like this:
import static com.showboy.Myclass;
public class Anotherclass{}
And what's the difference between "import static com.showboy.Myclass" and "import com.showboy.Myclass"?
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As we have access modifiers for methods and constructors, do we have it for static blocks? if yes what is the significance?
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How and where should we use a Static modifier for:
1. Field and
2. Method?
For example in java.lang.Math class, the fields methods like abs(), atan(), cos() etc are static, i.e. ... |
I have read this sentence in a book but I didn't understand it:
A field that is both static and final has only one piece of storage that cannot be ... |
I am having difficulty understanding what a "static" method and "static" variable is and it is causing me problems with my code. Here is the code I am having difficulty with:
...
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Just got confused , yep it's clear now.Thanks dude. I have one more question. On declaring a variable as static & final with out initilizing it a value like this. public static final int SOME_VAR; It gets automatically initilized to "0" [ Exclude the "" ], but a non static final variable doesn't, a developer is allowed to initilize it before ... |
Okay, let's consider those two methods:public static int parseInt(String s) public int intValue() Method parseInt's job is to convert a String into an int (if you want to convert a String into an Integer object, use valueOf). Method intValue's job can be said to be either return the int value of "this" Integer, or to convert an Integer to an int. ... |
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Hi I am just wondering, if I am not sure what modifier to use for my member functions, should I always use "public static" modifier? I read a book, it says that it's always better to use factory method. So I set my defult constructor to private and create a public static getInstance function for creating objects. Is it true? Thanks ... |
Static variable is initialized at the class level only, while non-static variable can only be declared at class level but can not be initialized at class level. If a variable is initialized at class level then it gives error at compile time. Is this correct ? Can a static variable's value be changed in the class ? If yes, then that ... |
Abdul Rahman wrote:Hi, Appreciate if someone can explain me the scenarios when static modifier should be used with variables and methods. Why and when should we make a method static and is there any loophole making a variable or a method static. You can consider the classes as providing a few special services that objects can't provide Consider the ... |
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SOLVED Hello, I've recently started coding Java. I took a C/C+ class last semester. This is a program I made for my class, but just as I was finishing my "main" method, I came across this error. I'm using Eclipse as my IDE Cannot make a static reference to the non-static field invoice1 TestRental.java /Assignment 2/src line 24 Java Problem the ... |
OK, so since runNow() in A is private the compiler determines that regardless of the available methods in any of it's sub classes that since we declared the original array reference as "A" that it will invoke the runNow() in A. My mistake about the second part that you mention. You are correct. runNow() in B is NOT static, but the ... |
If something is static, it belongs to a class. So, it wouldn't make sense to declare something as static while it is inside a specific method, because the rules of scope say the class couldn't see it. Instead, declare it in the scope of the whole class, before any methods are declared. This way, the whole class can see it, which ... |
Performance improvement? I seriously doubt it. If your query is in fact static and final, it should be declared as such. But as you're creating a prepared statement with it, which I assume you will use multiple times, it will get used only once anyway. In any case, evaluating the query itself is going to take a million times longer than ... |