java 正则表达式 至少含有一个数字

以下是使用Java正则表达式判断字符串是否至少含有一个数字的示例代码：

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] args) {
        String regex = ".*\\d.*"; // 包含至少一个数字的正则表达式

        String input1 = "abc123";
        String input2 = "abcdef";

        Pattern pattern = Pattern.compile(regex);

        Matcher matcher1 = pattern.matcher(input1);
        boolean containsNumber1 = matcher1.matches();
        System.out.println("Input1 contains at least one number: " + containsNumber1); // 输出：true

        Matcher matcher2 = pattern.matcher(input2);
        boolean containsNumber2 = matcher2.matches();
        System.out.println("Input2 contains at least one number: " + containsNumber2); // 输出：false
    }
}