Using Wrapper Conversion Utilities : Wrapper classes « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. Wrapper classes

public class MainClass{
    public static void main(String[] argv){

        Integer i2 = new Integer(42);  
        byte b = i2.byteValue();       
        short s = i2.shortValue();     
                                       
        double d = i2.doubleValue();   
                                       

        Float f2 = new Float(3.14f);   
         s = f2.shortValue();     
                                       
        System.out.println(s);         
    }
}

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