What is final?

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What is final?

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A final class can't be extended ie., final class may not be subclassed. A final method can't be overridden when its class is inherited. You can't change value of a final variable (is a constant).

2013-05-01, 2006👍, 0💬

What if the static modifier is removed from the signature of the main method?
What if the static modifier is removed from the signature of the main method? Program compiles. But at runtime throws an error "NoSuchMethodError". 2013-05-02, 3149👍, 0💬

What if I do not provide the String array as the argument to the method?
What if I do not provide the String array as the argument to the method? Program compiles but throws a runtime error "NoSuchMethodError". 2013-05-03, 2665👍, 0💬

What if I write static public void instead of public static void?
What if I write static public void instead of public static void? Program compiles and runs properly. 2013-05-03, 2139👍, 0💬

What is final?
What is final? A final class can't be extended ie., final class may not be subclassed. A final method can't be overridden when its class is inherited. You can't change value of a final variable (is a constant). 2013-05-01, 2007👍, 0💬

What is static in java?
What is static in java? Static means one per class, not one for each object no matter how many instance of a class might exist. This means that you can use them without creating an instance of a class.Static methods are implicitly final, because overriding is done based on the type of the object, an... 2013-05-01, 2003👍, 0💬

State the significance of public, private, protected, default modifiers both singly and in combination and state the effect of
State the significance of public, private, protected, default modifiers both singly and in combination and state the effect of package relationships on declared items qualified by these modifiers. public : Public class is visible in other packages, field is visible everywhere (class must be public t... 2013-04-30, 1983👍, 0💬

What if the main method is declared as private?
What if the main method is declared as private? The program compiles properly but at runtime it will give "Main method not public." message. 2013-05-02, 1982👍, 0💬

What is an abstract class?
What is an abstract class? Abstract class must be extended/subclassed (to be useful). It serves as a template. A class that is abstract may not be instantiated (ie, you may not call its constructor), abstract class may contain static data. Any class with an abstract method is automatically abstract ... 2013-04-30, 1958👍, 0💬

What is an Iterator?
What is an Iterator? Some of the collection classes provide traversal of their contents via a java.util.Iterator interface. This interface allows you to walk through a collection of objects, operating on each object in turn. Remember when using Iterators that they contain a snapshot of the collectio... 2013-04-29, 1932👍, 0💬

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