java-length 、length()、size()的区别

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