Taking two input strings that are integers such as "1234" and "567" then multiplying as you would do by hand. Trying to get them saved in the n3 new string but something is going wrong. You also need to account for the zeroes that have to be added just like on paper.
String mulN(String n1, String n2) {
int p = 0, tmp = 0; int zeros = 0;
String n3= "";
String r = "";
for(int i = n2.length()-1; i >= 0; i--) {
I Have been playing with this for while, and I can not seem to get my head around, how I can do this. I need to get the last two digits of a year that a user will enter. For example, a date like July 2 , 2014, I want to get the last two digits of year 2014 which are "14" and divide it by 4. This will give me 3.5; how ever I will disregard the ".5" and just keep the 14. I have no problem doing the division, my biggest this is how to just get the last two digits of a year. This is what I have so far, it is basically a template of how I want my program; I just need getting the last 2 digits of a year.
public class DateCalc { public static void main (String[] args) { String month; int day; int year;
[Code] ....
" This will give me 3.5; how ever I will disregard the ".5" and just keep the 14 ". I meant that I just want to keep the 3 from the 3.5 that will be generated when you divide 14 by 4.
Write a program that reads from the user an integer and reduce it by multiplying its non-zero digits. The result of the multiplication is a number which is to be reduced as the initial one. This process continues until an integer of one single digit is obtained. For example:
Your program should display the number obtained in every iteration.
Sample run1 Enter an integer: 64734502 After iteration 1: 20160 After iteration 2: 12 After iteration 3: 2
Sample run2 Enter an integer: 97737999 After iteration 1: 6751269 After iteration 2: 22680 After iteration 3: 192 After iteration 4: 18 After iteration 5: 8
Write an application that inputs one number consisting of five digits from the user, separates the number into in individual digits and prints the digits separated from the user, separates the number into its individual digits and prints the digits separated from one another by three spaces each.
For example, if the user types in the number 42339,
the program should input 4 2 3 3 9.
Here is my code so far but I am stuck.
mport java.util.Scanner; public class Seperating { public static void main ( String[] args) { Scanner input = new Scanner(System.in); int number = 0 ; System.out.printf("%d" , number ); System.out.print("Enter integer"); number = input.nextInt(); } }
but I am not getting the result I wanted what am I doing wrong
Goal is to: Write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits.
First I don't know where I made mistakes here, and the only error it finds right now is that str2 was not initialized and I cannot figure out where/when to initialize it.
import javax.swing.JOptionPane; public class DigitsAndSum { public static void main (String[] args) { String str1; String str2; int int1 = 0; int int2 = 0;
I multiplied 100 000 000 by .14145023952445 on java and the output I got is 1.4145023952444999E7. I know it is equal to 14145023.952445 but why is that?
Is there a way to multiply two single arrays in which the corresponding iteration from one array multiplies with the corresponding iteration from the second array. For example say you have array1[] and array2[]. Each array has a length of 5. Is there a way to multiply array1[0] by array2[0] and array1[1] by array2[1] and so on.... without having to actually write out the equation of array1[0] + array2[0] = someValue for all iterations of the two arrays?
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???
I am looking for a program to generate a unique alphanumerical identifier that is not too long; for example would start out with 6 digits like a licence plate or a postal code ex: AAA001 and use up all the possible combinations until 999ZZZ (just an example) and then when the possibilities are exhausted a 7th digit is added and so on. It matters not if they are sequential, the identifier just needs to be unique and not be too hard to remember (also i don't want to use ip adress or any personal identification). How I can accomplish this using java.
I have about 100,000 (N) random long variables in an array. I'd like to find if any two longs are equal; they're not expected to be. At this size, should I use the Hashtable or brute force it at a cost of N^2/2?
import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class PrintALongFile{ public static void main(String[] args) throws FileNotFoundException{ File inFile = new File("C:VeryLongFile.txt");
[Code] .....
When I try to read from a file that's 4,075,904 lines long and 41,646KB in size, it wont go past line 1,266,471. The above code is simplified from my actual program, which actually prints out the results to another file. However, the console (Eclipse IDE) and the output file, both show that it's stopping at the same line.
I have to use a long primitive type for the input of a credit card number and ID the credit card by using the first number of the input; however, the only way I know for that is to use charAt, which is used for a String. Is there a way to convert long to String, or am I missing a better solution? (There's no code because I'm still doing the pseudocode).
