How do you write a Java code to find number of duplicate words in a sentence?

Answer 1

As mentioned by others use String::split(), followed by some map (hashmap or linkedhashmap) and then merge your result. For completeness sake putting the code.

import java.util.*;

public class Genric<E>

{

public static void main(String[] args)

{

Map<String, Integer> unique = new LinkedHashMap<String, Integer>();

for (String string : "House, House, House, Dog, Dog, Dog, Dog".split(", ")) {

if(unique.get(string) == null)

unique.put(string, 1);

else

unique.put(string, unique.get(string) + 1);

}

String uniqueString = join(unique.keySet(), ", ");

List<Integer> value = new ArrayList<Integer>(unique.values());

System.out.println("Output = " + uniqueString);

System.out.println("Values = " + value);

}

public static String join(Collection<String> s, String delimiter) {

StringBuffer buffer = new StringBuffer();

Iterator<String> iter = s.iterator();

while (iter.hasNext()) {

buffer.append(iter.next());

if (iter.hasNext()) {

buffer.append(delimiter);

}

}

return buffer.toString();

}

}