Integer Number too large in java int for the value 08 ，但是当我只传递 8 或 11,12,13 时就没问题了

Question

Employee("Helen",16000,1965,08,03)，编译器抛出整数对于值太大的错误：08，但编译器对值 11 或 8 没有问题。

      import java.util.*;
      class Employee{
          private String name;
          private double salary;
          private Date hireDay;

              public Employee(String n, double s,int year, int month, int day){
                  name = n;
                  salary = s;
                  GregorianCalendar calendar = new GregorianCalendar(year,month-1,day);
                  hireDay = calendar.getTime();
              }
              public String getName(){
                  return name; 
              }   
              public double getSalary(){
                  return salary;
              }   
              public Date getHireDay(){
                  return hireDay; 
              }   

              public void raiseSalary(double byPercent){
                  double raise = salary * byPercent / 100;
                  salary += raise;

              }

      }

      public class EmployeeTest{
          public static void main(String[] args){

         Employee[] staff = new Employee[3];
          staff[0] = new Employee("Jack",15000,1992,03,07);
          staff[1] = new Employee("James",18000,1987,05,02);
    >>    staff[2] = new Employee("Helen",16000,1965,08,03);

// 这是 problem.When 我传递 08 当我传递 08 或它找到的某个两位数时它抛出错误 }

Output :

    [shadow@localhost java]$ javac EmployeeTest.java 
    EmployeeTest.java:37: error: integer number too large: 08
        staff[2] = new Employee("Helen",16000,1965,08,03);
                                                   ^
    1 error
    [shadow@localhost java]$

Answer 1

这是因为，在 Java 中，以 0 开头的数字（如您的 08）被视为八进制（基数 8）。而且八进制没有8。

（根据定义，八进制只使用数字 0-7）

作为实验，您可以尝试 07 或 011 并查看它们是否有效，或者尝试 08 或 09 并查看它们是否无效.

Integer Number too large in java int for the value 08 ，但是当我只传递 8 或 11,12,13 时就没问题了

Integer Number too large in java int for the value 08 , but when I pass just 8 or 11,12,13 it is just fine

java

int