Example usage for java.util WeakHashMap putAll

Introduction

In this page you can find the example usage for java.util WeakHashMap putAll.

Prototype

public void putAll(Map<? extends K, ? extends V> m) 

Source Link

Document

Copies all of the mappings from the specified map to this map.

Usage

From source file:Main.java

public static void main(String[] args) {
    WeakHashMap<String, String> weakHashMapOne = new WeakHashMap<String, String>();
    WeakHashMap<String, String> weakHashMapTwo = new WeakHashMap<String, String>();

    System.out.println("Populating two Maps");

    weakHashMapOne.put("1", "first");
    weakHashMapOne.put("2", "two");
    weakHashMapOne.put("3", "from java2s.com");

    weakHashMapTwo.put("1", "1st");
    weakHashMapTwo.put("2", "2nd");
    weakHashMapTwo.put("3", "3rd");

    // checking Map
    System.out.println("Before - Map 1: " + weakHashMapOne);
    System.out.println("Before - Map 2: " + weakHashMapTwo);

    // putting map 2 into map1
    weakHashMapOne.putAll(weakHashMapTwo);

    System.out.println("After - Map 1: " + weakHashMapOne);
    System.out.println("After - Map 2: " + weakHashMapTwo);
}

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From source file:MethodHashing.java

public static long calculateHash(Method method) {
    Map methodHashes = (Map) hashMap.get(method.getDeclaringClass());

    if (methodHashes == null) {
        methodHashes = getInterfaceHashes(method.getDeclaringClass());

        // Copy and add
        WeakHashMap newHashMap = new WeakHashMap();
        newHashMap.putAll(hashMap);
        newHashMap.put(method.getDeclaringClass(), methodHashes);
        hashMap = newHashMap;//from  w  ww.j  ava  2  s  .co m
    }

    return ((Long) methodHashes.get(method.toString())).longValue();
}

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