java遍历数组与集合

    public static  void showArray(T[] t){
        for (int i = 0; i < t.length; i++) {
            System.out.println(t[i]);
        }
    }

    public static  void showArray2(T[] t){
        System.out.println(Arrays.toString(t));
    }

    public static  void showArray3(T[] t) {
        for (T item : t) {
            System.out.println(item);
        }
    }

    public static  void showArray4(T[] t) {
        int i=0;
        while (i
            System.out.println(t[i++]);
        }
    }

    public static  void showArray5(T[] t) {
        System.out.println(Arrays.asList(t));
    }

    public static void showList(List list){
        System.out.println(list);
    }

    public static void showList2(List list){
        for (int i = 0; i 
            System.out.println(list.get(i));
        }
    }

    public static void showList3(List list){
        final Iterator iterator = list.iterator();
        while (iterator.hasNext()){
            System.out.println(iterator.next());
        }
    }

    public static void showList4(List list){
        list.forEach((item)-> System.out.println(item));
    }

    public static void show1(Map map){
        System.out.println("show1---------------->");
        final Set> entrySet = map.entrySet();
        final Iterator> iterator = entrySet.iterator();
        while (iterator.hasNext()){
            final Map.Entry next = iterator.next();
            System.out.println("name:"+next.getKey()+",value:"+next.getValue());
        }
    }

    public static void show2(Map map){
        System.out.println("show2---------------->");
        final Set set = map.keySet();
        final Iterator iterator = set.iterator();
        while (iterator.hasNext()){
            String key= (String) iterator.next();
            System.out.println("name:"+key+",value:"+map.get(key));
        }
    }

    public static void show3(Map map){
        System.out.println("show3---------------->");
        map.forEach((k,v)->{
            System.out.println("key:"+k+",value:"+v);
        });
    }