Precision And Recall Testing For Search Engines

May 14, 2014

I have code for precision and recall testing for search engines. I am trying to run it in Newbeans 8.0, but I am getting the common error in UnsupportedOperationException

I have tried making files and directories as the given in the code file. I am attaching the two files here.

Attached File(s)

 PrecisionRecall.rtf (1.79K)
 FSDirectory.rtf (687bytes)
error file-result.rtf (506bytes)

View Replies


ADVERTISEMENT

Recall Main Method After Calling Of JVM?

Jul 28, 2014

Can we recall the main method? I'm trying a code to recall main method (after the calling of JVM). I know this doesn't make any sense but I'm trying this just like that.

Code:

class derived {
public static void main(String args[]) {
System.out.println("Main Method class");
show();
}
static void show()

[code]....

View Replies View Related

Console Input Menu Unresponsive On Recall

Nov 28, 2014

I am currently tackling homework for a small I/O-program with console input.Right now, only the part when you enter "E" or "e" on the console is implemented and the issue I am trying to tackle is described in the comment starting at line 38:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Vector;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.InvocationTargetException;
import java.util.Scanner;

[code]....

View Replies View Related

Parallel Array Recall - Return Value Based On Input

Mar 8, 2015

I am having an issue with a parallel array that I created that returns array values based on an input. The code only works for the first four array locations just fine. The remaining values are not found. I thought it might be a memory allocation issue with the array size, I tried to dimension the array, however, using the Eclipse editor get errors.
 
import java.util.*;
import javax.swing.JOptionPane;
public class StudentIDArray {
static String[] studentNum = new String[]
{"1234", "2345", "3456", "4567", "5678", "6789", "7890", "8901", "9012", "0123"};
static String[] studentName = new String[]

[Code] .....

View Replies View Related

Error - Possible Loss Of Precision

Feb 10, 2015

I'm stuck trying to figure out why this isn't compiling.

Bumper.java:87: error: possible loss of precision
myX = (Math.random()* (rightEdge-myXWidth) + myXWidth / 2);
^
required: int
found: double
Bumper.java:88: error: possible loss of precision
myY = (Math.random()* (bottomEdge-myYWidth) + myYWidth / 2);
^
required: int
found: double

View Replies View Related

Changing Precision Of A Float?

Jan 26, 2014

Ok, so in my quest to achive perfect ray casting and line/plane intersection, what I believe to be my last problem is precision of a float. I need some precision (0.000) but I am dealing with the difference of (-1.000000000) and (-1.000000002), where the second number would be completely off. I looked at DecimalFormat, but that just puts it into a string, I need actual loss of precision.

Java Code:

DecimalFormat form = new DecimalFormat("0.00");
String newX = form.format(x);
String newY = form.format(y);
String newZ = form.format(z);
x = Float.parseFloat(newX);
y = Float.parseFloat(newY);
z = Float.parseFloat(newZ); mh_sh_highlight_all('java');

View Replies View Related

Array Index - Possible Loss Of Precision

Feb 5, 2015

public class Access
{
public static void main(String args[])
{
long a=2;
int j[]=new int[a];
}
}

Code shows error as "possible loss of precision" as am working with long type.but need to have my array size as 10^10 or some other logic?

View Replies View Related

Higher Precision Sums Than Double

Dec 31, 2014

What is the simplest way to sum a huge number of double precision numbers so the sum has higher precision than double?

View Replies View Related

Ability To Search A Binary Search Tree And Return The Number Of Probes

Sep 1, 2014

I'm trying to build a method that can search a binary search tree for a specific target and then return the number of probes it took to get there. It seems to me that the best way to do this would be a recursive search method and a counter that tracks the number of calls. But I'm struggling with how to implement this. Here's the code I have so far. what works/doesn't work with the method.

// Method to search the tree for a specific name and
// return the number of probes
public T search(BTNode<T> btNode) {

[Code]....

