java input（）

In Java, `input()` is not a built-in function or method. However, there are several ways to receive input from the user in Java.

One common way is to use the `Scanner` class, which is part of the `java.util` package. Here's an example of how to use `Scanner` to receive input from the user:

import java.util.Scanner;

public class Example {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter a number: ");
    int num = scanner.nextInt();
    System.out.println("You entered: " + num);
    scanner.close();
  }
}

In this example, we create a `Scanner` object and use it to read input from the console using `nextInt()` method. We then print the input back to the console.

There are also other ways to receive input in Java, such as using `BufferedReader` or `JOptionPane`.