What is the result of compiling and running the following code?public class Tester{static int x = 4;public Tester(){System.out.print(this.x); // line 1Tester();}public static void Tester(){ // line 2System.out.print(this.x); // line 3}public static void main(String... args){ // line 4new Tester();}}

Declaration and Access Control
What is the result of compiling and running the following code?public class Tester{static int x = 4;public Tester(){System.out.print(this.x); // line 1Tester();}public static void Tester(){ // line 2System.out.print(this.x); // line 3}public static void main(String... args){ // line 4new Tester();}}

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 3 (static methods can't invoke this)

Compile error at line 2 (constructors can't be static)

Compile error at line 4 (invalid argument type for method main )

44

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 3 (static methods can't invoke this)

Compile error at line 2 (constructors can't be static)

Compile error at line 4 (invalid argument type for method main )

44

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Declaration and Access Control
A package is a collection of

Editing tools and Interfaces

Editing tools

Interfaces

Classes

Classes and Interfaces

Editing tools and Interfaces

Editing tools

Interfaces

Classes

Classes and Interfaces

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Declaration and Access Control
What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

Compile time error.

one two 0

one two 10

one two 1

None of these

Compile time error.

one two 0

one two 10

one two 1

None of these

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Declaration and Access Control
Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.

Only (III)

(II) and (III)

Only (I)

(I), (II) and (III)

(I) and (II)

Only (III)

(II) and (III)

Only (I)

(I), (II) and (III)

(I) and (II)

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Declaration and Access Control
What is the result of compiling and running the following code?public class Tester{static int x = 4;int y = 9; public Tester(){System.out.print(this.x); // line 1printVariables();}public static void printVariables(){System.out.print(x); // line 2System.out.print(y); // line 3}public static void main(String... args) { // line 4new Tester();}}

Compile error at line 3 (static methods can't make reference to non-static variables)

49

Compile error at line 2 (must access x by writing Tester.x)

Compile error at line 4 (invalid argument type for method main)

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 3 (static methods can't make reference to non-static variables)

49

Compile error at line 2 (must access x by writing Tester.x)

Compile error at line 4 (invalid argument type for method main)

Compile error at line 1 (static x must be only accessed inside static methods)

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Declaration and Access Control
Consider the following two classes declared and defined in two different packages, what can be added in class B to form what considered a correct access to class A from main() method of class B?package subPackage;public class A { }package anotherPackage;// line 1public class B{public static void main(String[] args){// line 2}}1. At line1 add noting; At line2 add: new A();2. At line 1 add: import package.; at line 2 add : new subPackage.A();3. At line 1 add: import subPackage.; at line 2 add : new A();4. At line 1 add: import subPackage.A; at line 2 add : new A();

1 and 2

3 and 4

1 and 3

2 and 4

1 and 2

3 and 4

1 and 3

2 and 4

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Declaration and Access Control

Declaration and Access Control A package is a collection of

Declaration and Access Control What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

Declaration and Access Control Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.

Declaration and Access Control
A package is a collection of

Declaration and Access Control
What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

Declaration and Access Control
Choose the correct statement. Restriction on static methods are: I. They can only call other static methods.II. They must only access static data.III. They cannot refer this or super in any way.