package hello;

import java.util.Scanner;

public class Hello {

	private static Scanner in;

	public static void main(String[] args) {
		in = new Scanner(System.in);
		int price=0;
		int amount=0;
		System.out.print("请输入票面");
		amount=in.nextInt();
		System.out.print("请输入金额");	
		price =in.nextInt();
		System.out.println(amount+"-"+price+"="+(amount-price));
	}
}



JAVA的输入输出语句:

1.输出指令
System.out.println(“Hello JAVA"  );

注意:
①System首字母大写,
②Println和print区别:println输出后换行;print只输出不换行(建议用Println)

2.输入指令
Scanner in =new Scanner(System.in);

System.out.println(in.nextLine());
①运算符+可以用来将两个字符串加起来
适当增加一些()也可以进行算术运算