String Manipulation - Getting User ID?
Apr 17, 2014
I have a string and i need to do some manipulation with that. I have tried couple of things but not sure if those are feasible or not. Here is the situation:
uid=aa,bb,ou=people,cn=administrativeldap,cn=punit.punit.a-12-m020.20,o=ttt
I want the value of uid from this string, actually it's user id.
This particular string i want :: aa,bb
Things which i have tried:
I was trying it in this way string start with uid and ends with ou, but in this case user name itself can have ou, so in that case it breaks. Another approach i was thinking of is splitting the string by = which gives me aa'',bb,ou at first position and then i will again split this string to remove ,ou. but i am not sure if this approach is good or not?
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Oct 1, 2014
I'm playing with vectors for the first time... What I'm trying to do is to allow a user to input one or more integers and store them in a vector for manipulation later on in the program... Here's the portion of the program I'm working with:
Java Code:
package com.itse2317;
import java.util.*;
public class VectorTest
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
[code]...
My question is this: Is there any way to move from inputting integers to printing them, without entering a non-integer (for example, hitting enter)? I looked at the API for the Vector class, and either I'm not thinking about the problem the right way to be able to find an answer, or it's just not there.
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Jan 23, 2015
I have to write a program that asks the user to enter the name of their favorite city and use string variable to store the input. The program should display the following:
-The number of characters in the city name
-The name of the city in all uppercase letters
-The name of the city in all lowercase letters
-The first character in the name of the city
However, I can't seem to get past the following errors;
Programming Challenge #12.java:37: error: variable cityFirstChar is already defined in method main(String[])
char cityFirstChar = city.charAt(0);
^
8 errors[CODE
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
[/CODE]
My code is as follows:
import java.util.Scanner;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
[code]....
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Feb 18, 2014
I do have a quick question about string manipulation. You see I've been given a simple exercise that involves asking the user to input a number between 1,000 and 999,999 and displaying the result. Simple enough, but the caveat is that if the user keys in the comma, say 24,000 instead of 24000 for example, the program is not to display the comma. I don't see how to do this without an 'if' statement. The book says the 'if' is not necessary but does offer this hint: "Read the input as a string. Measure the length of the string. Suppose it contains n characters. Then extract the substrings consisting of the first n-4 characters and the last three characters."
What good is n-4 going to do if the string's lengths varies?
Here's what I have written thus far:
import java.util.Scanner;
public class P13
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
System.out.print("Please enter a number between 1,000 and 999,999: ");
[Code] .....
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May 22, 2014
I'm having trouble with the last few lines of the code. It's supposed to take a replacement string entered by the user and print out the new string. For some reason it's now allowing me to enter a replacement string
import java.util.Scanner;
public class Project02 {
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter a long string: ");
String lString = keyboard.nextLine();
[Code] ....
Output:
Enter a long string: the quick brown fox jumped over the lazy dog
Enter a substring: jumped
Length of your string: 44
Length of your substring: 6
Starting position of your substring in string: 20
String before your substring: the quick brown fox
String after your substring: over the lazy dog
Enter a position between 0 and 43: 18
The character at position 18 is x
Enter a replacement string: Your new string is: the quick brown fox over the lazy dog <------ isn't taking user input
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Oct 25, 2014
I currently have an on going project of making a gameengine and am currently doing a lighting engine. How to create simple algorithm of explain to me the concepts of creating a algorthm to do a task, like explain how to get the hue saturation and brightness. This preferably needs to be done in java for me to copy the code but as long as i have a concept to go by I could probably translate the code over so it's not to much of a problem.
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Sep 15, 2014
I'm currently starting my thesis where my Project will involve creating a diff and merge tool for simulink slx files. These are built using several xml files, a png and sometimes some other data files. One can get to these files by changing the file extension to zip.
I am a bit troubled by this since I want to be able to handle all these files simultaneously and hence need to do this automatically when choosing the slx file.
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Mar 9, 2014
"Object contains data and code to manipulate that data."
Is the statement right ?? as far as i know object only contains copy of instance variables.
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Nov 21, 2014
I have a jpeg that I need to print a border around. My plan was to take the jpeg and throw it on top of a second image that is a few pixels bigger in each direction. Currently, my code prints the image with a white border on the right and bottom sides. Is there a way to print the border on all sides, and maybe even make it a more distinct color? I am not allowed to use graphics. I can only manipulate pixels. Here is the basis of my code.
public class MyArt
{
private Picture image;
/**
* Create an Art object using the jpg or bmp at the indicated location
*/
public MyArt(String filename)
{
image = new Picture(filename);
[code]....
