no you can have a class with no public methods and even with a a private constructor
public class Example {
//constructor
private Example(){
}
}
The keyword public is an access specifier. A variable or a method that is declared public is publicly accessible to any member of the project. Any class or method can freely access other public methods and variables of another class.
not exactly..... only If your class is public then the java program name should be the public class name with extension Sample.java >> public class Sample { public static void main(String[] args) { ..... } } NonPublicClass.java class SomeOtherName { ......... }
No. There can be multiple java classes in the same .java file, but the name of the file must match the name of the public class in the file.
the method of an class that can is triggered when starting a Java application e.g. by running the command: "java MyProgram" Answer Public is an Access Specifier,static is a keyword which illustrates that method shared along all the classes.void illustrates that this method will not have any return type.main is the method which string has an argument. Public specifier makes the method visible outside the Class and because of the static nature of the method, JVM can call this main method without instantiating the class 'MyProgram'.
You declare a method final in Java when you do not want any subclasses of your class to be able to override the method. I have also heard that this allows the Java compiler to make more intelligent decisions. For example, it supposedly allows Java to decide when to make a method inline. (Note that this is all unconfirmed)
Nothing will happen. There is no restriction that every Java class must have a main method. The only program is that, this class cannot be executed as a standalone java program.
The keyword public is an access specifier. A variable or a method that is declared public is publicly accessible to any member of the project. Any class or method can freely access other public methods and variables of another class.
not exactly..... only If your class is public then the java program name should be the public class name with extension Sample.java >> public class Sample { public static void main(String[] args) { ..... } } NonPublicClass.java class SomeOtherName { ......... }
"public" is quite obvious - it must be accessible from outside. I am not quite sure about static; but I believe that is because the class is run directly, rather than creating an object based on the class.
No, all classes MUST have a main method.
No. There can be multiple java classes in the same .java file, but the name of the file must match the name of the public class in the file.
Some naming conventions/standards for Java classes are: a. A java file must be saved with the name of the public class in the file b. A Java file can have only one public class but can have any number of other classes c. The class names must be in Camel Case. Ex: AnExampleClassForWikiAnswers is how class names should be coded d. Even methods must be in camel case with one difference that the first alphabet must be in lower case. Ex: getSampleDataFrWiki()
the method of an class that can is triggered when starting a Java application e.g. by running the command: "java MyProgram" Answer Public is an Access Specifier,static is a keyword which illustrates that method shared along all the classes.void illustrates that this method will not have any return type.main is the method which string has an argument. Public specifier makes the method visible outside the Class and because of the static nature of the method, JVM can call this main method without instantiating the class 'MyProgram'.
The name of the .java file should exactly match with the name of the public class in the file. Ex: public class Test { ..... } this file should be saved as Test.java
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.
All applications must start their execution from somewhere. In java that is the main method of a class.
You declare a method final in Java when you do not want any subclasses of your class to be able to override the method. I have also heard that this allows the Java compiler to make more intelligent decisions. For example, it supposedly allows Java to decide when to make a method inline. (Note that this is all unconfirmed)