View Replies View Related

Swing/AWT/SWT :: Filling A Rectangle With Double Precision

Mar 4, 2014

I have run into a bit of a head scratcher, at least to me. I am building multiple rectangles using double precision. I had to switch from int to double due to another issue that requires decimal places. Now, my fillRect (last line in the code section I posted) is causing an error as it only wants to work with int.

public void draw(Graphics2D g2) {
// check that sizes are above 0
if ((rectWidth <= 0) || (rectHeight <= 0))

[Code]....

View Replies View Related

Determine All Of Perfect Squares Between 1 And 100 - Precision Error?

Mar 26, 2015

I am teaching myself Java and am trying to write a function that will determine all of the perfect squares between 1 and 100 but am running into a problem...

Here's my code:

package sqrroot;

public class SqrRoot {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
double sroot, rerr;
int count = 0;
for(double num = 1.0; num <= 100.0; num++){

[Code] ....

and here is the output:

run:
0.0
1.0 is a perfect square.
0.0
4.0 is a perfect square.

[Code] ....

There are 49 perfect squares between 1 and 100.
BUILD SUCCESSFUL (total time: 6 seconds)

Which is clearly wrong. Is there something wrong with my code or is this due to inherent imprecision in the double type or the Math.sqrt function?

View Replies View Related

Floating Point Precision - Output With Two Decimal Places?

Jan 27, 2015

Consider this small program and output.

public class Floating{
public static void main( String[] args ){
System.out.println( 2.80 - 1.75 );
}
}

The output is 1.0499999999999998. Why not 1.05?

View Replies View Related

Creating Search Method For Binary Search Tree

Apr 22, 2014

I want to create a search method that returns the frequency of a word in the search method.

public class IndexTree {
private class TreeNode {
TreeNode left;
String word;
int frequency;
TreeNode right;

[Code] .....

View Replies View Related

Calculate Person Calories Burned Per Minute - Possible Loss Of Precision Error

Feb 2, 2015

I was asked to write code to calculate a person's calories burned/min. This is what I got. The problem is I keep getting an error.

--------------------Configuration: <Default>--------------------
C:Program FilesJavajdk1.7.0_72CaloriesBurned.java:22: error: possible loss of precision
caloriesBurnedPerMinute = 0.0175 * METS * weightInKg;
^
required: int
found: double
1 error

Loss of precision? What does that mean? Do I have to change weightInKg into some other number type?

import java.util.Scanner;
public class CaloriesBurned
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
int runningHours, basketballHours, sleepingHours, METS, caloriesBurnedPerMinute;

[Code] ....

View Replies View Related

Testing TCP Client And Server

Oct 22, 2014

I am attempting to test a TCP Client and Server for an assignment I am doing in class. The goal here is to "test your client and Server applications by transferring (i) a file having 10,000+ lines (see supplied big-file1.txt having 12000+ lines), (ii) a file having 20,000+ lines (you may create one of your own from big-file1.txt, or obtain a large size file from the Google website at [URL] ...). Then, compute and display the total transfer time of the files at both of the sides separately (your choice in millisecond/second)."

I have created the TCPClient and TCPServer java classes, ran the server first and then the client, and using mathematical formulas to calculate the transfer time. Trouble is, I'm having trouble testing the client and server in the file area and not the area where I had to input a line, let the server print it, and then have the client eliminate the articles from the line. I need testing the file. Here is my code so far:

TCPClient:

package tcpclient;
import java.io.*;
import java.net.*;
public class TCPClient {
public static void main(String[] args) throws IOException{
// TODO Auto-generated method stub
String sentence;

[code] ....

How to fix the code so that the time in seconds does not output as 60 for both files and that the files go through the exchange?

View Replies View Related

Testing Boolean Statement

Mar 30, 2015

I wrote a class for encapsulating coins and I was to do a boolean statement but when I test the statement the results are not showing.Here is the code for my coin class coins.java

package project_3;
/**
*
* @author user a
*/
public class Coins {
private double pennies;
private double nickles ;
private double dimes ;
private double quarters ;
private int dollars ;

[code]...

