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The xxxValue () method - It converts to Java the numeric value of the object that invokes the method, into a primitive data type that is returned from the method.

byte byteValue () // Convert to byte
short shortValue () // Convert to short
int intValue () // Convert to int
long longValue () // Convert to long
float floatValue () // Convert to float
double doubleValue () // Convert to double

Detailed information about the parameters:

public class Test {

   public static void main (String args []) {
      Integer x = 5;
      // Convert int to byte and return a primitive data type byte
      System.out.println (x.byteValue ());

      // Converts an int to double and returns a primitive data type double
      System.out.println (x.doubleValue ());

      // Convert int to long and returns a primitive data type long
      System.out.println (x.longValue ());
   }
}

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