I am having difficulty with the following method. I can't figure out if my problem is, but I have narrowed it down to not populating the array list from the ... |
My code is as follows:
private static ArrayList<String[]> file;
...
void method()
{
file = new ArrayList<String[]>();
...
String[] s = str.split(";");
file.add(s);
}
In the above, str is a long String that ... |
Why it print the wrong output?
ArrayList<String> loc = new ArrayList<String>();
This arraylist stored the value of:
[topLeft, topLeft, topLeft, bottomLeft, topLeft, bottomLeft, topLeft, topLeft, Left, topLeft]
the firs index 0 is ... |
I need some help reading data from a txt file into my ArrayList. I know the code is pretty messy, but just try to take a look at it. The ... |
How to read an arraylist from a txt file in java?
My arraylist is of the form:
public class Account {
String username;
String password;
}
I managed to ... |
public void getWebContent() throws Exception {
Scanner in = new Scanner(System.in);
System.out.println("Input URL:");
fileURL = in.nextLine();
if (!fileURL.startsWith("http://")) {
...
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how do i make my csv file reader to read my csv file in java to an arraylist, start from line no.3 but line1 and line2, each of them is read ... |
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I have file with this specific format:
0
2 4
0 1 A
0 5 B
1 1 A
1 3 B
2 6 A ... |
I have troubles reading an arraylist from a java class with jni. In the java class the arraylist is defined like this
public static List XTN_STC_search_result = new ArrayList();
The arraylist then gets ... |
When IM trying to read a object and store in arraylist but im getting an exception this is the part of code where im facing an problem.
public class Customer ...
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How do you read the contents of a file into an arraylist in Java? A real simple list like:
cat
house
dog
.
.
.
Just read each word into the arraylist. Thanks for the help!
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public void readExcel(String fileName)
try
{
FileInputStream myInput = new FileInputStream(fileName);
...
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The method below is supposed to read a binary file into an arrayList. But getting a java.io.EOFException:
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2553)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1296)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at .... Read(Tester.java:400)
at .... main(Tester.java:23)
Line 23 at main just calls the ... |
I have created two classes and I am trying to invoke a constructor(with argument) and a method. I find it easy if I just use an object.
My Goal :
- To invoke the ...
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I'd like to read all CDATA associated to a child node and store them into a java ArrayList! If you could suggest a simple and quick way I'd grately appreciate ... |
I have two arrays the store the values of two lines that are read in from a file. After some processing in my GUI class it should show to rectangles side ... |
Is it possible to read from a arraylist and write to a excel. I reading some records from the DB and trying to write to and excel file I get ----- java.io.IOException: Unable to read entire header; 88 bytes read; expected 512 bytes at org.apache.poi.poifs.storage.HeaderBlockReader. (HeaderBlockReader.java:78) at org.apache.poi.poifs.filesystem.POIFSFileSystem. (POIFSFileSystem.java:83) My code ---- ResultSet rs2 = stmt2.executeQuery(repSQLStatement); String filePath = "C:\\test1.xls"; ArrayList ... |
Hi Java masters, I'm facing some difficulties with a java quizz. Please give me some ideas. -------------------------------------------------- Quiz01 : The text file has three records like : John NO.123, HirLet Road,LL 234 025-5-5455 1 5 0 2 7000 Paul NO.23, Hello Road,LL 235 025-5-5454 1 5 0 2 6000 Mary NO.23, Mine Road,LL 235 23-5-5454 1 5 0 2 9000 According ... |
Hi all im new here and pretty new to java to. I am just working through examples and trying things out for my self. What i wanted to do was read a text file that has records in them seperated by a newline and pass them into an ArrayList. So far i have created an Accounts class that looks like this ... |
Ok, the next assignment we received was to take our prior program and convert it from an Array to an ArrayList. For the most part this worked well, but when I tried adding file code (read/write the ArrayList) I ran into problems. The write worked well, by well I mean that it didn't throw an error and it seemed to write ... |
Is it possible iwth jxl? I don't see any examples? I am reading a excel file like bleow. Workbook book = Workbook.getWorkbook(file.getInputStream()); Sheet sheet = book.getsheet(0); Bean b = new Bean(); ArrayList list = new ArrayList(); for(in t i=1; i< sheet.getRow(); i++) { String name = sheet.getCell(0, i).getContents(); and so on..... //add to a bean. b.setName(name); and so on... } I ... |
Hi everybody I have wrriten a code to save data from a text file into any array list. I am using array list for the first time. I have used only array before. In the text file I have data that is seperated by comma , I need each element to be stored in a seperate array position that is ..... ... |
