java中length与length()

length是对数组而言的，指的是数组的长度。

length()是对字符串而言的，指的是字符串所包含的字符个数。

public class LengthDemo {

	public static void main(String args[]) {

		String str = "Today is Monday";
		System.out.println(str.length());

		String[] str2 = {"abc","good","alas","ok"};
		System.out.println(str2.length);

		int[] a = new int[5];
		System.out.println(a.length);

	}
}

　　

结果：

15
4
5