面向对象增强的包装类（Manchester United）有木有

public class Primitive2Wrapper
{
    public static void main(String[] args)
    {
        boolean bl = true;
        Boolean blobj = new Boolean(bl);
        
        int it = 5;
        Integer itObj = new Integer(it);
        
        Float fl = new Float("4.56");
        
        System.out.println("blobj = " + blobj);
        
        System.out.println("itObj = " + itObj);
        
        System.out.println("fl = " + fl);
    }
}

blobj = true
itObj = 5
fl = 4.56

public class AutoBoxingUnboxing
{
    public static void main(String[] args)
    {
        //直接把一个基本类型变量赋给Integer对象
        Integer inObj = 5;
        
        //直接把一个boolean类型变量赋给一个Object类型变量
        Object boolObj = true;
        
        //直接把一个Integer对象赋给int类型变量
        int it = inObj;
        
        if(boolObj instanceof Boolean)
        {
            //先把Object对象强制类型转换为Boolean类型,再赋给boolean变量
            boolean b = (Boolean)boolObj;
            System.out.println(b);
        }
    }
}