java-length 、length()、size()的区别
- public static void main(String[] args) {
- //length 、length()、size()的区别
- //length属性 针对数组长度
- String a[]={"zhangsan","lisi","wangwu","zhaoliu"};
- System.out.println(a.length);
- //length()方法 针对字符串
- String b="zhangsanlisiwangwuzhaoliu";
- System.out.println(b.length());
- //size()方法针对泛型集合
- List<String> person=new ArrayList();
- person.add("zhangsan");
- System.out.println(person.size());
-
- }
运行结果：
4
25
1
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