what is object in java

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Rasel Ahmed answered on November 17, 2021 Popularity 10/10 Helpfulness 1/10

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what is object in java

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It is a basic unit of Object-Oriented Programming and represents real life 
entities. A typical Java program creates many objects, which as you know,
interact by invoking methods. An object consists of : 

State: It is represented by attributes of an object. It also reflects the 
properties of an object.

Behavior: It is represented by methods of an object. It also reflects the 
response of an object with other objects.

Identity: It gives a unique name to an object and enables one object to 
interact with other objects. 

class Student
{ 
    int id;//data member (also instance variable) 
    String name; //data member (also instance variable) 
 
    public static void main(String args[])
    { 
        Student s1=new Student();//creating an object of Student 
        System.out.println(s1.id); 
        System.out.println(s1.name); 
     } 
}

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Source: www.geeksforgeeks.org

Tags: java object

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Contributed on Jun 18 2022

Rasel Ahmed

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classes and objects in java

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Remember from the Java Syntax chapter 
that a class should always start with an uppercase first letter, 
and that the name of the java file should match the class name.

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Source: Grepper

Tags: java

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Contributed on Aug 15 2022

ZR07

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java object

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ClassName obj = new ClassName(); //creating an object of ClassName class 
System.out.println(obj.field1); // calling field of the object (bad practice, make the fields private)
System.out.println(obj.field2);

obj.doSomething(); // calling method of the object

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Source: Grepper

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Contributed on Aug 05 2023

Innocent Iguana

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object class of java

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// Default behavior of toString() is to print class name, then
// @, then unsigned hexadecimal representation of the hash code
// of the object

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

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Contributed on May 07 2022

Green Team

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object class java

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The Object class is the parent class of all the classes in java by default.In 
other words, it is the topmost class of java.
The Object class is beneficial if you want to refer any object whose type you 
dont know. Notice that parent class reference variable can refer the child 
class object, know as upcasting.

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Contributed on Mar 08 2022

vizard

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java object class

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class Student{  
 //defining fields  
 int id;//field or data member or instance variable  
 String name;  
 //creating main method inside the Student class  
 public static void main(String args[]){  
  //Creating an object or instance  
  Student s1=new Student();//creating an object of Student  
  //Printing values of the object  
  System.out.println(s1.id);//accessing member through reference variable  
  System.out.println(s1.name);  
 }  
}

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Source: www.codeexampler.com

Tags: java object-class

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Contributed on Nov 17 2021

Colorful Coding

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What are All the Different Ways to Create an Object in Java?

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Using new keyword.
Using new instance.
Using clone() method.
Using deserialization.
Using newInstance() method of Constructor class.

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Contributed on Dec 17 2022

Deepika Sahu

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what is object in java

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