Map

验证HashMap无序

public class MyMap {
    @Test
    public void test1(){
        Map map  = new HashMap();
        map.put(1, "no 1");
        map.put(3, "no 3");
        map.put(6, "no 6");
        map.put(4, "no 4");
        map.put(5, "no 5");
        for (Object e : map.entrySet()) {
            Map.Entry e1 = (Map.Entry) e;
            System.out.println(e1.getValue());
        }
    }
}
/* 输出结果
no 1
no 3
no 4
no 5
no 6
*/