java_upgrade/src/main/java/io/ProcessDictionary.java at master · FUTRFUNC/java_upgrade · GitHub

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package io;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Comparator;

import java.util.Map;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import static java.util.stream.Collectors.counting;

import static java.util.stream.Collectors.groupingBy;

public class ProcessDictionary {

private Path dictionary = Paths.get("/usr/share/dict/words");

public void printTenLongestWords() {

System.out.println("\nTen Longest Words:");

try (Stream<String> lines = Files.lines(dictionary)) {

lines.filter(s -> s.length() > 20)

.sorted(Comparator.comparingInt(String::length).reversed()

//.thenComparing(Comparator.reverseOrder()))

)

.limit(10)

.forEach(w ->

System.out.printf("%s (%d)%n", w, w.length()));

} catch (IOException e) {

e.printStackTrace();

}

public void printWordsOfEachLength() {

System.out.println("\nList of words of each length:");

try (Stream<String> lines = Files.lines(dictionary)) {

lines.filter(s -> s.length() > 20)

.collect(Collectors.groupingBy(String::length)) // Map<Integer,List<String>>

.forEach((len, wordList) -> System.out.println(len + ": " + wordList));

} catch (IOException e) {

e.printStackTrace();

}

public void printHowManyWordsOfEachLength() {

System.out.println("\nNumber of words of each length:");

try (Stream<String> lines = Files.lines(dictionary)) {

lines.filter(s -> s.length() > 20)

.collect(Collectors.groupingBy(String::length, Collectors.counting())) // Map<Integer,Long>

.forEach((len, num) -> System.out.printf("%d: %d%n", len, num));

} catch (IOException e) {

e.printStackTrace();

}

public void printSortedMapOfWords() {

System.out.println("\nNumber of words of each length (desc order):");

try (Stream<String> lines = Files.lines(dictionary)) {

Map<Integer, Long> map = lines.filter(s -> s.length() > 20)

.collect(groupingBy(String::length, counting()));

map.entrySet().stream()

.sorted(Map.Entry.comparingByKey(Comparator.reverseOrder()))

.forEach(e -> System.out.printf("Length %d: %d words%n", e.getKey(), e.getValue()));

} catch (IOException e) {

e.printStackTrace();

}

public void printSortedMapOfWordsUsingBufferedReader() {

System.out.println("\nNumber of words of each length (desc order):");

try (Stream<String> lines =

new BufferedReader(new FileReader("/usr/share/dict/words")).lines()) {

Map<Integer, Long> map = lines.filter(s -> s.length() > 20)

.collect(groupingBy(String::length, counting()));

map.entrySet().stream()

.sorted(Map.Entry.comparingByKey(Comparator.reverseOrder()))

.forEach(e -> System.out.printf("Length %d: %d words%n", e.getKey(), e.getValue()));

} catch (IOException e) {

e.printStackTrace();

}

public static void main(String[] args) {

ProcessDictionary processDictionary = new ProcessDictionary();

processDictionary.printTenLongestWords();

processDictionary.printWordsOfEachLength();

processDictionary.printHowManyWordsOfEachLength();

processDictionary.printSortedMapOfWords();

processDictionary.printSortedMapOfWordsUsingBufferedReader();

}

java_upgrade/src/main/java/io/ProcessDictionary.java at master · FUTRFUNC/java_upgrade · GitHub

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