为什么在参数化构造函数中出现此错误？

Question

alright , heres the code :

public class MyClass {

long var;
public void MyClass(long param)
{
var=param; //st1
}

public static void main(string args[])
{
MyClass a,b;
a=new MyClass(); //st2
b=new MyClass(5); //st3
}

}

why error occurs at st3 instead of line st2 ?

Answer 1

This:

public void MyClass(long param)

declares a method called MyClass , whereas I suspect you wanted a constructor. Remove the return type:

public MyClass(long param)

At that point I suspect you'll get the behaviour you expect.

Personally I think it's a design flaw that Java allows you to declare a method with the same name as the containing type, but that's a different matter.

Also note that

main(string args[])

should be

main(String args[])

or more conventionally:

main(String[] args)