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Trying to separate a txt file into two ArrayLists?

This image is a text file I need to separate by date and the digits alongside it
BufferedReader wordReader = new BufferedReader(new FileReader("\\Users\\rosha\\eclipse-workspace\\working\\src\\workingfix\\spx_data_five_years.txt"));
ArrayList<String> spxIndex = new ArrayList<>();
ArrayList<String> date = new ArrayList<>();
//populating the Array with the file
String line = wordReader.readLine();
while (line != null) {
date.add(line);
line = wordReader.readLine();
}
wordReader.close();
Would really love to understand how to separate this file into two Arrays. Been at it for a while and some Guidance in the right direction would be incredible. Apologies if it's a simple solution for some reason I'm having trouble getting started.
Here is the some of the Text File, if I can get guidance on this I'll be in good shape
1/4/2010 1132.99
1/5/2010 1136.52
1/6/2010 1137.14
1/7/2010 1141.69
1/8/2010 1144.98
1/11/2010 1146.98
1/12/2010 1136.22
1/13/2010 1145.68

Your two examples are a little bit different, in the Image, it seems like the entries are separated by a tab. In your text example, the entries are separated by a space. If they are separated by a space, a simple String[] splitter = line.split(" "); suffices. This gives you the result as an Array, which you can write in the ArrayLists.

Here is the solution, using split method
public static void main(String[] args) throws IOException {
ArrayList<String> spxIndex = new ArrayList<>();
ArrayList<String> date = new ArrayList<>();
String sCurrentLine;
BufferedReader br = new BufferedReader(new FileReader("\\Users\\rosha\\eclipse-workspace\\working\\src\\workingfix\\spx_data_five_years.txt"));
while ((sCurrentLine = br.readLine()) != null) {
String[] lineValues = sCurrentLine.split(" ");
date.add(lineValues[0]);
spxIndex.add(lineValues[1]);
}
br.close();
System.out.println(date);
System.out.println(spxIndex);
}

how to save contents of a file as single string using java

I am trying to extract a specific content from text file by using delimiters. This is my code :
File file = new File("C:\\Inputfiles\\message.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
String st;
while ((st=br.readLine()) != null) {
String[] strings = StringUtils.split(st, "------------");
System.out.println(strings);}
But as a result, each and everyline is getting splitted by delimiter and saved as array.
Can anyone suggest how I can save the contents from file as a single string, so I can get limited number of lines only as Array.

You can use StringBuilder or StringBuffer to do that.
File file = new File("C:\\Inputfiles\\message.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
String st;
while ((st=br.readLine()) != null) {
String[] strings = StringUtils.split(st, "------------");
StringBuilder singleString = new StringBuilder();
for(String s : strings){
singleString.append(s);
}
System.out.println(singleString.toString());
}

Thanks All,
I did using below changes
String contents = new String(Files.readAllBytes(Paths.get("C:\\Inputfiles\\message1.txt")));
String[] splitted = StringUtils.split(contents, "-------");
for(int i=0;i<splitted.length;i++)
System.out.println(splitted[i]);

ArrayList to Array

How do I convert this ArrayList's value into an array? So it can look like,
String[] textfile = ... ;
The values are Strings (words in the text file), and there are more than a 1000 words. In this case I cannot do the, words.add("") 1000 times. How can I then put this list into an array?
public static void main(String[]args) throws IOException
{
Scanner scan = new Scanner(System.in);
String stringSearch = scan.nextLine();
List<String> words = new ArrayList<String>(); //convert to array
BufferedReader reader = new BufferedReader(new FileReader("File1.txt"));
String line;
while ((line = reader.readLine()) != null) {
words.add(line);
}

You can use
String[] textfile = words.toArray(new String[words.size()]);
Relevant Documentation
List#toArray(T[])

words.toArray() should work fine.
List<String> words = new ArrayList<String>();
String[] wordsArray = (String[]) words.toArray();

you can use the toArray method of Collection such as shown here
Collection toArray example

List<String> words = new ArrayList<String>();
words.add("w1");
words.add("w2");
String[] textfile = new String[words.size()];
textfile = words.toArray(textfile);

