Create Dynamic String Array If Don't Know Number Of Strings In The Beginning?
Feb 21, 2014how to create dynamic string array if we dont know number of strings in the beginning?
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Create Separate String Objects As Strings Are Immutable
Jan 28, 2015I want to clarify it whether this below code, when running this loop, will it create separate string objects as strings are immutable or else, will it keep the same reference(as each time inside loop, we use the same name 'rslt') and assign new string value for this?
while(inc < numberOfColumns){
String rslt=rs.getString(inc+1);
rowArr[inc] = rslt;
inc++;
}
How To Concat Multiple Strings To A String Array
Dec 28, 2014I am trying to update a Rubik's cubes side by adding each of the 9 squares of the Rubik's cube's side.
So for example:
cube.front.squares = cube.fronts.squares[1] + cube.front.square[2] + cube.left.sqaures[8] ... //until 9 sqaures are added, where squares is a String array of size 9. However, when I try doing this I get an error stating "change 'square' to 'String'". I know I can go in an individually change the values like:
cube.front.squares[0] = "whatever"
cube.front.squares[1] = "something else"
but I know there is a better way to do this...
I also just tried to use String[] concat= ArrayUtils.addAll(first, second) but that only takes in two arrays at most according to the API: [URL]...
How To Access 4 Strings Randomly From String Array
Jun 13, 2014Now I am trying to print the 4 string randomly from string array..where string contains no of words which are splitted from the file....
View Replies View RelatedSplit String And Storing It In Array Of Strings
May 10, 2014String str = "#11* 1# 2*12# 3"
required o/p in array as
#11
* 1
# 2
*12
# 3
i.e splitting the strings for every 3rd string and storing it in an array of strings ...
Create 2D Array Out Of CSV File And Find Number Of Elements To Determine Array Size
Mar 24, 2015I am taking the Class Algorithms and Datastructures and got an assignment for Lab that really throws me off. The goal is to create an Array out of a given CSV file, implement several Methods that get the size of array, etc.
I am still stuck in the first part where the CSV has to be imported into the Array. My problem is that I need a mechanism that figures out the needed size for the Array, creates the array, and only then transfers the data from the CSV.
The list consists of the following wifi related values:
MAC-Adress, SSID, Timestamp, Signalstrength.
These are on the list, separated by comma. The Columns are each of these, and the rows are the four types of values making up the information on a certain wifi network.
The catch is, we are not allowed to use any of the following:
java.util.ArrayList
java.util.Arrays
and any class out of java.util.Collection.
So far I used the BufferedReader to read in the file and tried to implement the array, but I get an arrayindexoutofboundsexception.
Below is my Code (Its still an active construction zone):
public class WhatsThere {
public WhatsThere(String wifiscan) throws IOException {
}
public static void main(String[] args) throws IOException {
// WhatsThere Liste = new WhatsThere(String wifiscan);
String[][] arrayListe = new String[0][0];
[Code] ....
String Split Method - Return Array Of Strings Consisting Of Substrings Splitted By Delimiters
Sep 28, 2014I am having a problem with the following code. It compiles and runs fine however my output is wrong.
public class SplitString {
public static void main(String[] args) {
String[] string1 = split("ab#12#453", "#");
String[] string2 = split("a?b?gf#e", "[?#]");
for (int i = 0; i < string1.length; i++) {
System.out.print(string1[i] + ",");
[code]....
The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting of the substrings split by the matching delimiters, including the matching delimiters.public static String[] split(String s, String regex)For example, split("ab#12#453", "#") returns ab, #, 12, #, 453 in an array of String, and split("a?b?gf#e", "[?#]") returns a, b, ?, b, gf, #, and e in an array of String.
Create Array That Produces Triangular Number Sequence?
Nov 12, 2014My code complies but it won't run and I'm not sure why. ArrayIndexOutOfBoundsException.
I'm trying to create an array that produces the Triangular number sequence:1, 3, 6, 10, 15, 21, 28, 36, 45, ...
Attached image(s)
How To Find Whether Strings Contained In Array Of Strings Constitute A Similar Character Or Not
Aug 25, 2014I am having an array of strings and i want to find out whether these strings contained in the array contain a similar character or not.For example i am having following strings in the array of string:
aadafbd
dsfgdfbvc
sdfgyub
fhjgbjhjd
my program should provide following result: 3 because i have 3 characters which are similar in all the strings of the array(f,b,d).
JavaFX 2.0 :: Is It Possible To Create Dynamic GUI?
Jul 7, 2014I'd like the GUI to be drawn based on definition file. Is it possible to "generate" fxml (like PHP does html) so I could do this:
for (...) {
command_to_generate (<button ....>);
}
?
Or is using legaxy javaFX code the only way to achieve it?
Write A Program To Create Dynamic Maps
Apr 15, 2014As per requirement i need a dynamic multi map in my application. How to write a method to create the dynamically map.
