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Why one public class in one source file in java?
The rules of Java state that the top-level main class needs to be declared "public." The idea behind this is probably because if it was not declared "public," then it would have to be either "private" or "protected." Since these other two types of classes can only be used by classes of the same package (or more local), and thus a non-public main class could not be called from the outside.
Is it possible for your Alice program to have more than one instance in a class?
It is possible to have more than one instance of the same class, because the class is simply the blue print for the actual object.
What is difference between partial Class and class?
If using 1 class per file as the standard, then it would be easier to understand that a partial class contains only a portion of the class definition in one file, while the other (may have more than one file) have the rest of the code belong to that class. One good example is the field definitions (data members) in one file, while the another file supply with behaviors that may not have anything to do with the data fields.
Why do file name and public class name always coincide in Java?
First of all, it only has to be the same when the class is public. And there is no explicit reason for that, it's just a convention that came along with old versions of java and people got used to it... They say it's because of the limited capabilities of the compiler to compile dependencies. When packages are stored in a file system (?7.2.1), the host system may choose to enforce the restriction that it is a compile-time error if a type is not found in a file under a name composed of the type name plus an extension (such as .java or .jav) if either of the following is true: * The type is referred to by code in other compilation units of the package in which the type is declared. * The type is declared public (and therefore is potentially accessible from code in other packages). This restriction implies that there must be at most one such type per compilation unit. This restriction makes it easy for a compiler for the Java programming language or an implementation of the Java virtual machine to find a named class within a package; for example, the source code for a public type wet.sprocket.Toad would be found in a file Toad.java in the directory wet/sprocket, and the corresponding object code would be found in the file Toad.class in the same directory. When packages are stored in a database (?7.2.2), the host system must not impose such restrictions. In practice, many programmers choose to put each class or interface type in its own compilation unit, whether or not it is public or is referred to by code in other compilation units. It is not mandatory to say "file name equals to classname". > U can give your own name to your filename [ other than classname ] > at the time of compilation you just give your filename[other than classname] > After compilation you will get .class file with your class name.[classname.class] >.But at the time of loading ur program into JVM u just have to give the class name , This is possible even the main() is public/private. for eg:-consider have created a program in java with file name Ashish n class name is batra,now at the time of compilation u have to write "javac ashish.java" at the command prompt and at the same time the jvm create the .class object in the bin directory with filename =batra(batra.class) .Now at the time of running the program u have to write "java batra" at the command prompt. We say this statment that the file name should be same as the class name to make sure there is no confusion while compiling n running the program .Consider u have created many programs in java and now u want to run any one of them ,then it would be very difficult for u to recall the class name of that particular program .So to make it a simpler we offenly say that the class name should be same as the file name.
Can a source file contain more than one class declaration?
Yes, a source file can contain more than one class declaration. In many programming languages, such as Java and C#, it is common to define multiple classes within a single file, though typically only one can be declared as public and must match the filename. However, in languages like Python, there are no such restrictions, allowing for multiple classes to be declared freely within a single file. This practice can help organize related classes together, but it's essential to maintain clarity and readability.
Can a .java file contain more than one java classes?
Yes, it can. However, there can only be one public class per .java file, as public classes must have the same name as the source file.
Why one public class in one source file in java?
The rules of Java state that the top-level main class needs to be declared "public." The idea behind this is probably because if it was not declared "public," then it would have to be either "private" or "protected." Since these other two types of classes can only be used by classes of the same package (or more local), and thus a non-public main class could not be called from the outside.
In Pokemon is it possible to have more than one file?
If by file you mean game then yes it is possible. Go to file-load game and chose an empty slot. HOpe this helps!
Is it possible for your Alice program to have more than one instance in a class?
It is possible to have more than one instance of the same class, because the class is simply the blue print for the actual object.
What is difference between partial Class and class?
If using 1 class per file as the standard, then it would be easier to understand that a partial class contains only a portion of the class definition in one file, while the other (may have more than one file) have the rest of the code belong to that class. One good example is the field definitions (data members) in one file, while the another file supply with behaviors that may not have anything to do with the data fields.
Why do file name and public class name always coincide in Java?
First of all, it only has to be the same when the class is public. And there is no explicit reason for that, it's just a convention that came along with old versions of java and people got used to it... They say it's because of the limited capabilities of the compiler to compile dependencies. When packages are stored in a file system (?7.2.1), the host system may choose to enforce the restriction that it is a compile-time error if a type is not found in a file under a name composed of the type name plus an extension (such as .java or .jav) if either of the following is true: * The type is referred to by code in other compilation units of the package in which the type is declared. * The type is declared public (and therefore is potentially accessible from code in other packages). This restriction implies that there must be at most one such type per compilation unit. This restriction makes it easy for a compiler for the Java programming language or an implementation of the Java virtual machine to find a named class within a package; for example, the source code for a public type wet.sprocket.Toad would be found in a file Toad.java in the directory wet/sprocket, and the corresponding object code would be found in the file Toad.class in the same directory. When packages are stored in a database (?7.2.2), the host system must not impose such restrictions. In practice, many programmers choose to put each class or interface type in its own compilation unit, whether or not it is public or is referred to by code in other compilation units. It is not mandatory to say "file name equals to classname". > U can give your own name to your filename [ other than classname ] > at the time of compilation you just give your filename[other than classname] > After compilation you will get .class file with your class name.[classname.class] >.But at the time of loading ur program into JVM u just have to give the class name , This is possible even the main() is public/private. for eg:-consider have created a program in java with file name Ashish n class name is batra,now at the time of compilation u have to write "javac ashish.java" at the command prompt and at the same time the jvm create the .class object in the bin directory with filename =batra(batra.class) .Now at the time of running the program u have to write "java batra" at the command prompt. We say this statment that the file name should be same as the class name to make sure there is no confusion while compiling n running the program .Consider u have created many programs in java and now u want to run any one of them ,then it would be very difficult for u to recall the class name of that particular program .So to make it a simpler we offenly say that the class name should be same as the file name.
Can a source file contain more than one class declaration?
Yes, a source file can contain more than one class declaration. In many programming languages, such as Java and C#, it is common to define multiple classes within a single file, though typically only one can be declared as public and must match the filename. However, in languages like Python, there are no such restrictions, allowing for multiple classes to be declared freely within a single file. This practice can help organize related classes together, but it's essential to maintain clarity and readability.
What is filewriter?
It is a class that creates a file and allows you to write into the file. A better class for Java I/O is the PrintWriter class, which is more natural since its methods correspond to System.out, i.e. file.print("blah blah blah"), rather than remembering file.write();
Is it possible that the class of service you searched for may not be available on one or more flights?
Yes, it is possible that the class of service you searched for may not be available on some flights.
What is derived class in brief?
A derived class is any class that inherits from one or more other classes, known as base classes. The derived class inherits the sum total of all public and protected members of all its base classes, including their base classes. The derived class is a more specialised form of its base classes. Any members of the base classes that are declared virtual can be overridden, such that calling the base class method directly actually invokes the derived class method, thus enabling polymorphic behaviour.
How can acting class help you?
It can help you be a better public speaker and be more sociable.
What is single inheritance in c plus plus?
Multiple inheritance occurs when a class is derived directly from two or more base classes. class b1 {}; class b2 {}; class d: public b1, public b2 {}; // multiple inheritance class