Text processing in java android

I have a file that looks similar to this
12345 one
12345 two
12345 three
.......
Question is how can i get all of the values from second row and store them in a String[]
i know how to read file in java just dont know how to cut the second row

1. Store Each line from the file into an ArrayList<String>, its more flexible than String[] array.
2. Then access the line you need by get() method of ArrayList
Eg:
ArraList<String> arr = new ArrayList<String>();
//Now add each lines into this arr ArrayList
arr.get(1); // Getting the Second Line from the file
`

You can split the file line by new line.
String [] names = fileString.split("\n");

Ok this is what i did but it skips first line
FileInputStream fstream = new FileInputStream("/sys..........");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
strLine = br.readLine();
while ((strLine = br.readLine()) != null) {
delims = strLine.split(" ");
first = delims[1];
where.add(first);
}
in.close();
From example above it contains only "two" and "three"

How to read a String (file) to array in java

Suppose there is a file named as SUN.txt
File contains : a,b,dd,ss,
I want to make dynamic array depending upon the number of attributes in file.
If ther is a char after comma then array will be of 0-4 i.e of length 5.
In the above mentioned case there is no Char which returns 0-3 Array of length 4. I want to read the NULL after comma too.
How do i do that?
Sundhas

You should think about
Reading the file into a String
Splitting the file by separator ','
Using a list for adding the characters and convert the list to an array, when the list is filled

As Markus said, you want to do something like this..
//Create a buffred reader so that you can read in the file
BufferedReader reader = new BufferedReader(new FileReader(new File(
"\\SUN.txt")));
//The StringBuffer will be used to create a string if your file has multiple lines
StringBuffer sb = new StringBuffer();
String line;
while((line = reader.readLine())!= null)
{
sb.append(line);
}
//We now split the line on the "," to get a string array of the values
String [] store = sb.toString().split(",");
I do not quite understand why you would want the NULL after the comma? I am assuming that you mean after the last comma you would like that to be null in your array? I do not quite see the point in that but that is not what the question is.
If that is the case you wont read in a NULL, if after the comma there was a space, you could read that in.
If you would like a NULL you would have to add it in yourself at the end so you could do something like
//Create a buffred reader so that you can read in the file
BufferedReader reader = new BufferedReader(new FileReader(new File(
"\\SUN.txt")));
//Use an arraylist to store the values including nulls
ArrayList<String> store = new ArrayList<String>();
String line;
while((line = reader.readLine())!= null)
{
String [] splitLine = line.split(",");
for(String x : splitLine)
{
store.add(line);
}
//This tests to see if the last character of the line is , and will add a null into the array list
if(line.endsWith(","))
store.add(null);
}
String [] storeWithNull = store.toArray();

Well if you want want to simply open the file and store the content in a array of string then
1) open the file into a string
2) split the string using a regex "," http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#split(java.lang.String)
but I'm curious why you can't use a String file directly ?

For your datatructure, use a list of arrays. Each list entry is a line of your textfile, each entry is an array that holds the comma separated values:
List<String[]> data = new ArrayList<String[]>();
String line = readNextLine(); // custom method, to be implemented
while (line != null) {
data.add(line.split(","));
line = readNextLine();
}
(assuming, your file contains 1..n lines of comma separated values)
You may want to have it like this:
"a,b,c,d," -> {"a", "b", "c", "d", null}
Here's a suggestion how to solve that problem:
List<String[]> data = new ArrayList<String[]>();
String line = readNextLine(); // custom method, to be implemented
while (line != null) {
String[] values = new String[5];
String[] pieces = line.split(",");
for (int i = 0; i<pieces.length; i++)
values[i] = pieces[i];
data.add(values);
line = readNextLine();
}

its seems like a CSV file something like this will work assuming it has 5 lines and 5 values
String [][] value = new String [5][5];
File file = new File("SUN.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
String line = null;
int row = 0;
int col = 0;
while((line = br.readLine()) != null ){
StringTokenizer s = new StringTokenizer(line,",");
while (s.hasMoreTokens()){
value[row][col] = s.nextToken();
col++;
}
col = 0;
row++;
}
i havent tested this code

Read the file, using BufferedReader, one line at the time.
Use split(",", -1) to convert to an array of String[] including also empty strings beyond the last comma as part of your array.
Load the String[] parts into a List.