weixin_45430069的博客

1.使用匿名内部类public static HashMap<String, Integer> map = new HashMap<String,Integer>(){{put(“a”,1);put(“b”,2);put(“c”,3);put(“d”,4);}};即使加了final修饰符，用此方法创建的map也可以被修改2.使用静态代码块：public static Map<String, Integer> map;static {Map<

@RequestMapping("/queryPic")@ResponseBodypublic void queryPic(HttpServletResponse response) { File file = new File("D:\\test.png"); try { FileInputStream inputStream = new FileInputStream(file); byte[] data = new byte[(int) file.l

public class Demo_Sort { public static void main(String[] args) { //执行冒泡排序 bubbleSort(new int[]{123, 2, 1, 123, 132, 89, 380, 18, 2154, 42}); System.out.println(); //...