检查字符串是否包含有效数字

public class Main {


  public static void main(String[] args) {/**来 自 时代Java公众号 - nowjava.com**/


    String[] str = new String[] { "10.20", "1234.56", "12.invalid","1.1.1" };


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


      if (str[i].indexOf(".") > 0) {


        try {

          Double.parseDouble(str[i]);

          System.out.println(str[i] + " is a valid decimal number");

        } catch (NumberFormatException nme) {

          System.out.println(str[i] + " is not a valid decimal number");

        }


      } else {

        try {
        /* from 
        N o w J a v a . c o m*/

          Integer.parseInt(str[i]);

          System.out.println(str[i] +