I've started writing a new program that Scans for some strings. I want to specify a random Integer to those Strings in order to do my desired idea. what should I do?!! my codes are here :
import java.util.Random;
import java.util.Scanner;
public class Draw {
public static void main(String[] args) {
System.out.println("This Program is written to solve little problems in families cause of doing unwanted works!!");
[code].....
now I want to Specify an Integer to each person that has been scanned! for example if the first person is " David " , which is a String, in the next step :
Random randomNumber = new Random();
randomNumber.NextInt(101);
int David = randomNumber.NextInt(101);
Run the code along with the attached csv file. The GUI contains a short explanation of what I am looking for. I have tried converting the integer array to a string array but the output is not the same as the command line. I receive errors when I compile.
I want to make a program that reads numbers from a text file and transforms them into integers and then displays on the screen, but i can not do this with numbers greater than ten as the read () method of the BufferedReader only reads character by character. If he has to read the number 34 or 2343, for example, i don't know how to turn that chars into a single integer value. How can i do this in a more elegant way than the way i show to you below? That was the solution i found, but i believe there is a cleaner and more elegant way of doing. I would also use the Integer and Character type to solve this problem. I'm trying to use less primitive data types. The following code works fine just with number 0 -> 99.
I would like to use Character and Integer now.
int number[] = new int[2]; int i, carac; i = 0; do { carac = leitor.read(); if (carac != -1 && carac >= 48 && carac <= 57) {
I am new to java and programming in general. I figured out how to convert an integer input to binary however I am having issues doing the opposite of converting a user input binary number to a decimal.
I need to do this with basic math (or string depending on how I represent the binary) and no functions.
I know how to convert binary to integer on paper but I am having a hard time working it out in java.
I have this project due and its asking that i print out what type of triangle it is when the user inputs 3 sides. I have most of it done and working, but it pops up different windows instead of using one window for everything. The assignment says it needs all the final info to be in one window. The boolean is coming from another method. I'm unsure how to get it into a string (Or if that's what i have to do). The method must return a boolean true/false.
import javax.swing.*; public class Triangle { public static void main(String[] args) { int side1 = getSides(); int side2 = getSides(); int side3 = getSides();
In my Java class, the last assignment we had to turn in was to create a program that would take a users input and create a new type of animal. I went through the different steps in the instructions, and everything seemed to be going well up until the point where we actually took the users input and created the new animal. Specifically, I kept getting an error stating that I could convert a String to an animal.
I'm attaching the main class (Animal), one of my animal classes (Bird) and the class where I'm getting the error (AnimalStuff). I turned the program in as is, so what's done is done, but I'd like to learn what I'm doing wrong and what I can do better. I do know that the loop in AnimalStuff is wrong as it doesn't work right either, but I'm more concerned about the conversion from String to animal, as the entire program depended on this to work, and it doesn't.
public class Animal { /** * @param args the command line arguments */ public static void main(String[] args) { } public static String kind; public static String integument;
[code]....
Is there anything that jumps out at to what I'm doing absolutely wrong?
How can i convert date to string. Is this the best way
// Create an instance of SimpleDateFormat used for formatting // the string representation of date (month/day/year)DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); // Get the date today using Calendar object.Date today = Calendar.getInstance().getTime(); // Using DateFormat format method we can create a string // representation of a date with the defined format.String reportDate = df.format(today); // Print what date is today!System.out.println("Report Date: " + reportDate);
I am converting String to date object while converting this i am getting Run time Exception. Here in this code i am using String tokennizer reading a data from a text file. Here is my code
public static void main(String[] args)throws Exception { FileReader fr = new FileReader("g:abc.txt"); BufferedReader br = new BufferedReader(fr); String line = br.readLine();
I am obviously new to programming and Java so I set myself the goal of creating a very simple auto type style of program so it gets the users input and relays it out again but potentially to another window (I am currently testing to notepad). The reason I am trying to make it is because i thought it could be quite simple and I can build on it as a project to make it better.
The issue I am having is that it outputs the first character to the window I am selected (again testing into notepad) but then stops and doesn't output anything else. I tried to figure out what was going on by putting a System.out.println(arr[6]); after the delay method but it just output a line so almost like what I was putting into the array was only storing the first character of the string? I cannot figure out why that would be...
import java.awt.*; import java.awt.event.InputEvent; import java.awt.event.KeyEvent; import java.util.Scanner; public class MyBot public static void main(String[] args) throws AWTException { //initialising robot Robot r = new Robot(); Scanner input = new Scanner(System.in);
I am supposed to write a program on PuTTY using UNIX (I have Windows 8), but I am not comfortable with it yet, so I am using Java through NetBeans (IDE 7.4).
The program has to follow these instructions (ignore the Linux part of the instructions, the rest is in bold):
Write a program on the Linux system using the putty utility. The program should get strings of data from the command line (that is, look for the data in the "args" array of strings). Use a loop to convert each of the strings in the array into a double and add the number to a total. Print the total after all of the strings have been processed.
