Object of class having toString() method

[Jyoti Vaskar]

If an object of a class having toString() method, is printed, It prints String value returned by method??
How this happen??

Is object value is string, returned by tostring() method in the class??

class A
{
public String toString()
	{
		return "This is A tostring";
	}
}

class ToString
{
	public static void main(String[] args) 
	{
		A a=new A();
		System.out.println(a+","+a.toString());
	}
}

can anybody please explain?

[Nitish Bangera]

What wrong in that now??? You are overriding the toString method of the method in your class and then calling your method toString??? What was the problem here??

[Jyoti Vaskar]

Nitish Bangera wrote:What wrong in that now??? You are overriding the toString method of the method in your class and then calling your method toString??? What was the problem here??

Yes I override the method in my class.

But I am confused for this below,
when I try to print the value of the object of class A i.e. System.out.println(a);(A a=new A())
this prints string "This is A tostring" which is returned by toSting() method.

Now is it the object value??

[Sebastian Janisch]

The toString() function is a way of -well- turning your Object into a string somehow. This can either be an explanation or whatever you feel makes sense.

The default implementation by the Object class throws back the instances' reference code.

[Rusty Shackleford]

System.out.println(a) and System.out.println(a.toString()) are equivalent. They both call toString which returns a string, which println prints. All objects in Java have a toString method because it is part of Object.

[Deepak Borania]

By overriding the toString(), you define what should be returned when you want to use you object as a string. This string can be anything you want. It may just return value of fields as a string, or anything else..

[Maneesh Godbole]

From the PrintStream source code:

public void println(Object x) {
        String s = String.valueOf(x);
        synchronized (this) {
            print(s);
            newLine();
        }
    }

and from the String source code

public static String valueOf(Object obj) {
	return (obj == null) ? "null" : obj.toString();
    }