How you can create an object of a class in java?

Answer 1

for creating objects use the new operator along with a call to the constructor. for ex Triangle t = new Triangle(); In this statement the new operator creates a triangle object and the constructor is called which initializes the object and then new returns a reference of the object which is stored in the reference var "t" of type Triangle.

Answer 2

To create an instance of an object, you just need to call its constructor. This, specified in the object's class file, will create the object. For example, to create a new object dog:

Dog woof = new Dog();

woof is the name of my new dog, Dog() is the constructor.

Answer 3

We can create instances of a class by using the newkeyword.

class MyClass {

public static void main(String[] args) {

// Create a new Object object

Object obj = new Object();

// Create a new MyClass object

MyClass mc = new MyClass();

// Create a new String object

String str = new String();

// Create a new String object with some parameters

str = new String("This is a String");

}

}

Answer 4

Objects are constructed. You can't make a new object without invoking a constructor. In fact, you can't make a new object without invoking not just the constructor of the object's actual class type, but also the constructor of each of its superclasses including the Object class itself! Constructors are the code that runs whenever you use the keyword new.

Constructor Basics

Every class, including abstract classes, MUST have a constructor. Hard Code that into your brain. But just because a class must have one, doesn't mean the programmer has to type it. A constructor looks like this:

class Car {

Car() { } // The constructor for the Car class

}

You notice anything missing in the declaration above? There's no return type! Two key points to remember about constructors are that they have no return type and their names must exactly match the class name. Typically, constructors are used to initialize instance variable state, as follows:

class Car {

int size;

String name;

Car(String name, int size) {

this.name = name;

this.size = size;

}

}

In the preceding code example, the Car class does not have a no-arg constructor. That means the following will fail to compile:

Car f = new Car(); // Won't compile, no matching constructor

but the following will compile:

Car f = new Car("Ford", 43); // No problem. Arguments match

// the Car constructor.

So it's very common for a class to have a no-arg constructor, regardless of how many other overloaded constructors are in the class (constructors can be overloaded just like methods). You can't always make that work for your classes; occasionally you have a class where it makes no sense to create an instance without supplying information to the constructor. A java.awt.Color object, for example, can't be created by calling a no-arg constructor, because that would be like saying to the JVM, "Make me a new Color object, and I really don't care what color it is...." Do you seriously want the JVM making your color choices?

Answer 5

Objects are created when the JVM reaches a piece of code that has an invocation of the "new" keyword against some class name.

And, the "new" keyword is how objects get created in Java.

Ex:

Ferrari obj = new Ferrari();

The above line would create an object of the class Ferrari when executed. This line would in turn call the constructor of the Ferrari class which in turn creates and initializes an object of that class.

Answer 6

You can create an object in java using the new keyword. The new keyword invocation will call the constructor of the class and then create an object of the class.

Ex:

private ExampleTest obj = new ExampleTest();

here obj is the object that will get created when we use the new keyword on the class name

Answer 7

You would usually use the "new" operator:new MyClass();

If the constructor requires parameters, you pass them inside the parentheses. The object reference will usually be assigned to a variable, so you can use it later:

MyClass x; // Variable declaration

x = new MyClass(); // Instantiate an object, and assign the object reference to "x"

Answer 8

the new operator is used to create objects in java

Answer 9

class Demo

{

public static void main(String[] args)

{

Demo d = new Demo();//the class is instantiated to create an object

}

}

Answer 10

You cannot create an object in Java without using the newoperator.