题解 | #判断字符是否唯一#
判断字符是否唯一
https://www.nowcoder.com/practice/fb08c63e2c4f4f7dbf41086e46044211
public boolean isUnique (String str) {
// write code here
int len = str.length();
HashSet set = new HashSet(len);
for (int i = 0; i < len; i++) {
set.add(str.charAt(i));
}
if (len == set.size()) {
return true;
}else {
return false;
}
}
