I have a string value returned from a background tool that will range from 0 to possibly terabytes as a full number. I want to format that number to use commas and to reduce the character count using an appropriate size modifier (KiB, MiB, GiB, etc). I've tried converting the string number to a Double value using Double.parseDouble() and then performing the math based on the size of the value with this code:
If I use the class DecimalFormat to format long number, how can I convert it back to integer?
DecimalFormat longFormat = new DecimalFormat("#,###"); long testLong=11000; String strLong=longFormat.format(testLong); System.out.println("NUM : " + strLong); //Assume that at this point I don't have //testLong, I have only the strLong value... long newLong=Long.parseLong(strLong) * 2; //java.lang.NumberFormatException: For input string: "11,000
I want to remove all numeric number in String text
String text = She was born in 1964,and now her age is 55; String delim = ","; StringTokenizer stringTok = new StringTokenizer(text, delim); String f1 = "%-40s"; String h1 = String.format(f1, "Token list");
I am using a TreeSet to tokenize a string. The output is sorted with numeric first followed by words
E.g. 13 26 45 and before etc.....................
Is there a tidy way to remove the numeric?
Last bit of my code is :-
// print the words separating them with a space for(String word : words) { System.out.print(word + " "); } } catch (FileNotFoundException fnfe) { System.err.println("Cannot read the input file - pass a valid file name"); }
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 have errors in the "if" and both "else if" ... The compiler says "cannot convert from String to boolean and int to String ...
instructions:
1. Add two private instance variables, String courseName and char grade to this class.
2. Add accessor and mutator methods for these instance variables.
3. Add a method register which receives an integer data type and returns String data type according to the argument passed to it ("Math" for 1, "English" for 2, "No course" for any other input)
What I have so far:
package assignment9; public class BannerUser { private int userId; public int getUserId() { return this.userId; } public void setUserId(int userId)
So I have to convert strings to double numbers and there can be no exception.
The strings that aren't numbers or do not fit into a set criteria have to be discarded.
When I try to write this I get an exception when a non-numeric is entered and the code stops.
What can I do? Also, am I finding the average of the array correctly?
import java.util.*; public class Grades{ public static void main(String args[]){ int arraycount = 0; final int SIZE = 10; int validArraycount = 0; final int ValidArraySize = 10;
In the test program, you will need to convert the Strings for quantity and price to numeric types. To do this, you could use the Integer.parseInt() method and the Double.parseDouble() methods. I'm not sure what he means by that. I attempted it in my program but I get these errors
Exception in thread "main" java.lang.Error: Unresolved compilation problems: number cannot be resolved to a variable description cannot be resolved to a variable quantity cannot be resolved to a variable price cannot be resolved to a variable Duplicate local variable quantity Duplicate local variable price Syntax error on token "myInvoice", delete this token The method getinvoiceAmount() is undefined for the type String
at InvoiceTest.main(InvoiceTest.java:7)
Code:
public class Invoice { private String number; //Instance variables private String description;//Instance variables private int quantity;//Instance variables private double price;//Instance variables
//Students Full Name firstName = JOptionPane.showInputDialog("Enter student " + "first name."); lastName = JOptionPane.showInputDialog("Enter student " + "last name."); // Get test grade (numbers) [b]test1 = JOptionPane.showInputDialog("Enter test1 grade")[/b];
The line in bold is where that error comes up. I know it something simple but I can't remember. I declared both firstName and lastName as Strings and then the test1 I declared as double. I had a similar error in a previous assignment where I had a integer(age) input and then i had an output statement asking for a name all I needed to do was put keyboard.nextLine(); after my age input and I was fine.
I have to make a programm where the user gives you the bank sorting code and the account number and you give him the IBAN. That was so far no problem and I was done within minutes except of one thing that I simply can't figure out even though im trying since weeks. At some point I have to convert a string to integer. My research told me its with parseInt() and I dont get a syntax error when I compile my programm (using BlueJ). But when executing the programm stops and gives me some weird bug message. Here is code and bug message:
Java Code:
public class IBAN { public IBAN(String Bankleitzahl, String Kontonummer) { Bankleitzahl=Bankleitzahl.replace(" ",""); // Die Leerzeichen werden entfernt int Anzahl=Bankleitzahl.length(); // Auf der Variabel Anzahl wird die Anzahl der Zeichen von der Bankleitzahl gespeichert
For my classes I wrote I have puts strings into a stack and also a queue and am wondering how to take the top of the stack and the front of the queue and turn those into strings in my main class and run them through while loops that will detect if they are palindromes or not. Right now I am trying to peek and use first to put in my while loop but they don't work with the .charAt because they are not considered strings I think.
import java.util.Stack; public class Palindrome { public static void main(String[] args) { // TODO Auto-generated method stub String enteredLine; int leftStack, rightStack; int leftQueue, rightQueue;
what will i compare in if statemet is the 1st letter of each if i have code="a" and name="Angelina" first letter of each is "a" and "A" then in convert it to string so that i can make it uppercase but when i compare it in if statement it always go into "not x" but the ouput that im getting is x=A y=A then it always direct me into else statement.
String code = "a"; String name = "Angelina"; char c = code.charAt(0); char n = name.charAt(0);
First project here and it has been a steep learning curve. I have some code in the TwoWaySerialComm class that will write to a Com port. In my other class EBIAlarm i have my GUI. The aim of my app is the send strings out of the Com port by pressing Jbutton1-3 I can open the Com port but I don't know how to send the string.
Some of the numbers can be converted from int to string , other cant. My problem is in if (input.length() == 3) and if (input.length() == 4. Basically having problems printing the 3 digit and 4 digit
public static void main(String[] args) { System.out.print("Skriv: "); Scanner console = new Scanner(System.in); String input = console.nextLine(); int firstDigit = 0; int secondDigit = 0; int thirdDigit = 0; int lastDigit = 0;
I'm trying to convert the first letter of every word in a String to uppercase. I've managed to isolate the first letter of every word and then make it uppercase but I don't know how to replace it.
public static StringBuffer makeUpperCase(){ String str = String.valueOf(input2); for(int i = 0; i < str.length(); i++){ if(str.charAt(i) == ' '){ char var = str.charAt(i + 1); var = Character.toUpperCase(var); System.out.println(var); } }
I am trying to figure out how to convert a string of ASCII code into char.I know that you can use (char) to convert it, but the issue is you cannot really just it for Strings.
I looked on other examples which have collection of object but I have this extra top level object "AvailableDeliveries" not sure how to handle that level.
