华为机试(1)字符串最后一个单词的长度

package java_huaweijishi;
import java.util.*;
/**
 * 题目:计算字符串最后一个单词的长度,单词以空格隔开。
 * @author hexiaoli
 * 思路:1)自己递归实现功能
 *     2)用java自带函数
 */
public class lastWordLength {
	public static int lastWordLength1(String str){
        //方法一:
        int totalLength = str.length();
        if(str == null || totalLength <= 0 || totalLength>5000){
            return 0;
        }
        int length = 0;
        int index = totalLength-1;
        while(index>=0 && str.charAt(index)!=' '){
            length++;
            index--;
        }
        return length;    
    }
	public static int lastWordLength2(String str) {
        //方法二:java自带
        String[] strs = str.split(" ");
        return strs[strs.length-1].length();
	}
	public static void main(String[] args) {
        Scanner scan = new  Scanner(System.in);
        while(scan.hasNext()){
           String str = scan.nextLine();
           System.out.println(lastWordLength1(str));
           System.out.println(lastWordLength2(str));          
	}
	}
}

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转载自blog.csdn.net/hxl0925/article/details/89328648