Java使用Scanner类进行文件的读取方式 java中scanner用法导入

import java.util.Scanner;
public class test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
 
		for (int i = 0; i <= 5; i++) {
			int temp = sc.nextInt(); //sc.nextInt()可以获取一个输入的数字
			System.out.println(temp);
		}
 
	}
}

File file = new File("test.txt");
Scanner sc = new Scanner(file);

            while(sc.hasNext()) {
				String temp = sc.nextLine();
				System.out.println(temp);
			}

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
 
public class test {
	public static void main(String[] args) {
 
		try {
			File file = new File("test.txt");
			// System.out.println(file.getAbsolutePath());
			Scanner sc = new Scanner(file);
			while (sc.hasNext()) {
				String temp = sc.nextLine();
				System.out.println(temp);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
 
	}
}

Scanner myscan = new Scanner(System.in);
//以int行为例；
int test = myscan.nextInt();

import java.util.Scanner;

import java.util.Scanner;
public class input {
    public static void main(String[] args){
        Scanner myscn = new Scanner(System.in);
        //steing型
        String name = myscn.next();
        //int型
        int age = myscn.nextInt();
        //double型
        double score = myscn.nextDouble();
        //char型
        char num = myscn.next().charAt(0);
    }
}