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Apr 14, 2014
I need to create an java 2D application for the manipulation of image. I saw the JAI library but it can not install it properly, I also copied the jar but I can not find the solution. How can I do? there is a replacement for JAI? what other libraries can I use?
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Nov 20, 2014
I am working on a project using pictures and am having some trouble. My assignment is to take a jpeg, and reflect it(over an imaginary x-axis so to speak). As this is my first time working with images, I am very lost. My approach was to take "pixel 0" and have it swap places with "pixel max". Theoretically, I believe I would only need to do this for the first 50% of the pixels, as each flip works on 2 opposite pixels. With my code thus far (the reflect() method), I print the left half of the image. Note: I must use pixel manipulation. I cannot use graphics.
public class MyArt
{
private Picture image;
/**
* Create an Art object using the jpg or bmp at the indicated location
*/
public MyArt(String filename)
{
image = new Picture(filename);
[Code] .....
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Sep 11, 2014
I am suppose to create a rectangle and I have created two classes; Rectangle.java and RectangleTester.Java.
So far my code for the class Rentangle.java is:
package edu.sbcc.hw2;
public class Rectangle {
private int width = 25;
private int height = 25;
public rectangle(int xcoord, int ycoord, int thewidth, int theheight) {
this.width = width;
this.height = height;
}
public int getWidth() {
return width;
So for my assignment I need two instance variables for height and width for which I have, but it says in the assignment I need methods (settings and getters /mutators and accessors that allow manipulation of my instance variables which is a little confusing. Do I put these methods on Rectangle.java or RectangleTester.java.
The same goes for the calculateArea, where am I suppose to put this?
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Sep 29, 2014
I am attempting to use JLists to complete a program that models how operating systems manage processes. A quick synopsis of what it is supposed to do. Each process is to have a priority level (I chose to do 1 -3 with 3 being the most important) and there are supposed to be three lists. One for ready processes, blocked processes, and a running process.
My issues:
1) when I block a process it does indeed switch lists but when it is copied into the blocked list it pulls the element number instead of what the actual process number is. For ex: Say the ready list has 5 processes / I delete 2 / Leaving process 1, 2, 5. When I block 5, it gets registered in the blocked list as process 2.
2) I can't figure out how to give a label to each of my scroll panels (JLists) to signify which box is ready / blocked / and running
3) My switch button - I have commented in what I need to do but don't know how I am going to do it.
Below are my files:
Main
import java.util.Comparator;
import java.util.PriorityQueue;
import java.util.Queue;
import javax.swing.JFrame;
import javax.swing.JTextArea;
public class PQueue {
public static void main(String[] args) throws InterruptedException {
[Code] ....
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Apr 13, 2014
I trying to get this code to get user input instead of reading from a hardcoded array. I'm getting compile errors while trying to get user input. Here's some of the code:
Java Code: // BubbleSort Java
// compile with: javac BubbleSort.java
// run with: java BubbleSort
[Code]....
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Jan 14, 2015
I have to take a users input. The general gist of the problem is I want to convert a decimal number entered by the user inputs into it's binary equivalent....the conversion part I know how to do.
I'm stuck at the user input phase. If the user inputs a decimal number within the correct range (lets say between 0-5000 for this example) the conversion goes ahead as planned and the program outputs on the screen the binary equivalent.
If on the other hand the user inputs a number outside of this range ... OR a String OR and empty space, an error message is given and the user is asked to try again. I don't know how to handle it if the user enters the different types...int or String.
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Feb 15, 2015
I am suppose to design a problem the prompts the user to enter a String. Based on the input from the user, have the program prompt with a full description of the playing card entered. Below is a table of the notation and meaning:
Notation Meaning
A Ace
2...10 Card Values
J Jack
Q Queen
K King
D Diamonds
H Hearts
S Spades
C Clubs
Use the .charAt(...) to extract each character from the user's input and build a switch statement to determine the full description.
import java.util.Scanner;
public class PlayingCardIdentifier {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter a card notation: ");
String s = input.nextLine();
[code]...
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Apr 6, 2014
I'm not sure why but my infix string isn't removing the spaces. Here is the part of the code:
Scanner s = new Scanner(System.in);
System.out.println("Enter Infix express: ");
String infix = s.nextLine();
infix.replaceAll("\s", "").trim();
System.out.println(infix);
InfixtoPostfix convert = new InfixtoPostfix(infix);
String postfix = convert.toPostFix();
System.out.println("Converted Express: " + postfix);
Is there something I'm doing wrong? Here is the output when I run it:
Enter Infix expression:
(7 + x) * (8 – 2) / 4 + (x + 2)
(7 + x) * (8 – 2) / 4 + (x + 2)
Converted Expression: 7 x+ 8 – 2* /4 x 2++
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Jul 29, 2014
I'm having an issue with my program that needs 2 lines of input when I only want one. First I call Scan.nextLine(); to fetch a word. Then I want Scan.findInLine(word).charAt(number); to scan the string word for a letter instead of having to put another line in the console. How do I make Scan.findInLine(word).charAt(number); scan a single String instead of scanning input typed by the user?
