HashBiMapDemo.java 文件源码

/**
 * HashBiMap 修改数据
 * putAll
 * remove
 * replace
 */
@Test
public void testUpdateBiMapDate() {
    BiMap<String, String> biMap = HashBiMap.create();
    biMap.put("k1", "v1");
    biMap.put("k2", "v2");

    // putAll , 存入另一个Map的数据,此时如果value有重复的依然会抛异常
    biMap.putAll(ImmutableBiMap.of("k3", "v3", "k4", "v4", "k5", "v5", "k6", "v6"));
    System.out.println("biMap putAll after: " + biMap);

    System.out.println("\n-------------------------------------------\n");

    // remove , 移除指定key的元素,如果key不存在,则返回null
    String v2 = biMap.remove("k2");
    String valueNotExists = biMap.remove("keyNotExists");
    System.out.println("remove k2 then biMap= " + biMap + ", and remove the value= " + v2);
    System.out.println("valueNotExists=" + valueNotExists);

    System.out.println("\n-------------------------------------------\n");

    // 清空map里的数据
    biMap.clear();
    System.out.println("clean biMap=" + biMap);
}