Java基本输入输出

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基本输入

 

基本输出

package com.ahabest.demo;

public class Test {

    public static void main(String[] args) {

        System.out.print("print\n");

        System.out.printf("printf\n");

        System.out.println("println");

    }

}

Scanner类

package com.ahabest.demo;

import java.util.Scanner;

//next以空格结束判断

public class ScannerTest {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        if(sc.hasNext()) {

            String st = sc.next();

            System.out.println(st);

        }

        sc.close();

    }

}

 

package com.ahabest.demo;

import java.util.Scanner;

//nextLine以回车结束判断

public class ScannerTest {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        if(sc.hasNextLine()) {

            String st = sc.nextLine();

            System.out.println(st);

        }

        sc.close();

    }

}