View Replies View Related

Testing Double Null

May 2, 2014

how to execute a particular class. I've created a Kinematics class that will execute and calculate all the functions pertaining to kinematic equations. In the main class, I will have the user provide the data in JTextField. Now I need to test which JTextfields (variables) were left empty. I plan to use a number of if/else statements :

if(distanceI != null && distanceF != null)

The problem with this is that these variables are double and therefore cannot be tested as null. I read a few things about Double but I really don't see how I'm supposed convert each double variable to Double, is that even possible?

public class Kinematics {
double distanceI, distanceF, velocityI, velocityF,
velocityAverage, acceleration;
public Kinematics(){
//v2 = v1 + a*dt
if(distanceI != null && distanceF != null){
 
[code]...

View Replies View Related

Database Junit Testing

May 28, 2014

I have been designing a music collection application that runs from a database. I now need to develop a junit test to test the application but I am not sure if Junit has anything to work with testing databases. I have been googling on the internet but most of the search results do not really give any good examples that I can easily follow and adapt to my application. I am using only one table and I would like to test INSERT, UPDATE and DELETE actions and I would also like to test a successful connection.

I once found one tutorial which I cannot find any more that had something that retrieves all the data in the database and stores it in a CSV file and the loops through the CSV file to check or update information.

View Replies View Related

Testing Events Within Inner Class Using JUnit?

Apr 17, 2015

How do you test the events within an inner class using JUnit

// File: : events/SomePanel.java
// Purpose: Show use of named inner class listener.
 
import javax.swing.*;
import java.awt.event.*;
class SomePanel extends JPanel {
private JButton myGreetingButton = new JButton("Hello");
private JTextField myGreetingField = new JTextField(20);
 
[Code] .....

Code extract taken from: Java: Inner-class Listeners

Taking the above example, do I need to use myGreetingButton.doClick to trigger this event to test the respective variables/values being used ? Also the Actionlistener inner classes is private so doubt I can access this from JUnit Test class.

View Replies View Related

String Testing For Null / Empty?

Oct 13, 2014

I've been beavering away with Java for a few months. But as with all languages the String implementation looks designed to trip up even experienced programmers.

My current development gets data from various sources outside my control. When I get a string I want to test if it is empty/null/or whatever. Simple enough one thinks.

But if you search the internet you see everone seems to have a slightly different approach. So what is the best way of determining that a string is not useful to you?

I've had success with this

if(string == null || string.length() == 0)

But I've seen people using methods - not necessarily of String (e.g equals, empty) and regular expressions.

What is the best approach to this considering coding efficiency and/or processing efficiency (accepting you'd have to be processing a lot of strings for the latter to be an issue).

View Replies View Related

EJB / EE :: Bean Annotations And Unit Testing?

Mar 6, 2014

I have a bean that represents data been collected from a form on a jsp page. Currently I would like to validate my fields and write some test cases for them. As you can see from my test case example I test a string in the hope that it fails because it contains only one letter. My problem is my unit test is passing. The reason this is from what I can tell is that at runtime it fails when I try to persist my object using my entity manager. During my unit test I just I don’t call my entity manager I just try and set the field.

What I thought would happen was that when I use my bean fields set method the annotations would be checked and fail at that point. Hence why I expected my unit test in this case to fail.

What I would like to know is

1.Are annotations specifically designed to validate when I persist my object and am I using them incorrectly at this point?

2.Is this the best method to use to validate fields, is there a better way, should I write my own code to validate for me when I set my value?

a. Should I throw an exception from the set method of each bean field?

Unit Test:

@Test
public void testName(){
Human h=new Human();
try {
h.setFname("a");
} catch (Exception e) {
// TODO Auto-generated catch block
fail("failed");
e.printStackTrace();

[code]....

