[leedcode 242] Valid Anagram

Given two strings s and t, write a function to determine if t is an anagram of s.

For example,
s = "anagram", t = "nagaram", return true.
s = "rat", t = "car", return false.

Note:
You may assume the string contains only lowercase alphabets.

public class Solution {
    public boolean isAnagram(String s, String t) {
        //因为是26个字母,因此可以借助size为26的数组进行计算,下标代表字母,值为个数
        //注意遍历第二个string时,返回false的技巧!!
        int c[]=new int[26];
        int lens=s.length();
        int lent=t.length();
        if(lens!=lent) return false;
        for(int i=0;i<lens;i++){
            c[s.charAt(i)-‘a‘]++;
        }
        for(int j=0;j<lent;j++){
            if(c[t.charAt(j)-‘a‘]==0)return false;
            c[t.charAt(j)-‘a‘]--;
        }
        return true;
    }
}
时间: 2024-12-23 12:43:06

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