Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.HashMap;

import java.util.Map;

public class Main {
    public static <K, V> Map<K, V> copyNullSafeMutableHashMap(Map<? extends K, ? extends V> map) {
        if (map == null)
            throw new NullPointerException("map");

        Map<K, V> result = new HashMap<K, V>(map);
        for (Map.Entry<K, V> entry : result.entrySet()) {
            if (entry.getKey() == null)
                throw new NullPointerException("entry.getKey()");
            if (entry.getValue() == null)
                throw new NullPointerException("entry.getValue()");
        }
        return result;
    }
}