leetcode 205. Isomorphic Strings
- Isomorphic Strings:题目链接
方法1：map
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| import java.util.HashMap;
import java.util.Map;
public class Solution1 {
// 时间复杂度O(N)
public boolean isIsomorphic(String s, String t) {
Map<Character, Character> map = new HashMap<>();
if (s.length() != t.length()) {
return false;
}
for (int i = 0; i < s.length(); ++i) {
char chs = s.charAt(i);
char cht = t.charAt(i);
if (map.containsKey(chs)) {
if (!map.get(chs).equals(cht)) {
return false;
}
} else {
if (map.containsValue(cht)){
return false;
}
map.put(chs, cht);
}
}
return true;
}
public static void main(String[] args) {
String s = "egg";
String t = "add";
System.out.println(new Solution1().isIsomorphic(s, t));
}
}
|
pS: 源代码链接
