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    <p>I've changed your code to work:</p> <pre><code>import java.util.*; import java.lang.Iterable; public class Main { String words; public static void main(String[] args) { Main plato = new Main( "You can discover more about a person in an hour of play than in a year of conversation"); Main roosevelt = new Main( "When you play play hard when you work dont play at all"); String[] platoArray = plato.getWordArray(); String[] rooseveltArray = roosevelt.getWordArray(); plato.printArray(platoArray); roosevelt.printArray(rooseveltArray); System.out.println("____________________________________________________"); HashSet&lt;String&gt; rooseveltWordSet = roosevelt.getWordSet(platoArray); roosevelt.printArray(rooseveltWordSet); System.out.println("____________________________________________________"); roosevelt.printArray(roosevelt.getWordCounts()); System.out.println("____________________________________________________"); } public Main(String word) { words = word.toLowerCase(); } protected String[] getWordArray() { String[] wordArray = words.split(" "); return wordArray; } protected HashSet&lt;String&gt; getWordSet(String[] groupedWords) { HashSet&lt;String&gt; wordSet = new HashSet&lt;String&gt;(); for (String string : groupedWords) { wordSet.add(string); } String[] wordArray = getWordArray(); for (String string : wordArray) { wordSet.add(string); } return wordSet; } protected void printArray(String[] array) { for (String string : array) { System.out.println(string); } } protected void printArray(HashSet&lt;String&gt; hashWords) { for(String hashset: hashWords) { System.out.println(hashset); } } /*Changed*/ protected void printArray(HashMap&lt;String, Integer&gt; printHashMap) { for(String string: printHashMap.keySet()) { System.out.println(string + ":" + printHashMap.get(string) ); } } /*changed*/ protected HashMap&lt;String, Integer&gt; getWordCounts() { String[] wordArray = getWordArray(); HashMap&lt;String, Integer&gt; wordCounts = new HashMap&lt;String, Integer&gt;(); for(String string: wordArray) { if(wordCounts.containsKey(string)){ wordCounts.put(string, wordCounts.get(string) + 1); }else{ wordCounts.put(string, 1); } } return wordCounts; } } </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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