I want to develop a Java EE application for the following scenario.
Webapp takes a file from a user and analyze the file. This analysis could take hours. User should be able to check if the analysis is finished via AJAX. When the analysis is finished user should be able to view the analysis report that has been generated by the analyzer.
I checked what are the possibles ways I could achieve this but couldn't get a clear idea. I heard about JMS, Work Manager API and servlet asynchronous processing. But still not sure what to use and how to use.I'm not very much familiar with EJB.
I have a problem with my application. It supposed to store 4 different Room objects but when I entered one only it stores tat object variables into all my Array elements. I just need it to store any number of objects as long as it is less than 4.
Java Code:
import java.util.Arrays; import java.util.Scanner; import javax.swing.JOptionPane; class TestRoom { public static void main(String [] args) { String[] roomsInHouse = new String[4];
I've built up an unreasonably large and unreasonably complicated JPanel. Unfortunately, when I use setViewportView to add it to a JScrollPane, a get an extended UI freeze—that operation takes several seconds. I'm trying to figure out what's taking so long. I've tried some fairly extreme things, like overriding the paintComponent, PaintComponents, paintChildren, paint, repaint, validate, revalidate, and validateTree methods in the panel with no-ops to try to figure out what's taking so long, but to no avail. I've tried validating the JPanel before adding it, but that has no effect. If I override the addImpl method of the scroll pane, that makes things quick, but it doesn't really narrow things down much.
I'm trying to output a ten digit phone number as a string on one file, and write another program to write it as a long because I don't know what value I need to use in order to get the code to run properly on either one.
I have in my application a button that when it is pressed, runs a long running task (usually takes a couple of seconds....).
My problem is that while the task runs, I want to stop the button from receiving clicks. Unfortunately this is something I have not achieved.
I have tried creating a new thread and calling the long running method, and using the Display.geCurrent().asyncExec...
Examples of what I have tried so far:
myButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { if (myList.size() > 0) { myButton.setEnabled(false); myButton.setGrayed(true);
[Code] .....
In both cases, while the button is disabled and the cursor busy, if the user clicks the button, the long running method is ran several times - and this is what I want to avoid.
I have to seperate a number 9876 to 6 7 8 9, to 9 8 7 6. I need to know how to sum the digits. I have gotten to this point ::
import java.util.*; public class week4program { static Scanner console = new Scanner (System.in); public static void main(String[] args) { int num1; int digit; int sum = 0;
[code]....
To this point its gives me the seperate integers. OK but how do I get the variable integers into seperate containers and then add them up?My assignment is to do that, and what I have above gets me to where I have seperate digits, but how do I catch them into seperate entities to be added to a sum?
I have created an application using hibernate and struts.In which a form is created where the user will enter all its personal details(for e.g name ,phone no. and address).
Here for address I have used textarea and whenever user enters the address, sometimes it can be a long string also.
So the problem is if a long string is entered then while displaying that ,address comes on single line and the page is stretched.
how to break this single string into mutiple lines in java class?
I have a primefaces datatable with about 52000 records to be fetched.Since it is a large dataset,i tried using live scrolling feature of primefaces with scroll rows equal to 20.THe number of columns is 53.The table also has filtering and sorting feature on its each column.Still i am not satisfied with the performance of the table.It takes about 15 secs for the page to load,worst thing is that it takes about 65 secs for the next set of 20 records to be loaded on reaching the end of scrolling.
Just for testing i reduced the total number of records to 25000 and the preformance improves with scroll time of 29 secs.I am really not able to understand why it is taking this much time when i am displaying only 20 records at a time.The total number of records should not have affected the performance.
Currently, my program converts Long values to String. And when I test it out, it do print out the correct output. However, when the converted String value is passed over to be written in a text file, it seems that BufferedWriter isn't printing out the outcome that it's supposed to be.
saltVs = Long.toString(saltV); System.out.print(saltVs); //will print out 79723172
Now the problem is here...It only prints out the last digit of the String value (instead of 79723172).
Here is my FileWriter/BufferedWriter part.
Why is that when I run my program using command prompt, it prints out the output that I wanted, but however when it comes to writing to the file, it doesn't come out right.
