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CSE142 Sample File-Processing Program handout #12
Sample Log of Execution
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This program will allow you to search the
imdb top 250 movies for a particular phrase.
search phrase? 1939
# Rating Votes Title
129 8.2 75628 Mr. Smith Goes to Washington (1939)
159 8.1 210612 Gone with the Wind (1939)
212 8.0 285213 The Wizard of Oz (1939)
3 matches
Second Log of Execution
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This program will allow you to search the
imdb top 250 movies for a particular phrase.
search phrase? kill
# Rating Votes Title
83 8.3 209431 To Kill a Mockingbird (1962)
171 8.1 718451 Kill Bill: Vol. 1 (2003)
2 matches
First 25 Lines of Data File imdb.txt
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1 1649756 9.2 The Shawshank Redemption (1994)
2 1129349 9.2 The Godfather (1972)
3 770838 9.0 The Godfather: Part II (1974)
4 1634880 8.9 The Dark Knight (2008)
5 843802 8.9 Schindler's List (1993)
6 434428 8.9 12 Angry Men (1957)
7 1292945 8.9 Pulp Fiction (1994)
8 1187195 8.9 The Lord of the Rings: The Return of the King (2003)
9 491819 8.9 The Good, the Bad and the Ugly (1966)
10 1312700 8.8 Fight Club (1999)
11 1210687 8.8 The Lord of the Rings: The Fellowship of the Ring (2001)
12 815133 8.7 Star Wars: Episode V - The Empire Strikes Back (1980)
13 1215769 8.7 Forrest Gump (1994)
14 1429053 8.7 Inception (2010)
15 1073674 8.7 The Lord of the Rings: The Two Towers (2002)
16 664803 8.7 One Flew Over the Cuckoo's Nest (1975)
17 711024 8.7 Goodfellas (1990)
18 1188482 8.7 The Matrix (1999)
19 224125 8.7 Seven Samurai (1954)
20 888754 8.6 Star Wars (1977)
21 521616 8.6 City of God (2002)
22 997489 8.6 Se7en (1995)
23 863179 8.6 The Silence of the Lambs (1991)
24 269440 8.6 It's a Wonderful Life (1946)
25 723426 8.6 The Usual Suspects (1995)
Program File Movies.java
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// This program prompts for a phrase and it prints all movies from the
// imdb top-250 database that contain the phrase.
import java.io.*;
import java.util.*;
public class Movies {
public static void main(String[] args) throws FileNotFoundException {
Scanner input = new Scanner(new File("imdb.txt"));
Scanner console = new Scanner(System.in);
giveIntro();
System.out.print("search phrase? ");
String phrase = console.nextLine().toLowerCase();
String line = find(input, phrase);
int count = 0;
if (line.length() > 0) {
System.out.println("#\tRating\tVotes\tTitle");
while (line.length() > 0) {
print(line);
line = find(input, phrase);
count++;
}
}
System.out.println(count + " matches");
}
// introduces the program to the user
public static void giveIntro() {
System.out.println("This program will allow you to search the");
System.out.println("imdb top 250 movies for a particular phrase.");
System.out.println();
}
// searches for and returns the next line of the given input that contains
// the given phrase; returns an empty string if not found
public static String find(Scanner input, String phrase) {
while (input.hasNextLine()) {
String line = input.nextLine();
if (line.toLowerCase().contains(phrase)) {
return line;
}
}
return "";
}
// Prints the rank, rating, votes, and title separated by tabs for the
// given line of the input file
public static void print(String line) {
Scanner data = new Scanner(line);
int rank = data.nextInt();
int votes = data.nextInt();
double rating = data.nextDouble();
System.out.print(rank + "\t" + rating + "\t" + votes + "\t");
while (data.hasNext()) {
System.out.print(data.next() + " ");
}
System.out.println();
}
}
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