class Buffer
{
private const int defaultBufferSize = 100;
public Buffer(int bufferSize)
{
buf = new int[bufferSize];
}
public Buffer():this(defaultBufferSize)
{
}
private int[] buf;
}我知道有继承,实现接口,泛型约束,不过这里面的:是干吗的??
public Buffer():this(defaultBufferSize)
{
private const int defaultBufferSize = 100;
public Buffer(int bufferSize)
{
buf = new int[bufferSize];
}
public Buffer():this(defaultBufferSize)
{
}
private int[] buf;
}我知道有继承,实现接口,泛型约束,不过这里面的:是干吗的??
public Buffer():this(defaultBufferSize)
========================================
相当于默认构造函数调用带参数的构造函数
public Buffer()
{ this.buffer(defaultBufferSize);
}
=======================
不是的,比较以下两种写法,相对而言,后者肯定更好维护class Demo
{
int x;
int y;
public Demo()
{
x = 0;
y = 0;
}
public Demo(int x)
{
this.x = x;
y = 0;
}
public Demo(int x, int y)
{
this.x = x;
this.y = y;
}
}class Demo
{
int x;
int y;
public Demo():this(0,0)
{
}
public Demo(int x):this(x,0)
{
}
public Demo(int x, int y)
{
this.x = x;
this.y = y;
}
}
==============================
构造函数是用来初始化对象的,不是明确调用的