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Previous Chapter

OCA Java SE 8 Programmer I Certification Guide

OCA Java SE 8 Programmer I Certification Guide

Index

[SYMBOL][A][B][C][D][E][F][G][H][I][J][K][L][M][N][O][P][Q][R][S][T][U][V][W][Y]

SYMBOL

-- operator % operator && operator, 2^nd /* character */ character * character, 2^nd * operator /** character *= operator ... (ellipsis), 2^nd !. operator // character @ sign [ ] (square brackets), 2^nd, 3^rd _ (underscores), 2^nd { } (curly braces), 2^nd, 3^rd, 4^th, 5^th, 6^th || operator, 2^nd + operator, 2^nd ++ operator += operator, 2^nd, 3^rd, 4^th < operator <= operator <> (angle brackets) = (assignment operator), 2^nd, 3^rd, 4^th, 5^th -= operator /= operator != operator, comparing primitives for equality using == operator, comparing primitives for equality using > operator >= operator : (colon) . (dot notation), 2^nd, 3^rd, 4^th " (double quotes), 2^nd, 3^rd - (negative sign) ; (semicolons), 2^nd, 3^rd 1Z0-808 (OCA Java SE 8 Programmer I exam) 1Z0-809 (OCP Java SE 8 Programmer II exam) 1Z0-811 (Java Junior Associate) certification ( ) (parentheses) ' character - operator / operator ?: operator

A

abstract base class, vs. concrete base class abstract class type, arrays of abstract interface abstract keyword abstract methods extending multiple interfaces with same abstract method names implementing implementing multiple interfaces with same abstract method names overview, 2^nd polymorphism with abstract modifier abstract class abstract interface abstract method abstract variables overview abstraction, 2^nd ac value access modifiers default access (package access) Java entities and, 2^nd number of overview, 2^nd private protected public what they control accessing object fields accessor method acctNumber acctType acl value add method addAll method addSeconds( ) method age variable allocating arrays AND operator, 2^nd angle brackets Animal class, 2^nd AnnualExam class, 2^nd anonymous classes append( ) method overview StringBuilder class application termination arguments arithmetic operators, 2^nd ArithmeticException, 2^nd ArrayAccess class ArrayIndexOutOfBoundsException, 2^nd, 3^rd, 4^th, 5^th, 6^th, 7^th, 8^th ArrayList class accessing elements of, 2^nd adding elements to, 2^nd clearing elements cloning creating creating arrays from deleting elements of modifying elements of overview, 2^nd arrays of abstract class type allocating, 2^nd asymmetrical multidimensional creating from ArrayList declaring, 2^nd initializing of interface type members of of object overview, 2^nd ASCII values assignedArrList variable assigning primitives assignment operator, 2^nd, 3^rd, 4^th, 5^th, 6^th, 7^th assignments associate subpackage asterisk character, 2^nd Astronaut class asymmetrical arrays asymmetrical multidimensional arrays at prefix atDate( ) method atTime( ) method author variable autoboxing overview wrapper classes automatic memory management, 2^nd, 3^rd average variable averageOfFirst100Integers method avg variable, 2^nd

B

b1 variable b2 variable b3 variable BankAccount class bankVault variable base class baseDecimal variable BaseInterface1, 2^nd, 3^rd BaseInterface2, 2^nd, 3^rd binary number system binVal variable BlackInk class bold font Book class, 2^nd, 3^rd bookConferenceRoom method BookNotFoundException Boolean category Boolean class, 2^nd, 3^rd boolean data type, 2^nd, 3^rd boolean variable, 2^nd Boolean.FALSE static constant Boolean.parseBoolean( ) method Boolean.TRUE static constant booleanValue( ) method break outer break statement, 2^nd, 3^rd, 4^th building package, 2^nd bunsAvailable variable byte argument Byte class, 2^nd byte data type, 2^nd bytecode byteValue( ) method

