What does nextInt mean in JAVA?

In Java, `nextInt` is one of the methods of the Scanner class. It is used to read the next integer value from user input. Specifically, the `nextInt` method will read the next integer from standard input and return it as a value.

Here is an example usage of the `nextInt` method:

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        System.out.print("请输入一个整数：");
        int num = scanner.nextInt();
        
        System.out.println("您输入的整数是：" + num);
    }
}

In the code above, we have instantiated a Scanner object to accept user input. We then use the `nextInt` method to read an integer from the user’s input and store it in the variable `num`. Finally, we print out the integer entered by the user.

It is important to note that if the user inputs something that is not a valid integer, the `nextInt` method will throw an InputMismatchException. Therefore, when using the `nextInt` method, it is necessary to handle potential exceptions.