Java 后台 判断是否为数字

package com.mzb.chzy.util;public class CommonUtils {/** * 判断是否为数字 * @param str * @return */public static boolean isNumeric(String str) {for (int i = str.length(); --i >= 0;) {if (!Character.isDigit(str.charAt(i))) {return false;}}return true;}public static void main(String[] args) {String str1 = "abc";System.out.println(CommonUtils.isNumeric(str1));String str2 = "123";System.out.println(CommonUtils.isNumeric(str2));}}

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