Java中，Scanner只读取前两行，而忽略其余行

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String line1 = scanner.nextLine();
        String line2 = scanner.nextLine();
        System.out.println("第一行输入：" + line1);
        System.out.println("第二行输入：" + line2);
    }
}