Answer Happy

I have this problem that I need help with. Here is the
question.
4-map
Implement constructor and lookupBigram according to todos
Here's the given code:
import java.util.*;
public class Bigrams {
public static class Pair {
public T1 first;
public T2 second;
public Pair(T1 first, T2 second)
{
this.first =
first;
this.second =
second;
}
}
protected Map, Float> bigramCounts;
protected Map unigramCounts;
// TODO: Given filename fn, read in the file word
by word
// For each word:
// 1. call process(word)
// 2. increment count of that word in
unigramCounts
// 3. increment count of new Pair(prevword, word) in
bigramCounts
public Bigrams(String fn) {
}
// TODO: Given words w1 and w2,
// 1. replace w1 and w2 with process(w1) and
process(w2)
// 2. print the words
// 3. if bigram(w1, w2) is not found, print "Bigram
not found"
// 4. print how many times w1 appears
// 5. print how many times (w1, w2) appears
// 6. print count(w1, w2)/count(w1)
public float lookupBigram(String w1, String w2)
{
return (float) 0.0;
}
protected String process(String str) {
return
str.toLowerCase().replaceAll("[^a-z]", "");
}
public static void main(String[] args) {
if (args.length != 1) {

System.out.println("Usage: java Bigrams ");

System.out.println(args.length);
return;
}
Bigrams bg = new
Bigrams(args[0]);
List> wordpairs =
Arrays.asList(
new Pair("with",
"me"),
new Pair("the",
"grass"),
new Pair("the",
"king"),
new Pair("to",
"you")
);
for (Pair p : wordpairs) {

bg.lookupBigram(p.first, p.second);
}
System.out.println(bg.process("adddaWEFEF38234---+"));
}
}
Please help with this assignment. Use Java language only and use
travis-ci to test the code by compiling and running the code.
Please give the output as well. Also write comments to what each
part of the code does. I need to hand this in by this week.