如何在创建单个对象时执行多个构造函数 [英] How to execute multiple constructor, when creating single object

问题描述

我想在创建单个对象时执行多个构造函数。例如，我有一个类定义，像这样 -

I want to execute multiple constructor, while creating a single object. For example, I have a class definition like this-

public class Prg
{
    public Prg()
    {
        System.out.println("In default constructor");
    }
    public Prg(int a)
    {
        System.out.println("In single parameter constructor");
    }
    public Prg(int b, int c)
    {
        System.out.println("In multiple parameter constructor");
    }
}

我试图通过以下代码实现它 -

And I am trying to achieve it by the following code -

public class Prg
{
    public Prg()
    {
        System.out.println("In default constructor");
    }
    public Prg(int a)
    {
        Prg();
        System.out.println("In single parameter constructor");
    }
    public Prg(int b, int c)
    {
        Prg(b);
        System.out.println("In multiple parameter constructor");
    }
    public static void main(String s[])
    {
        Prg obj = new Prg(10, 20);
    }
}

但在这种情况下， / p>

But in this case it is generating errors like -

Prg.java:11: error: cannot find symbol
            Prg();
            ^
  symbol:   method Prg()
  location: class Prg
Prg.java:16: error: cannot find symbol
            Prg(b);
            ^
  symbol:   method Prg(int)
  location: class Prg
2 errors

感谢

推荐答案

使用 this c>而不是 Prg（）在您的构造函数

这篇关于如何在创建单个对象时执行多个构造函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！