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POconvert input string to 2 dimension array then extract it using an index file
 

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  1. POconvert input string to 2 dimension array then extract it using an index file
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    <p>Here is what I am trying to do, say I have an input file (input.txt) in this format, the number of rows or columns can be different, columns are separated by spaces:</p> <pre><code>the DT B-NP current JJ I-NP account NN I-NP deficit NN I-NP will MD B-VP &lt;&lt; CURRENT TOKEN narrow VB I-VP to TO B-PP only RB B-NP </code></pre> <p>I want to get each word into an element of a 2 dimension array x[i,j] so that, I can use an index file:</p> <pre><code>x[0,0] x[0,1] x[-1,0] x[-2,1] </code></pre> <p>to get this result:</p> <pre><code>will MD deficit NN </code></pre> <p>With the number in the bracket is the i,j index of the array, the starting position [0,0] is the first word of the line that marked by "&lt;&lt; CURRENT TOKEN" (in this case is word "will" ).</p> <p>So now I can read the file to array by:</p> <pre><code>import java.awt.List; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; public class ReadfileIntoArray { String[] data = new String[100]; public void read() throws IOException { FileReader fr = new FileReader("/Users/home/Documents/input.txt"); BufferedReader br = new BufferedReader(fr); String line; System.out.println("Print from here:"); int i = 0; while ((line = br.readLine()) != null) { data[i] = line; System.out.println(data[i]); i++; } br.close(); // This is for resize the data array (and data.length reflect new size) String[] dataNew = new String[i]; System.arraycopy(data, 0, dataNew, 0, i); data = dataNew; System.out.println("Data length: " + data.length); } public static void main(String[] args) throws IOException { ReadfileIntoArray rfta = new ReadfileIntoArray(); rfta.read(); } } </code></pre> <p>But as I searched, I might need to use </p> <pre><code>List&lt;String&gt; arrList =FileUtils.readLines(new File("myfile.txt")); </code></pre> <p>for undefined length (??) not very sure but I think need to import special package to use it, I got error <em>_</em> Second thing is how to determined the starting element at position [0,0], and how to indicate negative index like [-2,1]...</p> <p>How can I managed to do the task above, it look quite complicated for me. Thanks alot !</p>
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    1. USuser1314404
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    1. CODo you really have to use negative indices? That can be confusing (as well as lead to more code).
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      1. USLews Therin
    2. COIs ` << CURRENT TOKEN` also part of text file used to indicate [0,0] position? Shouldn't be placed in array? Or maybe you want to set [0,0] manually?
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      1. USPshemo
    3. COYes, it is also a part of the text file, so I guess, need to use string comparison here to know the [0,0] position. And to know the index in the bracket how do you think is the best way ? May be regular expression ?
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      1. USuser1314404
 

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