid number, it then continues from that number, instead of checking if there are other longer paths stemming from the original value.
In conjunction with that, you can see that the printout just returns all paths from each value. Which isn't what I want. I need a way to store the longest current path, then check each path after to see if it's longer. If it is, it's replaced, if not, it stays the same.
I've also attached Ass1Q2_test4.txt
import java.util.*; import java.io.*; public class MaxIncreasingSub {
I am having some serious difficulty getting my project off the ground. I have the following code:
FileInputStream file = new FileInputStream(new File("src/retestchecker/test_sheet.xlsx")); //Get the workbook instance for XLS file XSSFWorkbook workbook = new XSSFWorkbook(file); //Get first sheet from the workbook XSSFSheet sheet = workbook.getSheetAt(0); Row row = sheet.getRow(0); Cell x = row.getCell(3); System.out.println(x);
Everything is properly imported, etc etc.. But I am getting this error and I am not sure what it means:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException at retestchecker.RetestChecker.main(RetestChecker.java:23) Caused by: java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlException at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
[Code] .....
Java Result: 1
I am using Netbeans and the latest version of Apache POI that was released May 11, 2015.
The line 23 that the error refers to is this line:
/** * In this program, use for and while loops with calculations to get the lottery odds. */ import java.util.Scanner; import java.util.Random; public class Lottery { public static void main (String []args)
[Code] .....
I need getting my numbers matching. When, I run the program each time no matter what number it keeps saying sorry no matches. However, I do need the program to have matches.
I have written a simple grade average program. This is my code:
package programs; import java.util.Scanner; public class GradeAverage { public static void main(String[] args) { Scanner input = new Scanner(System.in); int number; int counter = 0; int grade;
[Code] ....
Now the program is working just fine but what I don't like about it is the fact that you have to enter the number of grades before entering the grades. What I would prefer is to write your grades, hit some button that is reserved for calculating the average and then get the output.
Ii am trying run a do while loop on java a specific amount of times for example if i were to type in "Enter number of years" and enter 4. i need the loop to execute 4 times or if i said 6 times then i would be 6. the program i have repeats it and takes it back to reentering "Enter number of years" i need it to execute by its self x amount of times. here is what i have so far
System.out.println("Enter the number of years: "); years = keyboard.nextInt(); rainfall = generator.nextInt(10) + 1; System.out.println("Year " + "rainfall amounts were");; for (int months = 1; months <= 12; months++)
so I had to make a program that prompts the user to enter a loan amount and the years for the loan and I have the conversions and everything my only issue is that when the chart pops up it just looks like a bunch of numbers and its missing the column headers
for example
Interest Rate Monthly Payment Total Payment
import java.util.Scanner; public class InterestRate { public static void main(String[] args) { double monthlypayment = 0; double totalpayment = 0; Scanner input = new Scanner(System.in); System.out.println("Enter Loan Amount");
I am trying to write a program that basically determines the max amount of units sold and displays it in a dialog box. Also, the program will display the winning sales associate out of 10. I have wrote the program successfully so far and I can see the maximum number of units sold displayed in the dialog box, but I cannot seem to link the winning sales person.
Here is the code I have typed so far.
//Program to find maximum of three number
import javax.swing.JOptionPane; import java.util.Scanner; public class Sales { public static void main (String[] args) { //Declare variables int num1, num2, num3, num4, num5, num6, num7, num8, num9, num10; int large; int winner;
Recently I have missed a few weeks of my class due to family emergencies. Because of this I have missed very important lectures. My professor has assigned me the following assignment:
Prices Write a Java program that specifies three one-dimensional arrays names price, amount, and total. Each array should be capable of holding 10 elements. Using a loop, input values for the price and amount arrays. The entries in the total array should be the product of the corresponding values in the price and amount arrays. After all the data have been entered, display the following output:
Total Price Amount
==== ==== ======
Under each column heading display the appropriate value.