View Replies View RelatedServlets :: How To Create Dynamic Table In View Page
Mar 28, 2014What i have done till now is i make a table in html explicitly (by assigning fixed rows and columns) . Now what i want is to show a table of whose number of rows and columns are generated dynamically according to the table in the database.
View Replies View RelatedCount Number Of Occurrences Of A String In Array List?
Apr 6, 2015I am trying to count the number of occurrences of a string in an array list. I used the following code:
int count = Collections.frequency(strings, search);
strings is the name of the array list and search is the string that I am trying to count the number of occurrences of. My program compiles correctly, but when I enter the string to search for, I get the following error: "Exception in thread "main" java.lang.NullPointerException at java.util.Collections.frquency(Collections.java:37 18)
Why am I getting this error message and how do I fix it?
How To Randomly Select A String In Array Based On Corresponding Number
Dec 21, 2014I'm trying to generate a random word from the array that I have made including the words by making it corresponding with a randomly generated number. So for example, if the number generated is 0, then the word that the person has to guess would be "AUNT". How would I transfer the randomly generated number from one method into the array method to get the word the person has to guess?
Write a program called Word Guessing Game. Open the file FourLetterWords.txt and write the contents into an array of Strings (the file has 87 words in it). Then use a randomly generated number between 0 and 86 to select a word. The player will then try to guess the word selected by the game. The player is allowed 7 tries, if the player does not guess the word on the 7th try he/she losses. Display the letter of the word as they are guessed in the correct order, you will also display the incorrect letters. The game is over when:
- The player completes the word, or guesses the whole word correctly.
- The player does not guess the word in seven tries.
The player must also be allowed to terminate the game.
The game must have at least 5 classes:
- Main Class
- Class to return a random integer between 0 and 86.
- Class to return a populated array of 87, 4 letter words.
- Class to return a character that the player enters from the keyboard.
- Class to display both the correctly guessed letters and the incorrect letters.
My code (it is not complete, my attempt to do what I am trying to do is obviously not working.)
import java.util.Scanner;
public class WordGuessingGame {
public static void main(String[] args) {
final int NUMBER_OF_WORDS = 87;
RandomWordGenerator.random(NUMBER_OF_WORDS);
[code]...
Accept String And Number Of Repetitions As Parameters And Print String Given Number Of Times
Oct 3, 2014I'm having a hard time with this problem, this is what I have, but I can not use two integers, I have to use one integer and a string...
This is the question:
Write a method called printStrings that accepts a String and a number of repetitions as parameters and prints that String the given number of times. For example, the call:
printStrings("abc", 5);
will print the following output: abcabcabcabcabc
This is what I attempted:
public class printStringsproject {
public static void printStrings(int abc, int number) {
for (int i = 1; i <= number; i++) {
System.out.print("abc");
}
}
public static void main(String[] args) {
printStrings(1, 5);
}
}
Create Class Employee Which Contains A String Variable Employee Number
Jul 13, 2014I have searched for totalPay is always 0 and the responses are not related to my problem (that I can tell).This is a class assignment and I have other questions besides why the method is not working.
Here are the instructions: Create class Employee which contains a String variable Employee Number, a String variable Employee Name, an integer Hours Worked, and a double Pay Rate. Create get and set methods for each variable. Provide method "totalPay" which calculates and returns the total pay by multiplying the hours worked by pay rate. Use figure 8.12 as an example of an object with get and set methods.
Unlike other examples of this type question online this one has Employee Number as a String variable. The book is How to Program Early Objects by Deitel 9th edition.We have instructions to do only what she has told us too. At this point it is objects and getter and setter methods. It is only the beginning of week 2.
ON THE LINES WHERE I HAVE QUESTIONS I AM COMMENTING IN ALL CAPS. NOT SHOUTING, JUST TRYING TO MAKE IT EASIER
package test11;
import java.util.Scanner;
public class Test11 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
[code]..
Essentially I cannot figure out how to get the method getTotalPay to be called by the Scanner and do the math. I also have this random bracket problem that showed up about an hour ago.
The concept I don't get is that if I omit this.employeeNumber =id; etc. I error all over the place. If I change it to this.employeeeNumber = employee Number Netbeans tells me it is assigning itself to itself, which I know. When I try to use id instead of employeeNumber I get errors all over. If i remove "this" from it the same happens. why in public class employee I have to change to those values (id, name, etc) in the construct and set them again? I don't see where or how they can be used, so why do i have to do it?
Implement Dynamic String Into SQL Statement
Aug 26, 2014I have some spatial datasets which are availabe in a opensource metadata catalog software GeoNetwork and in a PostGIS database.The problem is that the student who created the database used different IDs for the same datasets. So the IDs in the GeoNetwork differs from the IDs in the postGIS database. They only have the same name So, if someone uploads a new dataset into GeoNetwork, the same dataset is uploaded into a postGis database too.