View Replies View Related

Syntax Error When Testing Code

Jun 4, 2014

My issue is that when I run the code if I enter anything but 1, 2, or 3 the code breaks. I have spent hours trying to find the error. here is my code

import java.util.Scanner;
public class Tester {
public static void main(String[] args) {
/**
* constructor
* pre: none
* post: inherit values of other classes
*/
Car Car = new Car(); //inherits the properties of the Car class
Truck Truck = new Truck(); //inherits the properties of the Truck class

[code]....

View Replies View Related

Testing Testcase In Junit3 Using Treemap

Apr 22, 2014

I am beginner in Java and facing one problem while testing junit3 testcase using treemap.

The code :
===========================
package sampleJunit3;
import java.util.TreeMap;
import org.junit.*;
import static org.junit.Assert.*;
import junit.framework.TestCase;

[code]....

While running as a Junit Test, test getting failed with error " Test Class not found in selected project".

View Replies View Related

Testing Two Mapping Libraries - Orika Vs JMapper

Feb 27, 2014

I have downloaded and testing these two mapping libraries. I wrote a program which has 100000 iterations and maps the beans of the same class:

public class IntBean {
 
    @JMap
    private int int1;
    @JMap
    private int int2;

[Code] ....
 
Mappers are created BEFORE iterations start:
 
    private JMapper jmapper = new JMapper(IntBean.class, IntBean.class);
    private MapperFactory orikaFactory = new DefaultMapperFactory.Builder().build();
    private MapperFacade orikaFacade = null;
orikaFactory.registerClassMap(orikaFactory.classMap(IntBean.class,IntBean.class).byDefault().toClassMap());    orikaFacade = orikaFactory.getMapperFacade(); 

What is in each iteration:this.orikaFacade.map(a1, a2);
or
a2 =  (A) this.jmapper2.getDestination(a1);
 
I know, that Orika and Jmapper are great libraries from Google and they use reflection in a different way than for example Dozer, which is much slower, they se reflection to generete code somehow..

I have 3 questions:

1) How they work - when the code is generated, during maven build, in runtime - everytime when I create mapper in code? Are they change class code byte dynamically?
2) Why there is this speed difference that I noticed?
3) Which library would you choose and why? Both have the same capabilities? Why both come from Google? Why Google didnt develop Orika and created Jmapper instead?

View Replies View Related

Swing/AWT/SWT :: Using Doubles For Positioning Objects And Testing Equality

Aug 15, 2014

I've been noticing some of my programs have been a little buggy recently, and think it's down to confusion over doubles and positioning. Lets say I have a label called banner that I want to scroll across the screen. Now I need to know the label's width in order to position it, but the width depends on the amount of text, so i use this code:

double bannerWidth = banner.getWidth();

Which forces me into using a double if I want to be accurate.

But the problem is that I'm trying to use a condition that compares the label's horizontal position (currentX) to the left edge of the screen (LEFT_EDGE), minus the width of the label (bannerWidth). In other words when the label is off the screen, it should go back to its starting position.

I assume that means that any variables I use to track the label's position (in this case currentX), or constants that I use to check equality (LEFT_EDGE), have to be doubles as well?

My difficulty is that I iterate currentX. But currentX--; won't work because doubles don't iterate as I'd expect.

So casting becomes an option..... but if I cast to an integer I effectively lose width on the label. And that is magnified each loop, resulting in the label's starting position moving further and further to the left.

View Replies View Related

How To Write A Computer Based Testing Program Using Files

Jan 8, 2015

I'm supposed to write a computer based testing program using files. I have started writing however, I am stuck. I am to prompt the user to enter the file name 'test.dat" and if something different is entered then a error message should be displayed. Also the file will create an input stream for the data using the file. I am to have the user enter other information about an employee and then write the record to the file.

The program should be created so when the user enters "quit" the loop is terminated and the file is closed. I'm not asking for code. I was just giving a brief synopsis of the project. Where I am stuck is I wrote the first part of the program that creates the file; however when I enter a wrong file name the exception error message does not display. The code is below:

import java.io.*;
import java.lang.*;
import java.util.*;
public class Project5Write
{
private Formatter x;
public void openFile(){

[Code]...

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved