Java中如何定义Map常量、List常量呢？

一、在Java中定义Map常量

1、使用静态代码块：

public static final Map map = new HashMap();
static {
map.put("key1", "value1");
map.put("key2", "value2");
}

public static final Map map = new HashMap<>() {
{
put("key1", "value1");
put("key2", "value2");
put("key3", null);
}
};

public static final List list = Arrays.asList("88","99","100");