小编cba*_*ss0的帖子

我一直得到一个nullPointerException,其余的代码将无法运行.我有两个班级设置.一个是SalesPerson另一个包含main方法.标记线42,这是nullPointerException发生的位置.

这是第42行

System.out.printf("%-20s %15.2f %14.2f %n", list[i].getFirstName()  + " " + list[i].getLastName(), list[i].getTotalSales(), list[i].getSalary());





public class SalesPerson {
    private String firstName;
    private String lastName;
    private double firstSales;
    private double secondSales;
    private double thirdSales;
    private double fourthSales;
    private double totalSales;
    private double salary;

    public SalesPerson(String lastName, String firstName, double firstSales,
            double secondSales, double thirdSales, double fourthSales,
            double totalSales, double salary) {

        this.lastName = lastName;
        this.firstName = firstName;
        this.firstSales = firstSales;
        this.secondSales = secondSales; …