GTU OOP Program - 25
25). Write a program that reads words from a text file and displays all the nonduplicate words in descending order.The text file is passed as a command-line argument.
import java.io.*;
import java.util.*;
class Program_25 {
public static void main(String[] args) throws Exception {
File fin = new File(args[0]);
BufferedReader br = new BufferedReader(new FileReader(fin));
StringBuffer buffer = new StringBuffer();
String str;
while ((str = br.readLine()) != null) { // reading the text file
buffer.append(str); // storing text in StringBuffer
buffer.append(" "); // Separating words by spaces
}
ArrayList list = new ArrayList(); // Declaring ArrayList
StringTokenizer st = new StringTokenizer(buffer.toString().toLowerCase());
while (st.hasMoreTokens()) { // creating a list of words
String s = st.nextToken();
list.add(s);
}
HashSet set = new HashSet(list); // it is created to avoid duplicate
List arrayList = new ArrayList(set); // creating list of words
Comparator c = Collections.reverseOrder();
Collections.sort(arrayList, c);
for (Object obj : arrayList) {
System.out.println(obj.toString()); // displaying content
}
}
}
Input.txt file
Output
Comments