Split sentence by words count in Java

Question

How can I split a sentence into two groups with equal number of words?

 Sentence(odd words count) :
         This is a sample sentence
 Output: part[0] = "This is a "
         part[1] = "sample sentence"

Sentence(even words count) : 
        This is a sample sentence two
 Output: part[0] = "This is a "
         part[1] = "sample sentence two"

I tried to split the whole sentence into words, getting the index of ((total number of spaces / 2) + 1)th empty space and apply substring. But it is quite messy and I was unable to get the desired result.

The following link might help you. http://stackoverflow.com/questions/25853393/split-a-string-in-java-into-equal-length-substrings-while-maintaining-word-bound — user6837640, Sep 18 '16 at 18:13
It should be like part[0] = even, part[1]=odd, i have shown in my question. — Kushal, Sep 18 '16 at 18:52
Have you actually tried anything before coming here? If so, what have you tried? And what about it is not working? — Joe C, Sep 18 '16 at 19:29

score 2 · Answer 1 · answered Sep 18 '16 at 18:49

Pretty simple solution using Java8

    String[] splitted = test.split(" ");
    int size = splitted.length;
    int middle = (size / 2) + (size % 2);
    String output1 =  Stream.of(splitted).limit(middle).collect(Collectors.joining(" "));
    String output2 =  Stream.of(splitted).skip(middle).collect(Collectors.joining(" "));
    System.out.println(output1);
    System.out.println(output2);

Output on the 2 test strings is:

This is a
sample sentence
This is a
sample sentence two

Yeah its pretty clean but I have to use Java 7 or less – Kushal Sep 23 '16 at 04:00 — Kushal, Sep 23 '16 at 04:00

Kelvin · Answer 2 · 2016-09-18T18:59:35.120

0

String sentence = "This is a sample sentence";

String[] words = sentence.split(" +"); // Split words by spaces
int count = (int) ((words.length / 2.0) + 0.5); // Number of words in part[0]
String[] part = new String[2];
Arrays.fill(part, ""); // Initialize to empty strings
for (int i = 0; i < words.length; i++) {
    if (i < count) { // First half of the words go into part[0]
        part[0] += words[i] + " ";
    } else { // Next half go into part[1]
        part[1] += words[i] + " ";
    }
}
part[1] = part[1].trim(); // Since there will be extra space at end of part[1]

edited Sep 18 '16 at 18:59

answered Sep 18 '16 at 18:39

Kelvin

574
3
13

I think if words count is even in sentence your code not working correctly. – Afsun Khammadli Sep 18 '16 at 18:58
Thanks, I fixed it. – Kelvin Sep 18 '16 at 19:01
I don't have multiple spaces in my sentences, this also works thanks – Kushal Sep 23 '16 at 04:01

Afsun Khammadli · Accepted Answer · 2016-09-19T05:44:37.823

String sentence ="This is a simple sentence";
String[] words = sentence.split(" ");

double arrayCount=2;
double firstSentenceLength = Math.ceil(words.length/arrayCount);
String[] sentences = new String[arrayCount];
String first="";
String second="";

for(int i=0; i < words.length; i++){
      if(i<firstSentenceLength){
          first+=words[i]+ " ";
      }else{
          second+=words[i]+ " ";
      }
}
sentences[0]=first;
sentences[1]=second;

I hope this help you.

Split sentence by words count in Java

3 Answers3