how to create a constructor in java
class Other{
public Other(String message){
System.out.println(message);
}
}
class scratch{
public static void main(String[] args) {
Other method = new Other("Hey");
//prints Hey to the console
}
}java constructor
class MyClass {
public MyClass () {
//constructor code
}
}constructor
A constructor is a special method used to initialize objects in java.
we use constructors to initialize all variables in the class
when an object is created. As and when an object
is created it is initialized automatically with the help of
constructor in java.
We have two types of constructors:
Default Constructor
Parameterized Constructor
public classname(){
}
public classname(parameters list){
}constructor
public class ConsDemo {
public static void main(String args[]) {
MyClass t1 = new MyClass();
MyClass t2 = new MyClass();
System.out.println(t1.num + " " + t2.num);
}
}constructor
A constructor is a special method used to initialize objects in java.
we use constructors to initialize all variables in the class
when an object is created. As and when an object
is created it is initialized automatically with the help of
constructor in java.
We have two types of constructors:
Default Constructor
Parameterized Constructor
public classname(){
}
public classname(parameters list){
}
constructor calls:
1. only constructor can call other constructor
2. constructor cannot be called by its name, this() is used for calling
3. constructor call needs to be at the first step
4. One constructor can only call one constructor
5. Contractor cannot call itself or contain itselfconstructor
class Car {
constructor(name) {
this.brand = name;
}
present() {
return 'I have a ' + this.brand;
}
}
mycar = new Car("Ford");
mycar.present();Copyright © 2021 Codeinu
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