What is newInstance() method in Java?

newInstance() method

The newInstance() method of Class class and Constructor class is used to create a new instance of the class.

The newInstance() method of Class class can invoke zero-argument constructor whereas newInstance() method of Constructor class can invoke any number of arguments. So Constructor class is preferred over Class class.

---

Syntax of newInstance() method of Class class

public T newInstance()throws InstantiationException,IllegalAccessException

Here T is the generic version. You can think it like Object class. You will learn about generics later.

---

Example of newInstance() method

Let's see the simple example to use newInstance() method.

1. class Simple{  
2.  void message(){System.out.println("Hello Java");}  
3. }  
4.   
5. class Test{  
6.  public static void main(String args[]){  
7.   try{  
8.   Class c=Class.forName("Simple");  
9.   Simple s=(Simple)c.newInstance();  
10.   s.message();  
11.   
12.   }catch(Exception e){System.out.println(e);}  
13.   
14.  }  
15. }  

Output:Hello java