Java判断是数字还是字符串
方法一：利用正则表达式
public class Testone {public static void main(String[] args){String str="123456";boolean result=str.matches("[0-9]+");if (result == true) {System.out.println("该字符串是纯数字");}else{System.out.println("该字符串不是纯数字");}}} |
方法二：利用Pattern.
import java.util.regex.Matcher;import java.util.regex.Pattern;public class Testone {public static void main(String[] args){String str="123456";Pattern pattern = Pattern.compile("[0-9]{1,}");Matcher matcher = pattern.matcher((CharSequence)str);boolean result=matcher.matches();System.out.println("该字符串是纯数字");}else{System.out.println("该字符串不是纯数字");}}}