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POSorting strings by the numbers of characters
 

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    <p>I have a problem. I want to sort Strings from txt file by the numbers of characters in String For example Input: aaa a aa Output: a aa aaa I created Collection that contain strings by alphabet &amp; created collection that contain number of String characters, but i can't understand </p> <p>How I can sort by the numbers of characters in String</p> <pre><code>public class SortingFile { public static void main(String[] args) throws IOException { try{ File inputFile=new File("c:/a.txt"); Reader r=new FileReader(inputFile); BufferedReader br=new BufferedReader(r); List &lt;String&gt; list = new LinkedList&lt;String&gt;(); List &lt;Integer&gt; listLength= new LinkedList&lt;Integer&gt;(); String line=br.readLine(); list.add(line); while (line!=null){ line=br.readLine(); list.add(line); } int arrsize=(list.size())-1; System.out.println("line array size= "+arrsize); list.remove(arrsize); //delete last element (he is null ) System.out.println("Before sorting by alphabet: "+list); Collections.sort(list);//sorting by alphabet System.out.println("After sorting by alphabet: " +list); for (int i=0;i!=list.size();i++){ //add string lenght to collection String a=list.get(i); int aa=a.length(); listLength.add(aa); } System.out.println("lineLength:"+listLength); Collections.sort(listLength); // sotring by asc System.out.println("lineLength2:"+listLength); br.close(); }catch (FileNotFoundException e1){ System.out.println("File ''a.txt'' Not Found :("); e1.printStackTrace(); } } } </code></pre>
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