balukasula

 Profile Answers by balukasula 

• Jul 20th, 2011

 

it returns null value

javagek

 Profile Answers by javagek 

• Aug 30th, 2011

 

The default implementation of toString method in Object class returns the fully qualified name of the object's class followed by an '@' sign and a reference id that points to the object. E.g.

Object objTemp1 = new Object();
System.out.println("OBJECT :" + objTemp1.toString());

would print something like OBJECT :java.lang.Object@19821f on the console.

Note, the value of id might change every time your run the program.

koti.tirumala

 Profile Answers by koti.tirumala Questions by koti.tirumala

• Jan 5th, 2012

 

toString() will do the object representation of data(Object) into String representation.

sampra

 Profile Answers by sampra 

• Mar 6th, 2012

 

toString() will do the object representation of data(Object) into String representation

Nikhil

• Feb 21st, 2013

 

If toString() method is not overriden, it will return

public String toString() {
return getClass().getName() + "@" + Integer.toHexString(hashCode());
}

This is Object version of this method.

sivapurammani

 Profile Answers by sivapurammani 

• Jul 10th, 2013

 

Default value is String representation of any Object.

Code
class Student {


 int rollNo;


 String name;


public Student(int rollNo, String name){


this.rollNo = rollNo;


this.name = name;


}


}


class StringEx {


       Student s1= new Student(1,"sandy");


       System.out.println(s1);


}


 

Output :: Student@1f231e

Here the output is Name of the Object class i.e Stundent and hashcode of that object i.e 1f231e ..... If you observe the above code, we are calling the s1 object in System.out.prinln ......But internally it calls the toString method which is present in Object class. So the above output given by Object class toString method.

If you want then you can override that function in Student class as given below

Code
class Student {


 int rollNo;


 String name;


public Student(int rollNo, String name){


this.rollNo = rollNo;


this.name = name;


}


public String toString(){


 return rollNo+ " " +name;


}


}


class StringEx {


       Student s1= new Student(1,"sandy");


       System.out.println(s1.toString());


}

Output :: 1 sandy


Please observe the code difference in above two programs then you can understand very easily.