The program will use try-catch to catch any error that occurs. If an error occurs, the program will print a message saying that the error occurred. The program can end at that point.
You should create the Java program using the nano editor. The input data should be a list of numbers on the line that runs the program.
The problem so far is that I keep getting an error when converting a String value into a new double value. I have yet to code the try-catch method in my program
Java Code:
import java.util.*; public class Program13Strings { public static void main(String[] args) { Scanner scan = new Scanner (System.in); System.out.println("How many lines of data do you wish to enter?"); int size = scan.nextInt();
[Code] ....
*NOTE: right where my code says double newDouble = Double.valueOf(newResponse); is where the error is occurring.
*ERROR: Exception in thread "main" java.lang.NumberFormatException: For input string: "abc"
at sun.misc.FloatingDecimal.readJavaFormatString(Floa tingDecimal.java:1241) at java.lang.Double.valueOf(Double.java:504) at program13strings.Program13Strings.main(Program13St rings.java:21)
I'm using the class below to encrypt and decrypt data in my program. It works rather well with the exception that I can't for the mind of me get the recreation of the key to work. When the program runs the first time, it creates a key and saves it to Data.txt. This part works fine, and there are no errors, the encryption and decryption works until I reload the program and it tries to recreate the key using the String in the .txt.
read = loadFile.readline(); byte[] data = read.getBytes("UTF-8"); key = new SecretKeySpec(data, 0, data.length, "PBEWithMD5AndDES");
I've looked at: java - convert Byte Array to Secret Key - Stack Overflow java - Converted secret key into bytes, how to convert it back to secrect key? - Stack Overflow
and a number of other sites which didn't work, both of these however suggested the key = new SecretKeySpec. The actual key became: "[B@79fe3f51". Whereas the recreated key became: "[B@3e1d1648".So they are close, but not the same.I create the original key like this:
public class Encryption { public Cipher dcipher, ecipher; // Responsible for setting, initializing this object's encrypter and // decrypter Chipher instances Encryption(String passPhrase) {
I'm stuck with the following error message when i try to convert a String to XML and back to a String.
Exception in thread "main" org.w3c.dom.DOMException: WRONG_DOCUMENT_ERR: A node is used in a different document than the one that created it. at com.sun.org.apache.xerces.internal.dom.ParentNode.internalInsertBefore(Unknown Source) at com.sun.org.apache.xerces.internal.dom.ParentNode.insertBefore(Unknown Source) at com.sun.org.apache.xerces.internal.dom.NodeImpl.appendChild(Unknown Source) at com.innovatrail.consulting.xml.XMLTEST2.main(XMLTEST2.java:66)
Below is my Java code snippet: The code syntactically correct except line 66. If you comment out line 66 in the source code, everything works just fine. The XML representation of my input string is denoted by INPUT 1 and that of my output string is denoted by OUTPUT 2.
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 am pretty new to Java and am just learning about two dimensional arrays. I think that I understand the concept, but I seem to be having trouble adding stuff to my array. I wanted to make an array to hold both strings and integers, but wasn't sure if I could put integers in a string array. So I thought that I would be able to convert my integers to string and then add them. This however causes an error. This is my code(yes its probably not the best):
static String [][] students = new String [14][4]; static int number = 0; String fName, lName, fullName; int test1, test2, test3, test4; String a, b, c, d;
In my java file I made Strings of date and time, but my MYSQL database needs Date and Time of course. I've tried to convert them, but I keep getting this exception: org.apache.jasper.JasperException: java.lang.NumberFormatException: For input string: "2013-02-20"
public class Vogel { static final String url = "jdbc:mysql://localhost:3306/turving"; public static void Insert(String datum, String tijd, String plaats, String spotternaam, String vogelsoort) { try { SimpleDateFormat format = new SimpleDateFormat("YYYY-MM-DD"); SimpleDateFormat formatt = new SimpleDateFormat("HH:MM:SS"); java.util.Date parsed = format.parse(datum); java.util.Date parsedd = formatt.parse(tijd); java.sql.Date sql = new java.sql.Date(parsed.getTime()); java.sql.Time sqll = new java.sql.Time(parsed.getTime());
I am trying to make a program that calculates the change due in dollars and cents. The user inputs both the amount due and the amount tendered. My program only works with whole numbers?
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.
Code: public static void main(String[] args) { // TODO code application logic here Calendar time = Calendar.getInstance(); int min = 1;//time.get(Calendar.MINUTE); String blank = "0"; int checker = ((min > 10 ) ? min : blank+min); System.out.println("The time is " + "12" + ":" + checker ); }
This is my code, as you can see, I have if the min is less than 10, display the string "0" next to it so it will be something like
blank is zero and min is one
So it will display as 01 but after min reaches 10 and above, the 0 goes away. Problem I have is, you just cant add "blank" to int checker because checker is an int and blank is a string. So what must I do in order for it to display the 0 under checker?
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
but when I put this second line, the conversion, the program stops to work. I tried also with Integer.valueOf(timeInterval) but again I had the same problem.
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
