Questions on shift operators in java

Hi,
I have two questions and I would be grateful if you could give some suggestions.
1. int x = -1; x = x >>> 32;Can you suggest the value of x after this operation. I thought it would some positive number, but I am wrong.
2. What is -50 >> 1 ?Can you suggest the answer for this one too? I thought it would be "a negative number with very large magnitude", but it seems I am wrong on this one too.
Thanks a lot for your answers!

priyankabhar wrote:
2. What is -50 >> 1 ?
">>" is arithmetic shift right, it shifts in copies of the sign bit; so if your number was negative, it shifts in 1's; otherwise it shifts in 0's. The effect of this is dividing a signed number by 2^(number of bits you shifted), rounding down towards negative infinity.
So the answer is -25 (-50 / 2); you didn't have to worry about rounding in this case.
priyankabhar wrote:
I thought it would be "a negative number with very large magnitude"how did you figure that?

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<code>
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Hi All,
I am new to Java Bean and wonder what is the main
difference to use a Bean or an Object in the jsp. The first thing to realize is that JavaBeans are just Plain Old Java Objects (POJOs) that follow a specific set of semantics (get/set methods, etc...). So what is the difference between a Bean and an Object? Nothing.
<jsp:useBean id="cart" scope="session" class="ShoppingCart" />
In the above code, I can also create a object of
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following way.
ShoppingCart cart = new ShoppingCart();
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As in my mind, a normal class can also
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But someone may say that, there is a scope="session",
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It may be
a point but it can be easily solved but putting the
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All of above can be solved by other means, for
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1) A public, no-argument constructor
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4) Contain any necessary event handling methods. Depending on the purpose of the bean, you may include event handlers for when the properties change.
I am really get confused with it, and
really want to know what is the main point(s) of
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<%
ShoppingCart cart = session.getAttribute("cart");
if (cart == null) {
 cart = new ShoppingCart();
 session.setAttribute("cart", cart);
%>Then later where I want to print a total:
<% out.print(cart.getTotal() %>Or, if the cart is a JavaBean I could do this:
<jsp:useBean id="cart" class="my.pack.ShoppingCart" scope="session"/>
Then later on:
<jsp:getProperty name="cart" property="total"/>
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}Or you could use:
<jsp:useBean id="cart" class="my.pack.ShoppingCart" scope="session">
<jsp:setProperty name="cart" property="*"/>
</jsp:useBean>The second seems easier to me.
It also allows you to use your objects in more varied cases - for example, JSTL (the standard tag libraries) and EL (expression language) only work with JavaBeans (objects that follow the JavaBeans conventions) because they expect objects to have the no-arg constuctor, and properties accessed/changed via getXXX and setXXX methods.
>
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-definition: memory is allocated.
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Squall867 wrote:
Hi, we know the difference between declaration and definition:
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-definition: memory is allocated.That's not the definition I learned, back when dinosaurs roamed the earth, men lived in caves and used pterodactyls for airplanes, and computers were made of rocks.
Is there a way in java to simply declare a variable? According to me just arrays can be declared withThis is a pretty meaningless question.
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Is there a way in java to simply declare a variable? According to me just arrays can be declared with
String[] arrayString;
This declares a reference variable of type reference to array of String. It will occupy at least 4 bytes.
while istructions like
String myString;are definition as they allocate at least a String reference on the stack...am I wrong?This declares a reference variable of type reference to String. It will occupy at least 4 bytes.
Note that an array reference variable is no different than any other reference variable.
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HeavenBoy wrote:
Hello , im new to Java , i find kinda weird how Java creates Forms , its pretty simple in Oracle Forms ,
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>
when i learned about the Layout Managers that Java provides i found out how much code one have to write just to create a simple form ,my question to the experienced java developers : what do you do to create a form , do you hard code it ? , or do you use something like GUI Builder in an IDE like NetBeans for example? and is the code generated by this builder easy to deal with and modify ?
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Questions on shift operators in java

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