C

c variable calcAverage method, 2^nd, 3^rd, 4^th calendar data DateTimeFormatter accessing formatting date or time objects using instantiating overview parsing date or time objects using LocalDate converting to another type creating manipulating querying LocalDateTime LocalTime combining with another type creating manipulating querying using constants overview Period converting to another type instantiating manipulating manipulating LocalDate and LocalDateTime using querying instances case keyword case-sensitive casting need for overview, 2^nd of variable to another type catch block certificates certification package, 2^nd, 3^rd CertView chaining methods char argument char array methods of String don’t modify overview, 2^nd char data type, 2^nd, 3^rd character category (unsigned integer) Character class, 2^nd, 3^rd, 4^th character primitive data types charAt( ) method, 2^nd charValue( ) method check method checked exceptions overview, 2^nd, 3^rd, 4^th throwing, 2^nd, 3^rd child classes class constructors class definition class keyword class method class variables comparing scope of comparing use of in different scopes overlapping scopes of overview ClassCastException, 2^nd, 3^rd, 4^th classes defining in packages, using package statement directory structure and package hierarchy overview rules to remember setting classpath for packaged classes inheritance with abstract base class vs. concrete base class base class members inherited by/not inherited by derived class derived class containing object of its base class derived classes defining additional properties and behaviors extending classes, benefits of need to inherit classes polymorphism with overview polymorphic methods (overridden methods) rules for overriding methods whether polymorphic methods always abstract whether polymorphism works with overloaded methods structure of class definition comments constructors import statement methods overview package statement variables Class.forName( ) method ClassLoader ClassNotFoundException classpath, setting for packaged classes classVariable cleanup code clone( ) method, 2^nd cloning, ArrayList close method code block Code Exhibit button code flow code fragments Collection class colon character ColorInk class command line, running Java program from comments com.mobile package common categories common classes common exceptions com.oracle.javacert package com.oracle.javacert.associate package compareTo( ) method compile-time checks concat method concatenation operators concrete base class, vs. abstract base class concurrency, 2^nd conditional constructs conductInterview method, 2^nd ConferenceHall class constant pool, String class constants implementing multiple interfaces with same constant names overview, 2^nd constructors, 2^nd, 3^rd access levels accessing using this keyword of base class, accessing using super default constructors vs. initialization blocks overloaded invoking from another constructor overview rules to remember user-defined contains method, 2^nd, 3^rd contiguous memory locations continue statement, 2^nd, 3^rd contracts count variable countPages method CourseBook class, 2^nd covariant return type CreateArrayList class crossRapid method ctr variable, 2^nd, 3^rd Cubicle class curly braces, 2^nd, 3^rd, 4^th, 5^th, 6^th, 7^th currentPosition( ) method Curtain class

D

D suffix dark gray background data hiding data types casting identifiers object reference variables differentiating from primitive variables overview operators arithmetic operators assignment operators logical operators overview precedence of relational operators overview primitive variables Boolean category character category (unsigned integer) names of primitive data types overview signed numeric category wrapper classes autoboxing and unboxing class hierarchy of comparing objects of difference between using valueOf method and constructors of objects of parsing string value to primitive type retrieving primitive values from Date class DateTimeException class, 2^nd DateTimeFormatter class accessing formatting date or time objects using instantiating overview, 2^nd parsing date or time objects using DateTimeParseException, 2^nd day variable dayCount variable daysOffWork method, 2^nd decimal integer decimal number system, 2^nd decimals declaring arrays, 2^nd decrement operator default access level, 2^nd default accessibility default constructors default keyword, 2^nd default label default methods extending multiple interfaces with same default method names implementing multiple interfaces with same default method names overriding overview polymorphism with default package, 2^nd, 3^rd defaultPlan( ) method defender method delete( ) method, StringBuilder class deleteCharAt( ) method, StringBuilder class deliverMobileApp method DemoExceptionInInitializerError class DemoExceptionInInitializerError2 class DemoThrowsException class derived classes, 2^nd, 3^rd descriptive comments digital signatures discount variable distance variable Doctor class dot operator, 2^nd, 3^rd, 4^th double argument Double class, 2^nd, 3^rd double data type, 2^nd double quotes, 2^nd, 3^rd, 4^th double type doubleValue( ) method do-while loop comparing with while loop overview DropOarException class Duration class

