一篇文章让你学会Java的输入与输出

public class Inputoutput {
    public static void main(String[] args){
        System.out.println("hello,java!");
        int a=9;
        System.out.println("output:"+a);
    }
}

public class Inputoutput {
    public static void main(String[] args){
        String a="wniuniu";
        String b="brilliantgby";
        System.out.printf(a);
        System.out.printf(b);
        System.out.printf("\n");
        System.out.printf("OvO");
        //int b=64;
        //System.out.printf(b);
    }
}

public class Inputoutput {
    public static void main(String[] args){
        char c='我';//没错，在Java中char有两字节，所以可以存中文
        int a=2187;
        byte b=127;
        System.out.print(c);
        System.out.print('\n');
        System.out.print(a);
        System.out.print("output:"+b);
    }
}

import java.util.Scanner;

Scanner input = new Scanner(System.in);

input.close();

<变量> = input.next变量类型名();

import java.util.Scanner;
public class Inputoutput {
    public static void main(String[] args){
        Scanner input=new Scanner(System.in);
        int a;
        byte b;
        float f;
        System.out.println("int input:");
        a=input.nextInt();
        System.out.println("output:"+a);

        System.out.println("byte input:");
        b=input.nextByte();
        System.out.println("output:"+b);

        System.out.println("float input:");
        f=input.nextFloat();
        System.out.println("output:"+f);

        input.close();
    }
}

<变量> = input.next();

<变量> = scanner.nextLine();

<变量>= input.next().charAt(0);

import java.util.Scanner;
public class Inputoutput {
    public static void main(String[] args){
        Scanner input=new Scanner(System.in);
        char c;
        System.out.println("char input:");
        c=input.next().charAt(0);
        System.out.println("output:"+c);
        input.close();
    }
}

import java.io.IOException;

import java.io.IOException;
public static void main(String[] args) throws IOException {
    char c;
    System.out.print("char input:");
    c = (char) System.in.read();
    System.out.println("Receive char:" + c);
}