public class CheckString {

public static boolean checkChar(char ch) {

if ((ch + "").getBytes().length == 1) {

return true;

} else {

return false;

}

}

public static String checkString(String str) {

String res = "";

if (str != null) {

for (int i = 0; i < str.length(); i++) {

if (!checkChar(str.charAt(i))) {

res = "中文";

break;

} else {

res = "英文";

}

}

}

return res;

}

public static void main(String[] args) {

String str = "RKJLKJDLKJLSKJLKJ小米手机";

System.out.println("使用长度判断:");

System.out.println(checkString(str));

}

}