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.
class Simple{
void message(){System.out.println("Hello Java");}
}
class Test{
public static void main(String args[]){
try{
Class c=Class.forName("Simple");
Simple s=(Simple)c.newInstance();
s.message();
}catch(Exception e){System.out.println(e);}
}
} 来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/1741/viewspace-2798785/ ，如需转载，请注明出处，否则将追究法律责任。
