Hi

I have a problem about default value of data member!

+++++++ cut here++++++
class CComputer
{
  private double cpu=3.0;
  private double memory=1.0;

  public void set(double c)
  {
       if(c<0)
           System.out.println("Input cpu error, cpu is default value");
       else
       this.cpu=c;
  }
  public void set_memory(double m)
  {
       if(m<0)
           System.out.println("Input memory error, memory is default
value");
       else
       {
       memory=m;
           show_memory();
       }
  }

  public void set(double c,double m)
  {
   set(c);
   set_memory(m);
  }
  void show_cpu()
  {
    System.out.println("cpu="+this.cpu);
  }
  void show_memory()
  {
    System.out.println("memory="+this.memory);
  }
  void show_all()
  {
  this.show_cpu();
  this.show_memory();
  }
}
public class bbb
{
  public static void main(String args[])
  {
   CComputer c1=new CComputer();

   c1.set(-3.5,1.5);
   c1.show_all();
   c1.set(-3.5,-2.0);
   c1.show_all();
   c1.set(-3.5);
   c1.show_all();
  }
}
+++++++

The output of "c1.set(-3.5,-2.0);" shows memory=1.5.
The output of " c1.set(-3.5);" also shows memory=1.5;

Why?  I thought memory should be default value, i.e. 1.0.

Thank you in advance.

Mike