遍历List集合的三种方式
0. 首先准备测试数据
1 List<String> list = new ArrayList<String>(); 2 list.add("Java"); 3 list.add("C++"); 4 list.add("Python");
1. 增强for循环
1 for (String attribute : list) { 2 System.out.println(attribute); 3 }
2. for循环
for (int i = 0; i < list.size(); i++) { System.out.println(list.get(i)); }
3. 集合类通用遍历方式：迭代器
1 Iterator<String> it = list.iterator(); 2 while(it.hasNext()) { 3 System.out.println(it.next()); 4 }