leetcode:Isomorphic Strings (java)

记录一道hashtable的题，用两次互相的字符(s[i])到字符(t[i])映射记录，然后按照映射还原比较就可以判断是否相同，开始以为只有字母，后来发现是ascii码表长度的alphabet才可以~

public static boolean isIsomorphic(String s, String t) {
        char[] alph1 = new char[128];
        char[] alph2 = new char[128];
        for(int i=0;i<s.length();i++){
            alph1[s.charAt(i)] = t.charAt(i);
            alph2[t.charAt(i)] = s.charAt(i);
        }
        StringBuffer sb1 = new StringBuffer();
        StringBuffer sb2 = new StringBuffer();
        
        for(int i=0;i<s.length();i++){
            sb1.append(alph1[s.charAt(i)]);
            sb2.append(alph2[t.charAt(i)]);
        }
        
        System.out.println(sb1);

        System.out.println(sb2);
        
        if(sb1.toString().equals(t) && sb2.toString().equals(s)){
        	return true;
        }else{
        	return false;
        }
    }
	public static void main(String[] args) {
		String s = "bb";
		String t = "aa";
		System.out.println(isIsomorphic(s,t));
	}