Example usage for java.util IdentityHashMap putAll

Introduction

In this page you can find the example usage for java.util IdentityHashMap 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[]) {

    IdentityHashMap<Integer, String> ihmap1 = new IdentityHashMap<Integer, String>();
    IdentityHashMap<Integer, String> ihmap2 = new IdentityHashMap<Integer, String>();

    // populate the ihmap1
    ihmap1.put(1, "from");
    ihmap1.put(2, "java2s.com");
    ihmap1.put(3, "tutorial");

    System.out.println("Value of ihmap1 before: " + ihmap1);
    System.out.println("Value of ihmap2 before: " + ihmap2);

    // put all values from ihmap1 to ihmap2
    ihmap2.putAll(ihmap1);

    System.out.println("Value of ihmap2 after: " + ihmap2);
}

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From source file:com.google.gwt.emultest.java.util.IdentityHashMapTest.java

public void testIsEmpty() {
    IdentityHashMap srcMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(srcMap);

    IdentityHashMap dstMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(dstMap);

    dstMap.putAll(srcMap);
    assertTrue(dstMap.isEmpty());/*from w  ww  .j  a va2 s  .c om*/

    dstMap.put(KEY_KEY, VALUE_VAL);
    assertFalse(dstMap.isEmpty());

    dstMap.remove(KEY_KEY);
    assertTrue(dstMap.isEmpty());
    assertEquals(dstMap.size(), 0);
}

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From source file:com.google.gwt.emultest.java.util.IdentityHashMapTest.java

/**
 * Test method for 'java.util.IdentityHashMap.putAll(Map)'.
 *//*w  ww  .  j  a  v a2s  . c  om*/
public void testPutAll() {
    IdentityHashMap srcMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(srcMap);

    srcMap.put(KEY_1, VALUE_1);
    srcMap.put(KEY_2, VALUE_2);
    srcMap.put(KEY_3, VALUE_3);

    // Make sure that the data is copied correctly
    IdentityHashMap dstMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(dstMap);

    dstMap.putAll(srcMap);
    assertEquals(srcMap.size(), dstMap.size());
    assertTrue(dstMap.containsKey(KEY_1));
    assertTrue(dstMap.containsValue(VALUE_1));
    assertFalse(dstMap.containsKey(KEY_1.toUpperCase(Locale.ROOT)));
    assertFalse(dstMap.containsValue(VALUE_1.toUpperCase(Locale.ROOT)));

    assertTrue(dstMap.containsKey(KEY_2));
    assertTrue(dstMap.containsValue(VALUE_2));
    assertFalse(dstMap.containsKey(KEY_2.toUpperCase(Locale.ROOT)));
    assertFalse(dstMap.containsValue(VALUE_2.toUpperCase(Locale.ROOT)));

    assertTrue(dstMap.containsKey(KEY_3));
    assertTrue(dstMap.containsValue(VALUE_3));
    assertFalse(dstMap.containsKey(KEY_3.toUpperCase(Locale.ROOT)));
    assertFalse(dstMap.containsValue(VALUE_3.toUpperCase(Locale.ROOT)));

    // Check that an empty map does not blow away the contents of the
    // destination map
    IdentityHashMap emptyMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(emptyMap);
    dstMap.putAll(emptyMap);
    assertTrue(dstMap.size() == srcMap.size());

    // Check that put all overwrite any existing mapping in the destination map
    srcMap.put(KEY_1, VALUE_2);
    srcMap.put(KEY_2, VALUE_3);
    srcMap.put(KEY_3, VALUE_1);

    dstMap.putAll(srcMap);
    assertEquals(dstMap.size(), srcMap.size());
    assertEquals(dstMap.get(KEY_1), VALUE_2);
    assertEquals(dstMap.get(KEY_2), VALUE_3);
    assertEquals(dstMap.get(KEY_3), VALUE_1);

    // Check that a putAll does adds data but does not remove it

    srcMap.put(KEY_4, VALUE_4);
    dstMap.putAll(srcMap);
    assertEquals(dstMap.size(), srcMap.size());
    assertTrue(dstMap.containsKey(KEY_4));
    assertTrue(dstMap.containsValue(VALUE_4));
    assertEquals(dstMap.get(KEY_1), VALUE_2);
    assertEquals(dstMap.get(KEY_2), VALUE_3);
    assertEquals(dstMap.get(KEY_3), VALUE_1);
    assertEquals(dstMap.get(KEY_4), VALUE_4);

    dstMap.putAll(dstMap);
}

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From source file:com.google.gwt.emultest.java.util.IdentityHashMapTest.java

/**
 * Test method for 'java.util.IdentityHashMap.size()'.
 */// w  w w  .  j a v  a2s  . c  o m
public void testSize() {
    IdentityHashMap hashMap = new IdentityHashMap();
    checkEmptyHashMapAssumptions(hashMap);

    // Test size behavior on put
    assertEquals(hashMap.size(), SIZE_ZERO);
    hashMap.put(KEY_1, VALUE_1);
    assertEquals(hashMap.size(), SIZE_ONE);
    hashMap.put(KEY_2, VALUE_2);
    assertEquals(hashMap.size(), SIZE_TWO);
    hashMap.put(KEY_3, VALUE_3);
    assertEquals(hashMap.size(), SIZE_THREE);

    // Test size behavior on remove
    hashMap.remove(KEY_1);
    assertEquals(hashMap.size(), SIZE_TWO);
    hashMap.remove(KEY_2);
    assertEquals(hashMap.size(), SIZE_ONE);
    hashMap.remove(KEY_3);
    assertEquals(hashMap.size(), SIZE_ZERO);

    // Test size behavior on putAll
    hashMap.put(KEY_1, VALUE_1);
    hashMap.put(KEY_2, VALUE_2);
    hashMap.put(KEY_3, VALUE_3);
    IdentityHashMap srcMap = new IdentityHashMap(hashMap);
    hashMap.putAll(srcMap);
    assertEquals(hashMap.size(), SIZE_THREE);

    // Test size behavior on clear
    hashMap.clear();
    assertEquals(hashMap.size(), SIZE_ZERO);
}

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