I know how to display everything using printf, how to create the actual arrays and define the array size, but I am confused on how and what loop to use and how to construct it. This is what I have managed to write up so far:
import java.util.Scanner; // Imports the Scanner class import java.text.DecimalFormat; // Imports the DecimalFormat class
public class Prices { public static void main(String [] args) { double[] price = new double[10]; double[] amount = new double[10]; double[] total = new double[10];
// Create a new Scanner object Scanner keyboard = new Scanner(System.in); } //End of main method } // End of public class
So I have re-written the code but it is still not running correctly. Any number i type in it throws an exception, also i need the program to add the totals that i type in and then once i type -1 into the prompt button list all the number i typed in and give me the average.
import java.awt.*; import java.awt.event.*; import javax.swing .*; import javax.swing.text.*; public class Averages extends JFrame { //construct components JLabel sortPrompt = new JLabel("Sort By:");
I have to create a program that takes a list of student names and grades and then takes the 2 highest scores and reads them, but the result won't show. I'm pretty sure it's because I'm not sure about how to code the last part which should output the results. Here's my code.
import java.util.Scanner; //Reads input and outputs 2 highest scores //for loop. nested for. public class HighestScores { public static void main(String[] args) { //create values String studentName;
I do now have the problem where i have to insert the numbers 1 to 100 individually in order to allow the program to accept a grade as high as 100%.
Also as soon as i type in a negative number the system crashes and shows me a error as attached.
/* Averaging grades To use the Java Swing interface to calculate the average of up to 50 grades.Average is calculated once -1 is entered as a value. The grades are then sorted from lowest to highest and displayed in a content pane which also displays the average. */
import java.awt.*; import java.awt.event.*; import javax.swing .*; import javax.swing.text.*; public class Averages extends JFrame { //construct components JLabel sortPrompt = new JLabel("Sort By:");
Ok so I have my program working for the most part. In this program I am supposed to take input from the user until they enter a negative number and that works, the problem is that it doesn't work if I enter a negative number on the first prompt. For example if I enter a 100 it would prompt me again and if I enter a negative number it would quit and give me the average, but if I enter a negative number the first time I am prompted the program just gives me an error. How do I fix that?
import java.util.List; import java.util.ArrayList; import java.util.Scanner; public class Application { public static void main(String [] args){ Scanner input = new Scanner(System.in); List<Integer> grades;
In my cs class, we have to write a program that throws an exception if the user enters a negative number, the program should prompt the user to enter only positive numbers and then let them retype the number. But everytime I throw an exception, my program gets suspended.
What am I doing wrong, or is there no way to continue a program if an exception is thrown? Does the program automatically get suspended when an exception is thrown?
try{ do { N = kb.nextDouble(); if(N<0) { throw new NegativeArraySizeException(); } else j++; } while(j==0); fill.size(N); } catch(NegativeArraySizeException e) { System.out.println("The number you entered must be positive. Please try again."); }
I have printed the result of my program into an output file.
For some reason I can't figure out how to get the file output.txt to actually print.
I've tried printing it like I would normally print a file but it's not working.
Java Code:
final PrintStream console = System.out; File file = new File("output.txt"); PrintStream out = new PrintStream(new FileOutputStream(file)); System.setOut(out); System.out.println(collection.toString()); System.setOut(console);
What do I do after this? mh_sh_highlight_all('java');
I was doing some exercises of a java tutorial website, and realized when I ran the code that they had , my program just kept running with no result, why is this? It just hangs.
package mystack; public class MyStack { private int maxSize; private int[] stackArray; private int top; public MyStack(int s)
My mad lib program was able to store my three notepad text: noun, verb, and story. I would like to find out what is the best way to make it display my result randomize my story from notepad? once everything is stored?
import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; import java.util.*; public class StoryProject extends JFrame implements ActionListener
I'm getting back into the swing of things with Java after using I'm asked to utilize a simple GUI in order to take in the starting data, I cannot seem to get this to work. I'm getting this error Exception in thread "main" java.lang.NullPointerException
at java.awt.Container.addImpl(Unknown Source) at java.awt.Container.add(Unknown Source) at Input.buildPanel(Input.java:53) at Input.<init>(Input.java:27) at InputDemo.main(InputDemo.java:5)
I have my program set up I thought correctly. When I click the buttons, nothing is happening.
import javax.swing.*; import java.awt.*; import java.awt.event.*; public class RobertMaloneChapter18 extends JFrame { //set final sizes for window private static final int WIDTH = 300; private static final int HEIGHT = 200;
I was learning Java and there was this exersize to construct a simple pyramid of prespecified height and width. The program i wrote is turining up with the wrong result.
package asgn2; import acm.graphics.*; import acm.program.*; public class pyramid extends GraphicsProgram { private static final int BRICK_WIDTH = 30; private static final int BRICK_HEIGHT = 12; private static final int BASE_BRICKS =14;
