如何修复Java数组首先在for循环内跳过第一个用户输入

Question

我想在循环内使用用户输入来填充多维数组，但是它会跳过第一个输入并继续进行下一个输入。这是我的代码

import java.util.Scanner;

public class MyClass {
public static void main(String args[]) {
    Scanner input = new Scanner(System.in);
    System.out.print("number of batches: ");
    int a = input.nextInt();
    System.out.print("number of students: ");
    int b = input.nextInt();
    String[][] list = new String[a][b];
    String name;
    for (int j = 0; j < a; j++) {
        for (int i = 0; i < b; i++) {
            System.out.print("enter a student: ");
            list[j][i] = input.nextLine();
        }

    }
}
}

结果如下：

number of batches: 2

number of students: 3

enter a student: enter a student:

//第一个输入被跳过