Convert Object to Primitive Type in Java

public class WrappToPrim{
  public static void main(String[] args) {
    Integer obj1 = Integer.valueOf(19);
    Double obj2 = Double.valueOf(9.17);
    Boolean obj3 = Boolean.valueOf(true);

    int var1 = obj1.intValue();
    double var2 = obj2.doubleValue();
    boolean var3 = obj3.booleanValue();

    System.out.println("The value of integer variable is " + var1);
    System.out.println("The value of double variable is " + var2);
    System.out.println("The value of boolean variable is " + var3);
  }
} 

The value of integer variable is 19
The value of double variable is 9.17
The value of boolean variable is true

• In this program, initially some objects of  Java wrapper classes (int, double, and boolean) have been initialized.
• These objects are then converted to their corresponding primitive types. Int, double, and Boolean variables are assigned values by using the methods: intValue(), doubleValue(), and booleanValue() of Wrapper class respectively.
• This conversion from objects to primitive types and vice versa is done by the Java compiler automatically. This concept is referred as autoboxing and unboxing.