What Is Difference Between Float And Double

Jan 31, 2011

What is the difference between float and double?

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Difference Between Big Decimal And Float / Double And Benefits

May 28, 2014

I've recently came into reading that term big decimal, but I still don't fully understand what the benefit it is or why wouldn't you just use double and say have the program stop after a certain range?

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Java API - Truncate Float Part Of Double Variable

Jan 13, 2015

Is there a method in Java API that truncate the float part of a double variable after a given number of digits?

Example: if the number of digits to be truncated is 2, so the method truncate (6.9872) to (6.98) ,

I tried to write a method that do that but it was very difficult.

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Scanner Class Error For Decimal Values (double / Float)

Apr 23, 2014

I'm not getting why my program is giving error.

package rockjava;
import java.text.NumberFormat;
import java.util.Scanner;
public class file4 {
public static void main(String[] args)

[Code] ....

Please Input Num of Pods + Num of Keys= 20.5
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextFloat(Unknown Source)
at alijava.file4.main(file4.java:14)

(It is not accepting double values. However working fine for integers.)

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Compilation Error Type Mismatch - Cannot Convert From Double To Float

Apr 20, 2014

I have a simple doubt

float k = 0;
k+=0.2;
k=k+0.2; // here compilation error

compliation error Type mismatch: cannot convert from double to float

My question is why not a complilation error at k+=0.2;

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How To Put Default Int / Float For JTextField

Feb 4, 2014

Will I'm tying in my code to set a default number for the JTextField that when the user decide not to put any numbers. Like let say that I want the textfield set to 0 , so then the user do not file it it won't make any problem to the program because its already has a default number.

if (stringGQ != null && stringGW != null && stringGP != null){
 stringGQ = gMQ.getText();
stringGW = gMW.getText();
stringGP = gMP.getText(); 
weightPrice_1M = Double.parseDouble(stringGW) * Double.parseDouble(stringGP);

[Code] .....

Note: This is a small part of my code. when I leave it empty it take the 0 as a value, However, when I write in text field it also take the value of a 0 and the finalTotal is also = to 0.what I'm doing wrong.

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Blank Value In Float Array?

May 11, 2015

I am getting the blank value in the array and this code is passed in IVR for playing the values since the first value is blank the prompts arrangements is disturbed. I want to replace the blank space or value by zero.

I have pasted the log and below is the code.

DEBUG - 7053CFEF4819D884638A42F088B507C3:/EntryPoint_1000 : session id:IVREPMSUAT2-2015083130037-4 |
Comm_DBinteraction-trcITELOutput | V_COUNTERTYPE:: | v_counterType : 1,2,3,4,5,6,7,8,9,10
DEBUG - 7053CFEF4819D884638A42F088B507C3:/EntryPoint_1000 : session id:IVREPMSUAT2-2015083130037-4 | Consult_IVR_3000:Comm_DBinteraction-trcITELOutput | V_SPENDINGLIMIT:: | v_spendingLimit :,500.0,59.5,0.0,1101.0,581.5,393.0,0.0,0.0,0.0

[code]....

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Show Max And Min Value Of Float Integer

Feb 20, 2014

How do I write a program that shows the max and the min value of a float integer? I found out that in order to get the long I just type in

System.out.println(Integer.MAX_VALUE); and System.out.println(Integer.MIN_VALUE);

I don't know how to do it to a float integer.

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Assign Float Value To Int Variable

Feb 24, 2015

//Output is:ERROR.. one of the books says, we can assign float value to int variable, but its giving error.

class floint
{
public static void main(String arg[])
{
int i;
float j=10.12f;
i=j;
System.out.println(i);
}
}

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Showing Min And Max Value Of Float Integer?

Feb 20, 2014

How do I write a program that shows the max and the min value of a float integer? like for example in order to get the max value of a long integer we type System.out.println(Integer.MAX_VALUE); How would I do that for a float integer?

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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');

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Binary Search Of Float Array?

Mar 25, 2014

Doing an early exercise out of the Java Examples in a Nutshell book and they are asking for 'an efficient search algorithm to find the desired position' of two floats in a sorted array that bound an int. My try is below:

public static int search(int searchnum, float[] nums){
int low = 0;
int high = nums.length - 1;
int mid = (low + high) / 2;
while(low < high){
if(nums[mid] < searchnum){

[Code] ....

This is working for the example but I would like to know if it is considered 'efficient' or even good?

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Writing Float Array To File

Apr 20, 2014

I am trying to write a Float Array to a file but it is only writing the last line of the array to a file. I have also attached the entire assignment as a zip file with all required files. Here is the part of the code I am having issues with:

Java Code:

for (int i = 0; i < differenceArray.length; i++){
System.out.println ("Date: "+ dateArray[i] + " Opening: " + dataArray[i][2] + " Closing: "+ dataArray[i][5] + " Difference: " + differenceArray[i]);
try(FileWriter writer = new FileWriter("C: emp" + fileName + ".txt")){
writer.write(Float.toString(differenceArray[i]));

[Code] .....

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Converting From A Vector Containing Big Decimal To A Float

Mar 13, 2015

I'm having extreme difficulty in working with a Vector storing a column with a BigDecimal value, and converting that single value into a float. I'm not sure why the code was written this way, but basically, I'm working with something called a vector that has a single Big Decimal value/column (not sure what the correct terminology is), and I want to store that value in a float variable called "dp". However, I don't know how to convert from the Big Decimal to a float.

Code is below:

String s = "";
sql = "SELECT DiscountPercentRate FROM Attendees WHERE AttendeeId=" + attendeeId;
  Vector v2 = sqldb.getResults(sql); /*I know that sqldb.getResults(sql) returns a vector with a single BigDecimal column of 15.0, in the test example I'm using*/
if (!v2.isEmpty()) {
Vector data2 = (Vector)v2.elementAt(0);
if (!data2.isEmpty())

[Code] .....

