慎用, 非静态内部类/ 匿名内部类包含了外围实例的引用, 如果拥有比 外部类更长的生命周期,有内存泄露隐患
public class Demo{ private static final Map<String, String> myMap; static { myMap = new HashMap<String, String>(); myMap.put("a", "b"); myMap.put("c", "d"); } }
HashMap<String, String > h = new HashMap<String, String>(){{ put("a","b"); }};
Map<String, Integer> left = ImmutableMap.of("a", 1, "b", 2, "c", 3); //或者 Map<String, String> test = ImmutableMap.<String, String>builder() .put("k1", "v1") .put("k2", "v2") ... .build();
JAVA构造MAP并初始化MAP介绍到这里,更多java学习请参考编程字典java教程 和问答部分,谢谢大家对编程字典的支持。
原文链接:https://blog.csdn.net/dujianxiong/article/details/54849079?ops_request_misc=&request_id=&biz_id=102&utm_term=java&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~sobaiduweb~default-3-54849079.nonecase&spm=1018.2226.3001.4450