Split a string in list array

Question

How can I split each of the sentence in the arraylist? what i'm trying to make is, a different set of sentence to be splitted and shuffle, and student will arrange it in correct order

public class QuestionActivity1 extends AppCompatActivity { private int presCounter = 0; private int maxpresCounter; private List<QuestionModel1> list; TextView textScreen, textQuestion, textTitle; Button submitBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_question1); Toolbar toolbar=findViewById(R.id.toolbar); setSupportActionBar(toolbar); submitBtn=(Button) findViewById(R.id.submitBtn); list=new ArrayList<>(); list.add(new QuestionModel1("The kids are playing")); list.add(new QuestionModel1("The kids are sleeping")); list.add(new QuestionModel1("The kids are dancing")); keys=shuffleArray(keys); for (String key : keys){ addView(((LinearLayout) findViewById(R.id.layoutParent)), key, ((EditText) findViewById(R.id.editText))); } maxpresCounter= keys.length; }

I can only try one

private String sentence="The kids are playing"; private String[] keys=sentence.split(" ");

QuestionModel Class

public class QuestionModel1 { private String sentence; public QuestionModel1(String sentence) { this.sentence = sentence; } public String getSentence() { return sentence; } public void setSentence(String sentence) { this.sentence = sentence; } }

Can you provide your QuestionModel1 class, or at least a part of it? What are the getter methods of the class called? — BigBeef
– BigBeef, Commented Nov 4, 2022 at 23:29

BigBeef · Accepted Answer · 2022-11-05 00:20:51Z

 for (QuestionModel1 questionModel1 : list) { String sentence = questionModel1.getSentence(); String[] keys = sentence.split(" "); // do what you need below for each key. // shuffleArray(keys); <--- A stab at what you need ??? }

Something like this?

jure · Accepted Answer · 2022-11-04 23:42:21Z

So, assuming we have the following array list:

List<QuestionModel1> list = new ArrayList(); list.add(new QuestionModel1("The kids are playing")); list.add(new QuestionModel1("The kids are sleeping")); list.add(new QuestionModel1("The kids are dancing"));

you could split it with the following snippet, assuming you're using at least Java 8

List<List<String>> newList = list.stream() .map(item -> Arrays.asList(item.getSentence().split(" "))) .collect(Collectors.toList());

and this would yield the following List<List<String>> as a result

[[The, kids, are, playing],[The, kids, are, sleeping],[The, kids, are, dancing]]

Now, if you just want the words in one long list (including duplicates), you could just add one additional .flatMap(...) operation

List<String> keys = list.stream() .map(item -> Arrays.asList(item.getSentence().split(" "))) .flatMap(Collection::stream) .collect(Collectors.toList());

which would yield the following List<String> as a result:

[The, kids, are, playing, The, kids, are, sleeping, The, kids, are, dancing]

This isn't the only approach (you could use .reduce(...) instead of .flatMap(...), for example), but it should fit your problem.

and how can i implement that in this for (String key : keys){ addView(((LinearLayout) findViewById(R.id.layoutParent)), key, ((EditText) findViewById(R.id.editText))); }

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