the RGB class has a stic values() method that returns an array.

the second constant in the list can be accessed using RGB.GREEN

it is wrong to compare two RGB values using ==. The method equals() must be used instead

RGB.BLUE.ordinal() will return 2

RED, GREEN and BLUE are public static final attributes of the RGB enumerated type

StringBuilder

Integer

String

StringBuffer

5

-1

0

3

code will not compile

i.stringValue()

s.toString(i)

Integer.stringValue(i)

(String)i

i.toString()

Math

Integer

Double

Number

i.intValue()

i.toInt()

Integer.toInt(i)

i

new int(i)

they can directly access instance members of the class using their short name

the static attributes that such a block accesses must be declared before the block in the class definition

when using multiple static initializer blocks in the same class, their order matters

they can directly call static methods of the class using their short name.

a class may have multiple static initializer blocks

Scanner sc=new Scanner(s); sc.next(); System.out.println(sc.next());

String[] ss = s.split(" "); System.out.println(ss[1]);

System.out.println(s.replace("one ", "").replace(" three","");

System.out.println(s.substring(s.indexOf(" ")+1, s.lastIndexOf(" ")));

System.out.println(s.substring(4,6));

Integer.fromString(s)

Integer.valueOf(s)

s.parseInt()

String.valueOf(s)

code will not compile because enum types do not have a name() method

code will not compile because enum types cannot be used with switch

code will compile successfully

code will not compile because case ONE should have been written case Numbers.ONE

code will not compile because the switch statement doesn't contain any break statements.

Boolean

Int

Integer

Character

Char

String

they can directly access static members of the class using their short name

they can directly access instance attributes of the same class using this

they can be called using the syntax ClassName.methodName()

they can’t be called from static initializer blocks

they can directly call instance methods of the same class using their short name

they can directly call other static methods of the class using their short name

inside a control structure(if, while)

as a member of a Java class

inside a method of a Java class

outside other Java classes

they can have attributes (which must be declared final) and programmer-defined methods

they can be instantiated outside the enum definition by using the new operator

their constructors must have private or default access level

they define new data types and act as classes that have a limited set of instances

they have a set of predefined methods

the code will not compile because of an error on line 4: there is no such StringBuffer constructor

the code will compile successfully

the code will not compile because of an error on line 2: references can't be declared as blank finals

the code will not compile because of an error on line 4: it is too late to initialize s - it already has the default value null that cannot be changed any more

the code will not compile because of an error on line 5: object s is final and therefore can't be modified