Java uses the nextLine() function of the Scanner class to obtain a line of string input from the console

Java uses the nextLine() function of the Scanner class to obtain a line of string input from the console

In Java programming, we often need to obtain user input from the console. The Scanner class is a commonly used tool class in Java that can easily read user input. Among them, the nextLine() function can be used to read a line of string input from the console. This article will introduce how to use the nextLine() function of the Scanner class to obtain a line of string input from the console, and give corresponding code examples.

First, we need to introduce the java.util package into the code to use the Scanner class. The specific introduction method is as follows:

import java.util.Scanner;

Next, we create a Scanner object to obtain the content input by the console. An example is as follows:

Scanner scanner = new Scanner(System.in);

Then, we can call the nextLine() function of the Scanner object to read a line of string input by the console. An example is as follows:

String input = scanner.nextLine();

Here, we use a string variable input to receive the content entered by the console.

Finally, we can process the input accordingly, such as printing output, judging whether the input meets the requirements, etc. The example is as follows:

System.out.println("您输入的字符串是：" + input);

The complete code example is as follows:

import java.util.Scanner;

public class ConsoleInputExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一行字符串：");
        String input = scanner.nextLine();
        System.out.println("您输入的字符串是：" + input);
    }
}

In the above code example, the prompt message "Please enter a line of string:" is first output, and then the nextLine() function is called. Get a line of string input by the user, and finally print out the input string.

Through the above steps, we can use the nextLine() function of Java's Scanner class to easily obtain a line of string input from the console, and then perform corresponding processing and operations.

To summarize, this article introduces how to use the nextLine() function of Java's Scanner class to obtain a line of string input from the console. Through the demonstration of code examples, we can clearly understand the entire process. I hope this article will be helpful to readers in handling console input in Java programming.

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