You do realise your for loop counts 4 elements, not 3? Do you simply want to print 3 elements in a line? It is probably easiest to write three calls to iterator.next() and forget the inner loop. Remember you need to check with the hasNext method before trying to get a next element, otherwise you will suffer an Exception. |
Thanks I have done that but getting an error "score1 is not public in PackageName.ScoreEnd; Cannot be accessed outside package" I have imported the package the ScoreEnd class is in Looking in the ScoreEnd Class and all the elements are public. Well the class is public I left the elements to be default. |
read and write arraylists to a file Hi, Im working on a stock system for a project and im fairly new to java. I need help with my saveFile, readFile and displayReadFile methods, I cant display the file in cmd when i choose the displayReadFile method, i get null values instead. So im not sure if ive done soemthing ... |
Hallo, Im a newbie in Java and my boss want me to make a program to read the txt file through Java, since he want to use it later. The example of txt file is like this: ************************************************** ******* * SIDAK * ************************************************** ******* * MISS RATIO: 4.15 * * SHOOT RANGE: 36.2 [mm] * ************************************************** ******* * No.: Z [mm] ... |
Hallo, Ive a problem by reading the ArrayList inside the HashMap. I have a class, to fill this HashMap: Map flanks = new HashMap(); This HashMap is going to fill the Map on MSFlank-class. On that MSFlank-class, I have another ArrayList: private List mstooths = new ArrayList (); and on that MSTooth-class, I have another ArrayList: private List msprofiles ... |
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public void checkOut (String vertrekNummer, int vertrektUur, int vertrekMinuten) { for (int positie = 0; positie < bezoekerArray.size(); positie++) { if ( vertrekNummer.equals( kaartNummer ) ) // error of couse, but how to say 'if it equals to the 'kaartNummer' in the array? { System.out.println( "gelijk" + bezoekerArray.get(positie)); } else System.out.println( "ongelijk "); } } |
Why would you need five different ArrayLists for that? For example- what should be in your "start state" or "final state" ArrayLists? Why do you have a State class if you aren't going to use it? I think you should probably reread your instructions, because I think you're misunderstanding something pretty basic. I suppose I could be wrong, but your requirements ... |
Hi, I am using this piece of code (below) to read an excel file into an array list. How can I change it to make it read a csv file? Note: it should, when done, return the same array list. Any help would be greatly appreciated. Thanks public static ArrayList readSimParamToBeAnalyzed(String simParamToAnalyzeFileLocation) { File mySimParamToAnalyze = new File(simParamToAnalyzeFileLocation); ArrayList records = ... |
i think i might have it figured out. since i'm only printing would there be any problem with me setting each field as a string? and so essentially i would have 3 files, one that reads the file (later printing), one that defines my objects, and the the text file itself. i guess i was just hoping i could define my ... |
Your overall design appears faulty to my eye in that it is easy to make a mistake doing it this way. Surely there is a better way to organize your data. That being said, let's look at your second group of code. I believe that listGroupResult is an arraylist of arraylists, correct? If so, then: server.listGroupResult.get(i) is an arraylist. If so, ... |
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inList.add(new InventoryPlusColor(1, "Couch", 3, 1250.00, "Blue")); inList.add(new InventoryPlusColor(2, "Recliner", 10, 525.00, "Green")); inList.add(new InventoryPlusColor(3, "Chair", 6, 125.00, "Mahogany")); inList.add(new InventoryPlusColor(4, "Pedestal Table", 2, 4598.00, "Oak")); inList.add(new InventoryPlusColor(5, "Sleeper Sofa", 4, 850.00, "Yellow")); inList.add(new InventoryPlusColor(6, "Rocking Chair", 2, 459.00, "Tweed")); inList.add(new InventoryPlusColor(7, "Couch", 4, 990.00, "Red")); inList.add(new InventoryPlusColor(8, "Chair", 12, 54.00, "Pine")); inList.add(new InventoryPlusColor(9, "Ottoman", 3, 110.00, "Black")); inList.add(new InventoryPlusColor(10, "Chest of ... |
A binary search is pretty efficient. Searches will be O(logN) where N is the number of elements in the list. Maybe something else (e.g., a hashtable) would be faster, but maybe not. If I were you I wouldn't worry about it until you get some evidence that it's really a problem. Your logic is off, however. If you want search() to ... |
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static public void getContents(File existingFile) { StringBuffer contents = new StringBuffer(); BufferedReader input = null; int line_number = 0; int number_of_records = 0; String snomedCodes = null; try { input = new BufferedReader( new FileReader(existingFile) ); String current_line = null; while (( current_line = input.readLine()) != null) { // Create a pattern to match for the "\" Pattern p = Pattern.compile("\\\\"); ... |
Hi there, I have a class called Product that describes the charactristics of products such as name, id, price etc. I have all the set and get methods in my Product class. I store the information about my products into an ArrayList. I then write the information about my products in a file. so far so good but... I now want ... |