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    copied!<p>You can have a HashMap with key as (Questions,Answers..) and ArrayList as value</p> <pre><code>HashMap &lt;String,ArrayList&lt;String&gt;&gt; array = new HashMap&lt;String,ArrayList&lt;String&gt;&gt;(); if(array.containsKey("Question")){ array.get("Question").add(sCurrentLine.split(":")[1]); }else{ ArrayList&lt;String&gt; questions = new ArrayList&lt;String&gt;(); questions.add(sCurrentLine.split(":")[1]); array.put("Question",questions ); } </code></pre> <p>Modification In your Code</p> <pre><code>public static void OpenFile() { HashMap &lt;String,ArrayList&lt;String&gt;&gt; array = new HashMap&lt;String,ArrayList&lt;String&gt;&gt;(); int retrival = chooser.showOpenDialog(null); if (retrival == JFileChooser.APPROVE_OPTION) { try (BufferedReader br = new BufferedReader(new FileReader( chooser.getSelectedFile()))) { String sCurrentLine; while ((sCurrentLine = br.readLine()) != null) { if (sCurrentLine.equals("")) { continue; } else if (sCurrentLine.startsWith("Question")) { System.out.println(sCurrentLine.split(":")[1]); if(array.containsKey("Question")){ array.get("Question").add(sCurrentLine.split(":")[1]); }else{ ArrayList&lt;String&gt; questions = new ArrayList&lt;String&gt;(); questions.add(sCurrentLine.split(":")[1]); array.put("Question",questions ); } //add to [0] in array ArrayList } else if (sCurrentLine.startsWith("Answer")) { System.out.println(sCurrentLine.split(":")[1]); //add to [1] in array ArrayList //Do the same as above if condition with Answer as Key } else if (sCurrentLine.startsWith("Category")) { System.out.println(sCurrentLine.split(":")[1]); //add to [2] in array ArrayList } else if (sCurrentLine.startsWith("Essay")) { System.out.println(sCurrentLine.split(":")[1]); //add to [3] in array ArrayList } } } catch (Exception ex) { ex.printStackTrace(); } } } </code></pre>
 

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