java-8/java-8/src/com/learnJava/qAnda/StudentsQuestion1.java at master · trishu/java-8

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package com.learnJava.qAnda;

import com.learnJava.data.Student;

import java.util.*;

import java.util.function.Function;

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

public class StudentsQuestion1 {

public static void main(String[] args) {

List<String> words = Arrays.asList("Zohne", "Redy", "Zohne", "Redy", "Stome","Redy");

System.out.println(words.stream()

.collect(groupingBy(s->s,counting()))

.entrySet().stream().max(((o1, o2) -> o1.getValue() > o2.getValue() ? 1 : -1)).get().getKey());

System.out.println(words.stream()

.collect(groupingBy(s->s,counting()))

.entrySet().stream().min(((o1, o2) -> o1.getValue() > o2.getValue() ? 1 : -1)).get().getKey());

Map<String, Long> frequentChars = words.stream()

.collect(groupingBy(Function.identity(),counting()));

System.out.println(frequentChars);

}