Java 扫描仪，包含数字

Question

String[] invalidChars = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
         Scanner sc = new Scanner(System.in);
         try {
             String country = sc.next();
             String state = sc.next();
             String city = sc.next();

             if(country.contains(invalidChars) || state.contains(invalidChars) || city.contains(invalidChars)) {

             }
         }
         catch(Exception e){}

我如何告诉 if 语句检查字符串是否包含任何数字？我尝试了数组购买，但收到错误消息“String[] 无法转换为 CharSequence”？请问有什么想法吗？

Answer 1

您想使用正则表达式。

yourString.matches(".*\\d.*");  // returns true if the string contains a number