E

elementData variable, 2^nd ellipsis, 2^nd else blocks, 2^nd else statement Emp class, 2^nd emp variable, 2^nd, 3^rd emp1.startProjectWork( ) method emp2.startProjectWork( ) method Employee class, 2^nd, 3^rd, 4^th, 5^th, 6^th, 7^th, 8^th, 9^th, 10^th empty body encapsulation applying need for overview, 2^nd, 3^rd end-of-line comments endsWith( ) method, String class enhanced for loops comparing with for loop Iteration with limitations of nested overview ensureCapacity method entities, Java, access modifiers and, 2^nd enums epoch date equality, comparing objects for comparing objects of user-defined class contract of equals method equals method in class java.lang.Object incorrect method signature of equals method equals( ) method contract of incorrect method signature of in java.lang.Object class overview error-handling block errors, 2^nd, 3^rd, 4^th Exam class, 2^nd ExamQuestion class, 2^nd, 3^rd exception categories ExceptionInInitializerError, 2^nd exceptions benefits of handling categories of checked exceptions class hierarchy of exception classes errors identifying overview runtime exceptions classes and categories ArithmeticException ArrayIndexOutOfBoundsException ClassCastException ExceptionInInitializerError IllegalArgumentException IndexOutOfBoundsException NoClassDefFoundError NullPointerException NumberFormatException OutOfMemoryError overview StackOverflowError example of methods for throwing handle-or-declare rule overview throwing all types of exceptions throwing checked exception, 2nd, 3rd throwing errors throwing runtime exceptions, 2nd separate handling of throwing overview rethrowing try-catch-finally blocks and, 2nd, 3rd executable Java applications executable Java classes versus non-executable Java classes main method running Java program from command line expandCapacity( ) method experience property expert1 variable explainContents( ) method expressions extended classes extended interfaces extends keyword, 2^nd, 3^rd external reference

F

facebookId property FallInRiverException class false value, boolean variable fatal errors features and components of Java abstraction automatic memory management encapsulation inheritance multithreading and concurrency object orientation platform independence polymorphism security type safety File I/O file variable FileInputStream class, 2^nd, 3^rd FileNotFoundException, 2^nd, 3^rd, 4^th filter method final char array final interface final modifier final class final interface final method final variable overview, 2^nd final variables, 2^nd, 3^rd, 4^th finalize method float argument Float class, 2^nd float data type, 2^nd floating-point literals floating-point number floatValue( ) method flow control do-while, comparing with while loop do-while loop else blocks, missing if constructs, 2^nd if-else constructs for loop comparing with enhanced for loops comparing with while loop enhanced initialization block nested optional parts of for statement overview termination condition update clause loop constructs loop statements break statement, 2nd continue statement, 2nd labeled statements overview switch statement arguments passed to comparing with multiple if-else constructs creating label case of, values passed to overview using ternary constructs correct usage incorrect assignments incorrect usage nested overview while loop comparing with do-while loop comparing with for loop overview for block for loop comparing with enhanced for loops comparing with while loop enhanced Iteration with limitations of nested initialization block nested optional parts of for statement overview, 2^nd termination condition update clause format method, 2^nd format prefix FormatStyle value, 2^nd forward reference from prefix fully qualified names functional interfaces functional-style programming

G

garbage collection automatic memory management overview of referenced objects using System.gc( ) or Runtime.getRuntime( ).gc( ) when object is garbage collected get( ) method, 2^nd get prefix getAge method getAverage( ) method, 2^nd getDays( ) method getHour( ) method getMinute( ) method getMonths( ) method getName( ) method, 2^nd, 3^rd, 4^th getNano( ) method getSecond( ) method getter method getWeight method, 2^nd getXX( ) method, 2^nd getYears( ) method

H

HandleAndDeclare class handle-or-declare rule, 2^nd handling exceptions separately hashCode( ) method, 2^nd, 3^rd HashMap hasNext method HelloExam class hex value hexadecimal number system, 2^nd hexVal variable hiding class members Home class House class, 2^nd, 3^rd hr variable HRExecutive class, 2^nd, 3^rd, 4^th, 5^th, 6^th

