Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.HashSet;

import java.util.Map;
import java.util.Set;

public class Main {
    public static <K, E> Set<E> getSetInitIfEmpty(Map<K, Set<E>> map, K key) {
        Set<E> value = map.get(key);
        if (value == null) {
            value = new HashSet<E>();
            map.put(key, value);
        }
        return value;
    }
}