java 各类型初始化汇总

int[] intArr = new int[]{1,2,3,4,5,9};

String[] strArr = {"张三","李四","王二麻"};

int[] price = new int[4];
price[0] = 99;
price[1] = 101;
......

List<String> jdks = Arrays.asList("JDK6", "JDK8", "JDK10");

List<String> names = new ArrayList<>() {{
    add("Tom");
    add("Sally");
    add("John");
}};

List<String> colors = Stream.of("blue", "red", "yellow").collect(toList());

List<String> cups = List.of("A", "B", "C");

List<String> apples = Collections.nCopies(3, "apple");

HashMap<String, String > myMap  = new HashMap<String, String>(){{  
      put("a","b");  
      put("b","b");       
}};

Map.of("Hello", 1, "World", 2);//不可变集合

Map<String, Integer> myMap = ImmutableMap.of("a", 1, "b", 2, "c", 3);