I

IDE (Integrated Development Environment), 2^nd identifiers if block if constructs, 2^nd, 3^rd, 4^th if statements, 2^nd, 3^rd, 4^th, 5^th if-else constructs {} in multiple, comparing with switch statement overview, 2^nd if-else pairs if-else statement IllegalArgumentException, 2^nd immutable classes implemented interfaces implements keyword, 2^nd, 3^rd implicit widening, of data types in an arithmetic operation import statement, 2^nd, 3^rd import static statement incorrect statements increment( ) method increment operators indentation technique indexOf method, 2^nd, 3^rd, 4^th IndexOutOfBoundsException information hiding inheritance casting need for of variable to another type with classes abstract base class vs. concrete base class base class members inherited by/not inherited by derived class derived class containing object of its base class derived classes defining additional properties and behaviors extending classes, benefits of need to inherit classes interfaces class can’t extend multiple classes defining implementing single interface methods in, modifying methods in, types of multiple interfaces, extending multiple interfaces, implementing need for using overview properties of members of lambda expressions comparing passing values with passing code to methods Predicate interface syntax of overview, 2^nd, 3^rd polymorphism binding of variables and methods at compile time and runtime with classes with interfaces reference variables accessing objects using of derived class, using to access its own object of interface, using to access derived class object of superclass, using to access object of derived class super keyword accessing constructors of base class using accessing variables and methods of base class using overview using in static methods this keyword accessing constructors using accessing variables and methods using overview using in interfaces using in static methods inherited methods inheriting classes initialization blocks, vs. constructors initialization statements initializer block initializing arrays Ink class inner class inner loop, 2^nd inner parentheses insert( ) method, StringBuilder class instance attributes instance variables, 2^nd instanceof operator instanceVariable int argument, 2^nd int data type, 2^nd int type int value, 2^nd, 3^rd int variable, 2^nd, 3^rd intArray, 2^nd Integer class, 2^nd, 3^rd Integer variables integers Integrated Development Environment. See IDE. interface body interface keyword, 2^nd interface name interface type, arrays of interfaceArray interfaces defining methods in, modifying changing default method to abstract or static changing static method to default or abstract overview methods in, types of abstract methods default methods static methods multiple interfaces, extending overview with same abstract method names with same name default method names with same name static method names multiple interfaces, implementing with same abstract method names with same constant names with same default method names need for using overview, 2^nd properties of members of constants constructors methods single, implementing implementing abstract methods overriding default methods static methods Interviewer interface, 2^nd, 3^rd interviewer variable, 2^nd, 3^rd, 4^th inTransit( ) method intValue( ) method invalid combinations invalid identifiers IOException, 2^nd is prefix IS-A relationship isAfter( ) method, 2^nd isBefore( ) method, 2^nd isbn variable island of isolation, 2^nd isNegative method isPrime method issueCount variable issueHistory method isTested method isZero method iterators, 2^nd

J

Java, features and components of abstraction automatic memory management encapsulation inheritance multithreading and concurrency object orientation platform independence polymorphism security type safety Java Development Kit. See JDK. java HelloExam command Java Junior Associate certification. See 1Z0-811. java keyword Java reflection Java Runtime Environment. See JRE. java variable Java Virtual Machine. See JVM. JavaBeans Javadoc comments java.io.File class java.io.FileInputStream class java.io.FileNotFoundException java.io.FileOutputStream class java.io.IOException java.io.Serializable interface java.lang package, 2^nd, 3^rd java.lang.Comparable interface java.lang.Error class, 2^nd java.lang.Exception class, 2^nd java.lang.IndexOutOfBoundsException error java.lang.Number class java.lang.Object class, 2^nd, 3^rd, 4^th java.lang.RuntimeException class, 2^nd java.lang.Throwable class, 2^nd java.sql package java.time.format package java.util package, 2^nd java.util.Date instance JDK (Java Development Kit) JRE (Java Runtime Environment), 2^nd Jumpable interface, 2^nd JVM (Java Virtual Machine), 2^nd, 3^rd, 4^th

K

key-value pairs Kitchen class

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