这个Java程序简单,充满意见的,所以你可以fast.however理解,为什么在构建员工[1],该计划先去声明:java的构造为了
this("Employee #" + nextId, s);
然后去对象初始化块,然后回到说法,怎么confusion.why不是第一次使用对象初始化块
import java.util.*;
public class ConstructorTest
{
public static void main(String[] args)
{
// fill the staff array with three Employee objects
Employee[] staff = new Employee[3];
staff[0] = new Employee("Harry", 40000);
staff[1] = new Employee(60000);
staff[2] = new Employee();
// print out information about all Employee objects
for (Employee e : staff)
System.out.println("name=" + e.getName()
+ ",id=" + e.getId()
+ ",salary=" + e.getSalary());
}
}
class Employee
{
// three overloaded constructors
public Employee(String n, double s)
{
name = n;
salary = s;
}
public Employee(double s)
{
// calls the Employee(String, double) constructor
this("Employee #" + nextId, s);
}
// the default constructor
public Employee()
{
// name initialized to ""--see below
// salary not explicitly set--initialized to 0
// id initialized in initialization block
}
public String getName()
{
return name;
}
public double getSalary()
{
return salary;
}
public int getId()
{
return id;
}
private static int nextId;
private int id;
private String name = ""; // instance field initialization
private double salary;
// static initialization block
static
{
Random generator = new Random();
// set nextId to a random number between 0 and 9999
nextId = generator.nextInt(10000);
}
// object initialization block
{
id = nextId;
nextId++;
}
}
什么问题? – MasterCassim
听起来就像你在问为什么'this'语句在实例初始化块之前执行。那是对的吗? –