Now I want to add a ID column into the database to give the field the same ID like the ID in geonetwork. I think I can only do this with using the filename cause they are same in both cases.Now I want to alter the table in eclipse with following code:
PHP Code:
Connection con = null;
Statement stmt = null;
String query = null;
String filen = filename.substring(0, filename.indexOf('.'));
con = DriverManager.getConnection("jdbc:postgresql_postGIS://localhost:5433" + "user=postgres;password=dominik1;" + "database=geonetwork"); --> (the connection data will later be in a properties file)
query = "ALTER TABLE " + filen + " ADD GN_id INTEGER(10) ";
stmt = con.createStatement();
stmt.execute(query); mh_sh_highlight_all('php');
But i get the following findbug error:
Failed to execute goal org.codehaus.mojo:findbugs-maven-plugin:2.5.2:check (default) on project services: failed with 1 bug
org.fao.geonet.services.resources.UploadAndProcess .exec(Element, ServiceContext) passes a nonconstant String to an execute method on an SQL statement ["org.fao.geonet.services.resources.UploadAndProces s"] At UploadAndProcess.java:[lines 83-299]..
I tried to suppress this error and worked with PreparedStatement and String.Format but I can't get rid of this error.
Dynamic Array With Input
Oct 25, 2014Create a one dimensional array which holds 10 values. Ask the user to input an index value between 0 and 9. Print the value the user selected. Be sure to explain the output to the user. That is my assignment, and here is my code:
import java.util.Scanner;
public class Array {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int a[]= new int[9];
a[0] = 10;
a[1] = 20;
[code]....
I don't know how to use the scanner to get someone's input properly.
Dynamic Initialization Of 2D Array Of Objects?
Aug 15, 2014if, instead of an ArrayList, can I do the following to initialize a Dyanmic array ? :
First, in my class, I have :
class Example{
private int rows;
private int columns;
private AnotherClass[][] 2DArray;
public Example(int rows, int columns){
this.rows = rows;
this.columns = columns;
[code]....
How To Create Simple Random Number Generator For Number Between 1 -10
May 18, 2015I am working on a little nothing project, but I wanted to create a random number generator for a silly game where the user guesses the number.I have used google, but they are using LOG statements, what it does.
View Replies View RelatedRegular Expression To Find A Line Beginning With A Certain Character Using Java?
Jul 12, 2014I have a text file that has the following lines:
the boy is smart
He is from Australia
** Highly important line
That's all
Now, I need a regular java expression that would match a line in this file that begins with the ** characters. That is, when I match the text with the regex, I should get only this line :
** Highly important line
How would I write this regex in java?
Create 4 Types Of Strings Under Same Method But Only Draw One At A Time
May 11, 2015I am having trouble with methods. What I want to do is be able to create 4 types of strings under the same method, but only draw one of them at a time.
i.e
UI.initialise;
UI.addButton ("pipe", this::drain);
public void drain(){
this.pipe ("pipe1");
this.pipe ("pipe2");
[Code] ....
When I press the button "drain" it will print=
pipe1
pipe2
pipe3
pipe4
I am having a lot of difficulty just printing one out after each time I press drain.
"drain"
pipe1
"drain"
pipe2 etc..
Return Integer That Is The Number Of Strings That Starts With S
Apr 29, 2014Write a Java code of the method startsWithCount that takes an array of strings words and a String S. The method should return an integer that is the number of strings that starts with S.
For example if:words = { "All", "Arab", "size", "Almond", "Allowed", "here"} and S= "All", then the method should return 2
PHP Code:
public class StringwithCount {
public static void main (String[]args) {
String strings[] = { "All", "Arab", "size", "Almond", "Allowed", "here"};
String output= "";
for ( int i = 0; i < words.length; i++) {
if (words[i].startsWith("s"))
c + +;
}
Count Number Of Characters Contained In Both Strings And Display Results
May 2, 2014I have been working on this for hours and cannot get it to work properly. The program is to count the number of characters contained in both strings and display the results. It is also to display the final statement, but only once. This version has a complete statement for each matching character.
import java.util.Scanner;
public class CountMatches {
public static void main(String[] args) {
String firstStr = ("");
String s1 = firstStr;
[Code] ....
Converting Strings To XML And Back To String
Mar 3, 2014I'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.
package com.Test.xml;
import java.io.ByteArrayInputStream;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
[Code] ....
INPUT 1:
<Collection>
<BookList>
<Book>
<Title>Wonder Man
</Title>
<Author>John Smith
</Author>
<Category>Fiction
[Code] .....
OUTPUT 2:
<Collection>
<Book>
<Title>Wonder Man</Title>
<Author>John Smith</Author>
<Category>Fiction</Category>
[Code] ....
I/O Arrays - Count Number Of Repetitiveness In String For The Number
May 19, 2014//read the file
//make the numbers 1 string line
//count the number of repetitiveness in the string for the numbers
//display four lowest ones
import java.io.*;
import java.util.*;
public class Lottery2
[Code] ....
when I run it the array gets sorted but how do i keep the data in other words
what it is supposed to do is grab numbers from a file, and give me the lowest 4 numbers back. I know the numbers using the array but how do i pull out the lowest 4 and keep the data true no matter what numbers or how many of them are in the file.