java - java类的字符串表达式

Question

String sentence = "Bill has a cow 76786545 54324567 mary@lamb.com";

如何不使用数组检索 76786545 54324567？

我尝试了以下方法:

String[] num = sentence.split("\\s"); 
for (int x=0; x<num.length; x++) { 
   System.out.println(num[x]); 
}

Answer 1

您可以构造一个新的字符串并将所有非数字字符替换为空格:

newStr = newStr.replaceAll("\\D+", " ").trim();

\D 是匹配任何非数字字符的正则表达式:[^0-9]:

-> String sentence = "Bill has a cow 76786545 54324567 mary@lamb.com";
-> sentence.replaceAll("\\D+", " ").trim()
|  Expression value is: "76786545 54324567"