解释一下import java.util.Scanner;
时间: 2023-05-22 17:02:32 浏览: 93
import java.util.Scanner;是Java中的一个用于读取用户输入的类库,可以通过创建Scanner对象来实现对用户输入数据的读取。该类库常被用于读取从键盘输入的内容。其基本用法如下:
1.创建Scanner对象:
Scanner scanner = new Scanner(System.in);
2.读取用户输入数据:
int num = scanner.nextInt();
3.对读取的数据进行处理:
// do something with num
注意:在使用Scanner之前,需要先导入java.util.Scanner类库,一般应该将其放在Java程序的最上面。
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import java.util.scanner
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import java.util.Scanner;
As an AI language model, I cannot perform input/output operations or run Java code. However, here is an example of how the Scanner class can be used in Java to read user input from the console:
```
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter your name: ");
String name = scanner.nextLine();
System.out.println("Hello, " + name + "!");
scanner.close();
}
}
```
In this example, we create a Scanner object to read input from the console using `System.in`. We then prompt the user to enter their name and read their input using the `nextLine()` method of the Scanner class. Finally, we print out a greeting using the user's name. Note that we close the Scanner object at the end to prevent resource leaks.