Get string between two strings in java

substringBetween.js

import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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/**
 *
 * @author ASUS
 */

public class HelloWorld{
    
    public static final int INDEX_NOT_FOUND = -1;
    
     public static void main(String []args){
        String name[] = new String[1000];
        Pattern pattern = Pattern.compile("##(.*?)##", Pattern.DOTALL);
        Matcher matcher = pattern.matcher("Hello ##wkwkwk## ##Ngamkakwk##");
        int i = 0;
        
        while (matcher.find()) {
            name[i++] = matcher.group(1);
        }
        
        name = Arrays.stream(name)
            .filter(s -> (s != null && s.length() > 0))
            .toArray(String[]::new); 
       
        System.out.println(name.length);
     }
}