//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);
}
}
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.
Can I assign multiple values to one variable? For example I want myNum = 0 thru 9 you see im trying to program a password checker program to verify that the password meets all the criteria 8 char long, 1 upper case, 1 lower case, 1 numeric, 1 special, and don't contain and or end
View Replies View RelatedIm new to jsp. I have the following html in my jsp
<select name="job" id="job">
<option value="Booked">Booked</option>
<option value="Assigned">Assigned</option>
<option value="In Process">In Process</option>
<option value="Completed">Completed</option>
</select>
How do I assign job in the scriplet like how we do <% String job = request.getParameter("job")%> but on the same page? <% String job = request. getParameter("job")%> returns null value.
At first I wanted to just use an array and set each day a value, however I was told that it has to be stored as a string.
Design and implement the class Day that implements the day of the week in a program. The class Day should store the day, such as Sun for Sunday. The program should be able to perform the following operations on an object of type Day:
A. Set the day.
B. Print the day.
C. Return the day.
D. Return the next day.
E. Return the previous day.
F. Calculate and return the day by adding certain days to the current day. For example, if the current day is Monday and we add four days, the day to be returned is Friday. Similarly, if today is Tuesday and we add 13 days, the day to be returned is Monday.
G. Add the appropriate constructors.
H. Write the definitions of the methods to implement the operations for the class Day, as defined in A through G.
I. Write a program to test various operations on the class Day.
import java.util.*;
public class Day {
static Scanner readinput = new Scanner(System.in);
String day;
public Day(String day) {
[Code] ....
So right now if I run my code it allows me to type in a day, then it gives me the next and previous day, the last part is to add X days to it. Ideally I would like to be able to take the day entered, depending on the day set a numeric value, then add prompt for number of days you want to add. The program should then use modal (%7 ) to add value to the value that was given based on the day, and then translate it back into a String value (the day).
I need the user to be able to input a number, and for the program to assign this value to an 'int' variable. I know how to do this with a 'string' variable:
Java Code:
String options = JOptionPane.showInputDialog(null, "In your decision, how many options do you have?
" +" (NOTE: The maximum number of options = 5, and you must enter your answer as a numeral.)"); mh_sh_highlight_all('java');
But I need to know how to do this with an 'int' variable.
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.
What is the difference between float and double?
View Replies View RelatedI 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]....
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.
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?
View Replies View RelatedOk, 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');
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?
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] .....
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?
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???
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] ....
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?
View Replies View RelatedI 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));
}
}
}
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.
I am doing an assignment where I have to find the price per square inch of a pizza, compare them and display the results. I have everything figured out with the values and stuff. Now when I have to displays the results I have to display which of the two pizzas is more favorable.
I have both values / square inch for both. and I know how to find the minimum value of the two wit the Math.min class.
My question is how can I assign the char, PIZZA A to the value that I had so I can display it in the output statement, without writing PIZZA A. It should display after the difference is calculated.
Here's my code so far.
// This programs finds the price per square inch of a pizza
import java.util.Scanner;
import java.text.DecimalFormat;
public class PizzaSquareInches {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
DecimalFormat df = new DecimalFormat("#.###");
[Code] .....
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[ ....
simple assignment of values to a previously initialized object?
See the method useModel ()
The idea is, assign the values to the temporary object, data
Then plunk it into this statement:
model.addRow ( data );
Simple enough?
I've been putzing with the syntax for multiple hours, over days, now.
With and without
[0];,
Netbeans keeps giving me: Illegal start of expression data is declared as an array of Object, although, in this case, it does not need to be an array. What is the correct syntax?
Java Code: //--
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Date;
import javax.swing.JFrame;
[Code]....
This code currently just prints out the memory for the objects. What I am doing that it obviously wrong?
import java.util.ArrayList;
import java.util.List;
public class deck extends Card {
public final String[] SUITS = { "Heart", "Diamond", "Clubs", "Spade" };
ArrayList<Card> deck = new ArrayList<Card>();
[Code] .....
I've been referencing my text and a few other sites to assist in building this class...and I'm still uncertain of the purpose of a few of the methds: next(), hasNext().
Also, I have not found a clear explanation of the following code example: tail.next = tail; There are several instances of this in the code below....I'm just not sure exactly how this assigns the value to the next object in the other class..?? ??
public class MySinglyLinkedList<T> implements SinglyLinkedList<T>{
protected NodeList<T> head, tail, current, newNode;
String name;
int size = 0;
public MySinglyLinkedList(){
head = null;
tail = null;
[Code]...
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.)