public class Numeric { public static void main(String[] args) { String string = "-1234.15"; boolean numeric = true; numeric = string.matches("-?\\d+(\\.\\d+)?"); if(numeric) System.out.println(string + " is a number"); else System.out.println(string + " is not a number"); } }
java 使用正则判断是不是一个数字
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转载自www.cnblogs.com/sea-stream/p/9842972.html
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