Use java's Scanner.hasNextShort() function to determine whether the next input is a short integer

Using Java's Scanner class can easily perform input operations, and the hasNextShort() function in the Scanner class can determine whether the next input is a short integer. This article will introduce how to use the hasNextShort() function and code examples.

1. Introduction to Scanner class

The Scanner class is a convenient input class provided in Java, which can read standard input, file input, etc. It provides a series of nextXXX() methods for reading different types of input, such as next() for reading strings, nextInt() for reading integers, etc. The hasNextShort() method is used to determine whether the next input is a short integer.

2. How to use the hasNextShort() function

Before using the hasNextShort() function, we first need to create a Scanner object. There are many ways to create a Scanner object. For example, create a Scanner object from standard input. The code is as follows:

Scanner scanner = new Scanner(System.in);

After creating the Scanner object, we can use the hasNextShort() function to determine whether the next input is a short integer. The hasNextShort() function returns a boolean value. If the next input is a short integer, it returns true, otherwise it returns false.

3. Code Example

The following is a simple code example that demonstrates how to use the hasNextShort() function to determine whether the next input is a short integer.

import java.util.Scanner;

public class ShortIntegerScannerExample {
    public static void main(String[] args) {
        // 创建Scanner对象
        Scanner scanner = new Scanner(System.in);

        // 判断下一个输入是否为短整数
        if (scanner.hasNextShort()) {
            // 读取短整数
            short num = scanner.nextShort();
            System.out.println("输入的是短整数：" + num);
        } else {
            System.out.println("输入的不是短整数");
        }

        // 关闭Scanner对象
        scanner.close();
    }
}

The above code first creates a Scanner object scanner, and then uses the hasNextShort() function to determine whether the next input is a short integer. If it is a short integer, use the nextShort() function to read the input short integer and output relevant information. If it is not a short integer, the corresponding prompt is output.

4. Summary

This article introduces how to use the hasNextShort() function of Java's Scanner class to determine whether the next input is a short integer, and gives corresponding code examples. Using the hasNextShort() function can easily determine whether the input is a short integer, thereby avoiding possible exceptions during type conversion. Hope this article helps you!

The above is the detailed content of Use java's Scanner.hasNextShort() function to determine whether the next input is a short integer. For more information, please follow other related articles on the PHP Chinese website!