In case you're wondering what the sqldb.getResults() method looks, like, here's a snippet of it - There's an else statement that triggers in my case, adding a BigDecimal column to a vector, and returns that vector.

Vector v = new Vector();
...
else {
BigDecimal bd = rs.getBigDecimal(i);
vCols.add(bd);
}
v.add(vCols);
...
return v;

How can I take the single result of my SQL query in that Vector/Big Decimal thing, and turn that result into a float value?

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Multiplying Two Strings - Float Values

Jul 1, 2014

I am currently learning about JOption pane. Using Strings I am accepting an input from the user and by using the Interer.ParseInt(variable) option I am able to multiply this two strings using the code below.

String Length;
Length = JOptionPane.showInputDialog("Enter the Length");
String Breadth;
Breadth = JOptionPane.showInputDialog("Enter the Breadth");
System.out.println(" Area is " + (Integer.parseInt(Breadth) * Integer.parseInt(Length)));
System.exit(0);

Now My question is... How Do I make my code accept Decimal values. E.g. My Code should accept 10.02 as Length and 20.42 as Breadth and give the product a Decimal. How Do I do this???

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Error - Invalid Float Literal

Apr 26, 2014

While doing trial and error got caught in the below scenario.

public class Crypt {
public static void main (String args[])
{
/*all I want is calculate a binary number (ex -: 22 , 34) using decimal base (10n).
*So, I have to convert 2 p into 10n form so I have to find n in terms of p . We have x as the input.
* The formula works as below.
*2p =10n
*p ln (2) =n ln (10)
*n = p [ln(2) / ln(10)]
*2 p = 10 p [ln(2) / ln(10)]

[Code] ....

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Converting The Output Of Table To Float Point Value

Apr 26, 2015

I created this program to display a square root table. Problem is all of my output is too long. I would like to round the number to 4 spaces past the decimal. Here is my code:

public class MySqrt5_2 {

public static void main(String[] args) {
System.out.println("Number SquareRoot");
int[] table;
table = new int[21];
for (int counter = 0; counter < table.length; counter += 2) {
System.out.println(counter + " " + Math.sqrt(counter));
}
}

}

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JavaFX 2.0 :: Float Modeless Popup On Top Of All Other Content

Jun 1, 2014

I have a case where I want to float a modeless popup on top of all other content. Seems like a Popup is ideal for this. Except for the following annoyances:
 
I don't see any way to tie its position to some owner window. You can supply an initial anchor position, but I noticed that if I drag the frame of the app window containing the JavaFX application, the Popup remains where it is and can actually appear outside the bounds of the App! I find this very disconcerting. I suppose I could bind its position to the screen coords of the Stage, but it would seem that I should not have to do this.If I minimize the app, the Popup remains visible. Rather odd given that when I called Popup.show(Window), you would think when the owner Window got hidden it would hide the owned Popups too. Again, I could probably bind to some property on the Stage, but like (1), it seems you should not have to do this. 
 
I haven't tried this while embedding the Scene in a browser. I certainly hope that these Popups should not be allowed outside the bounds of the browser window. That spells trouble.

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Read Float Numbers From A File / Put Them In Array And Sort

Jun 30, 2014

I'm supposed to write a program, which reads float numbers from a file, puts them in an array and sorts the array. After that I'm suppose to add the numbers so that when I add the 1 and 2 number of the array, I'm suppose to save the sum on the position of number 1, then I add number 3 and 4 and save the sum on position 2 etc. Also if my array has an uneven number of floats it's suppose to add the last 3 and not 2 numbers in the last iteration. The problem is the method throws an ArrayOutOfBounds Exception but I can't seem to find my mistake.

That's the second method. The first one just stores the sum in another variable and then returns it. Also is there a way in that I can Scanner/File/array etc. and initialize the array only once so I don't write the same code two times like it is now.

package sumOfFloats;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Arrays;
import java.util.Scanner;
public class SumOfFloats {
public static float sumFloats() throws FileNotFoundException{

[Code[ ....

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Error In Program To Read Int Or Float Type Data From Keyboard

Aug 9, 2014

Here is a code and error .....

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Program To Accept String Float And Integer As Command Line Arguments

Feb 8, 2015

Write a java program to accept a string, float and an integer as command line arguments. String value should be displayed. Also the program should display the maximum value of two numbers. Use Integer.parseInt() and Float.parseFloat()

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Difference Between Eclipse And JDK?

Feb 27, 2014

I'm not sure if that's the right place to ask

But I am a bit confused:

I know that JDK means "Java Development Kit" , but isn't Eclipse the same thing? (so why it's called "IDE"?)

Or maybe Eclipse is a type of JDK?

Or actually JDK and Eclipse are 2 different things

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JSF :: Difference Between EventHandler And ActionListener?

Feb 11, 2015

What Is the difference between an ActionListener and an EventHandler ?

button.addActionListener(new ActionListener() {
button.setOnAction(new EventHandler<ActionEvent>() {

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Difference Between Unused And Unread

Sep 19, 2014

exact difference between

1. unread fields
2. unused fileds

in java

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Difference Between Abstract And Inheritance

Dec 16, 2014

I am new to java i dont understand the difference between the abstract and inheritance i mean we use the abstract class with extends with other class name ,even we do that same in the inheritance pls tell me main difference between abstract and inheritance...

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Difference Between Java And JavaScript?

Jul 11, 2014

how to program in Javascript, I am wondering what are the advantages and disadvantages OR pros/cons of using JS versus say a language like Java?

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