求助大佬，java有没有别的方法提取string里的空格啊？orz 代码如下：

import java.util.Scanner;

public class P5015 {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		String str = scanner.nextLine();
		int length = str.length();
		for (int i = 0; i < str.length(); i++) {
			if (str.charAt(i) == 32) {
				length--;
			}
		}
		System.out.println(length);
		scanner.close();
	}
}