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Jan 20, 2015
I am having trouble with getting a user input once they enter it in to a JTextArea and then storing it in to a string value. See, I wanted the user to enter an answer in to the JTextArea, and then once I store it in to a string value, I would be able to use it later. I wanted to after storing the variable to print it on to a JLabel, but nothing is showing up... Heres my code.
static String usera[]= new String [10];
for (int i=0; i< usera.length; i++) {
//These are the JTextArea names
usera[0]= Question1.getText();
usera[1]= Question2.getText();
[Code].....
I already initialized the JLabels earlier in my code, and I did not feel the need to post all my code here. This is where I am trying to get the string variable and then printing it out.
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Apr 18, 2015
I'm working on an assignment for my Java Programming class that requires me to work with Multiple Classes.
Overview of the assignment: Create a "Database" that allows a user to input information about a College Class.
My program has three Classes:
The information that must be tracked in the Course Class is:
- Section Number
- Instructor
- Classroom
- Students (an ArrayList of class Student)
The information that must be tracked in the Student Class is:
- Name
- Major
- GPA
- Hours
The Driver class will use the main method to print the user a prompt asking for inputs, then display all of the user's inputs after he/she wished to exit the program.
I'm having no trouble with asking the user for inputs and then checking the validations for the inputs, I'm currently struggling with return a String that houses all of the user's inputs for the variables above. The information must be returned in a method called toString(). Both the Student and Course Class must have a toString() method that returns the information in the class (value of the variables), I must then call upon these methods from the main method of the Driver Class to print them back to the user.
The toString methods within the Student & Course Classes are at the bottom of the code
To Summarize: What I need to do within the toString() methods to return the values the user has inputted for the various variables? Such as.. Should I pass something through the method? Do I need the this keyboard to pass through the variable again? I just fear that I'm currently misunderstanding a very critical part of programming.
My Driver Class
import java.util.Scanner;
public class Driver {
Course courseInputs = new Course();
Student studentInputs = new Student();
public static void main(String[] args) {
[Code] .....
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Jul 14, 2014
Now I am doing dictionary app using files..
Here i want to print the String from Starting character which is given by user..Here i given below the image like my concept..here we put .(dot and enter R)eclipse will print the method name which is starting from R..
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Jul 26, 2014
I have the code below that just keeps getting the user's name and displaying it until the user enter's an empty string. Well, to simulate that, I just hit the keyboard instead of entering any name but for some reasons I am not seeing in my code, the programme just keeps looping.
System.out.println("Enter your name :
");
Scanner st = new Scanner(System.in);
while(st.hasNext()){
System.out.println("Enter your name :
");
String name = st.nextLine();
System.out.println(name);
if(name==" ") break;
}
System.out.println("you are out of the while loop now!!");
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Oct 28, 2014
This is the first time we are using 2 different classes. This is the code I have so far. What I am having trouble is doing the calculations and storing the value into the planet the user selected and keeping it going. I will attach the instructions ....
public class FakeGravity{
// Instance variables
private String planet;
private int VelocityDecay;
private double BouncinessFactor;
// default constructor
public FakeGravity(){
[Code] ....
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Apr 24, 2014
So this application gets input from the user and converts it into a string. It then uses various methods to set instance variables of this class and ends up printing those classes to display information to the user about that products.
package javaapplication5;
import java.text.NumberFormat;
import java.util.Scanner;
public class Product
{
private String product;
private String description;
private double price;
[Code] ....
I am getting a logical error. My output is this:
Enter a product for information. Choose either Java or C++
java
Prduct: null Description: null Price 0.0
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Jul 8, 2014
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?
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Apr 16, 2015
I made a guess a number program but I am having issue figuring out a way that when a user enter's in nothing for the program to spit out a message saying "hey entering nothing doesn't work try again" then ask for input. I have done some research and from what I have found is to read the input in as a String rather than int, and use something like Integer.valueOf() to get the integer value but I am completely lost on how to apply that to my program here is my code
//import statements
import java.util.*; //for scanner class
// class beginning
public class Guess {
public static void main(String[] args ) {
//Declare variables area
int guess, secretNumber = (int) (Math.random() * 10 + 1), lowGuess,highGuess;
[Code] ....
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