Can anyone explain it,esp the last two outputs

Question

public class Test{
char cvalue;
float fvalue;
Test(char cvalue,float fvalue ){
System.out.println(cvalue+" "+this.cvalue ) ;
System.out.println(fvalue +" "+this.fvalue);
this.cvalue =cvalue;
this.fvalue =fvalue ;

}

public static void main(String[] args) {
Test ref=new Test('a',2.5f);
System.out.println(ref.cvalue+" "+ref.fvalue );
Test ref1= new Test('d',9.3f);
System.out.println(ref1.cvalue);
System.out.println(ref1.fvalue);

}
}

Answer 1

The class Test has two attributes/variables:
char cvalue
float fvalue

The constructor expects two variables: char and float
cvalue means the variable from outside, this.cvalue means the attribute from this object
Same for fvalue

Inside the constructor you print first cvalue + this.cvalue and fvalue and this.fvalue
At this time the two attributes have default values
char: is not printable
float: 0.0

this.cvalue gets value from cvalue
same for fvalue

In your main method
Create an object ref
First the constructor is called: You see the printed stuff from the constructor.
Then it prints the atttibutes of ref.
print statement from constructor:
a + default value (which you can't see)
2.5 0.0
print statement from main method:
a 2.5

Same for ref1:
from constructor:
d
9.3 0.0
from main:
d
9.3