Java掃描儀和int不顯示年齡

Question

如何減去出生年份和當前年份以顯示年齡？

Scanner user_input = new Scanner(System.in); 
    String birth_year; 

    System.out.print("Enter your the year you were born: "); 
    birth_year = user_input.next(); 

    int age, current_year = 2016; 
    age = current_year - birth_year; 

    System.out.println("Your age is "+age); 

Answer 1

使用user_input.nextInt()閱讀整數值，你不能字符串。減去和int：

Scanner user_input = new Scanner(System.in); 
int birth_year; 

System.out.print("Enter your the year you were born: "); 
birth_year = user_input.nextInt(); 

int age, current_year = 2016; 
age = current_year - birth_year; 

System.out.println("Your age is "+age) 

Answer 2

您可以使用這樣的事情也

LocalDate birthdate = LocalDate.of(YEAR, MONTH, DAY); 
    LocalDate now = LocalDate.now(); 
    int age = Period.between(birthdate, now).getYears();