How to enter in java

How to input in java

You can use the Scanner class to input in java. The Scanner class is located in java.util. Scanner package, so add this package in front of the program.

The code is as follows: (Recommended tutorial: java tutorial)

import java.util.Scanner;
public class Input {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);//定义scanner，等待输入
		System.out.println("请输入你的姓名:");
		String name = in.nextLine();//字符类型的输入方式
		System.out.println(name);
		System.out.println("请输入你的年龄：");
		int age = in.nextInt();//整数类型的输入方式
		System.out.println(age);
		System.out.println("请输入你的身高：");
		double height = in.nextDouble();//小数类型的输入方式
		System.out.println(height);
	}
}

whereScanner in = new Scanner(System.in);This sentence is the key. The meaning of this sentence is: create a Scanner through new Scanner (System.in), the console will wait for input until hit the Enter key, and pass the entered content to the Scanner as the scanning object .

Then if you want to get the input content, you need to call the Scanner's nextLine() method, so String name = in.nextLine(), int age = in.nextInt(), double height = These three sentences in.nextDouble() are used to obtain the input content.

As shown in the code, the Scanner class is still easy to use. Whether it is a string, an integer or a floating point type, you only need to make a few small changes to realize the input function.

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