Java Programming for absolute beginner- P28 docx

Label class, 183–185 labels, 175

layout managers BorderLayout, 227–229 CardLayout, 238–242 FlowLayout, 223–226 GridBagLayout, 229–236 GridLayout, 225–228 overview, 223 lightweight components, 431 creating, 432–433 jpr.lightweight package, creating documentation for, 450–453 JPRButton3D class, 447–451 JPRButton3D class, testing, 451–454 JPRComponent3D class, source code, 437–443, 447–448

JPRRectComponent3D class, 444–447 lines, drawing, 315–316

Linux, installing SDK on, 10–11 List component (AWT), 176, 195–198 list() method, 124

literals case sensitivity, 28–29 character escape codes, 29–31 defined, 28–29

local variables, 126–127 logical compliment operators, 69–70 loops

arrays, looping on, 104–106 break statement, 112–116 defined, 94–96

do, 109–111 endless, 112 exception handling, 115–117 infinite, 112

for loop, 96 counting backwards, 101–103 nested, 102–105

Racer program example code, 95–96 skipping values, 98–99

while, 108–110

M

MadLib game, 172–173 AdvancedMadLip application, creating, 271–275

game frame, creating, 217–219 MadDialog component, creating, 214–218 MadInputPanel class, creating, 268–272 main() method

command-line arguments and, 46–47 function of, 19

Math class, 57 methods, list of, 63 mathematical operations See also numbers, 37

counting backwards, 101–103 floating point math, list of, 37 integer math, list of, 37 modulus operators, 35–36 operator precedence, 37 percentages, 34–35 Math.random() method, 58 Menu component (AWT), 203–207 method access modifiers, 144–145 methods

block statements, 16 BoderLayout(), 228–229 boolean isEnabled(), 173–174 boolean isFocusTraversable(), 173–174 boolean isLightWeigth(), 173–174 brighter(), 337–338

buttons, list of, 184–187 CodeBase(), 302–303 constructor, 140–142 createStory(), 272–273 darker(), 337–338 declaring, 136–137

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defined, 16 defining, 132–136 destroy(), 290–292 dispose(), 181–182, 244 drawImage(), 332–333 drive(), 435–436 getAppletInfo(), 281, 285–286 getBackgound(), 173–174 getBounds(), 173–174 getFont(), 173–174 getFontMetrics(), 327–328 getHeight(), 173–174, 334–335 getID(), 455

getImage(), 333–334 getInteriorSize(), 447–448 getItem(), 257–258 getKeyCode(), 267 getParameter(), 284–285 getParameterInfo(), 285–286 getPreferredSize(), 173–174 getSize(), 173–174

getSource(), 244, 465–466 getStateChange(), 257–258 getStringArray(), 268–269 getUserInput(), 167 getWidth(), 173–174, 334–335 getX(), 173–174

getY(), 173–174 GridLayout(), 227–228 init(), 280, 290–292 Integer.parseInt(), 44–45 interrupt(), 361–362 list(), 124

main() command-line arguments and, 46–47 function of, 19

Math Class, 63 Math.random(), 58 method overloading, 138–140 method signature, 136

next(), 268–269 notify(), 361–362 notifyAll(), 361–362 overriding, 157–158 paint(), 23

passing parameters, 136–139 play(), 167, 370

previous(), 268–269 randomize(), 348–349 readParams(), 309 repaint(), 344–345 reset(), 152, 158–159 revealAll(), 468–469 rotateClockwise(), 380 rotateCounterClockwise(), 380 run(), 356, 358

setColor(), 136 setFont(), 326–327 setSeed(), 61 shuffle(), 158–159 start(), 290–292, 356 static methods, 140–141 stop(), 290–292

toString(), 157–158 update(), 363–364 values, returning, 139–140 wait(), 361–362

Mine Cell MineCell class importing, 456–457 MineCell.java, source code listing, 458–462

MouseEvent pass, 457–458 testing, 462–463

MineCellEvent class, 455–456 MineCellListener interface, 456 MineField class

checkIfSolved() method, 469 getSource() method, 465–466 members, declaring, 465–466

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MineCell.EMPTY, source code, 467–468

MineField java, source code listing, 470–474

randomizeField() method, 466–467 revealAll() method, 468–469 MineFieldEvent class, 464–465 MineFieldListener interface, 464–465 MinePatrol application, source code listing, 474–476

modifiers, access modifiers, 144–145 modulus operators, 35–37

MouseEvents class, 261–265 multi-line comments, 18 multidimensional arrays, 87–89 multiplication operator (*), 37

N

naming variables, 31–32 nested classes, 398–399 nested if-else statements, 77–79 nested loops, 102–105

next() method, 268–269 notify() method, 361–362 notifyAll() method, 361–362 numbers See also mathematical operations floating-point, 34–35

operator precedence, 37 parsing strings to, 44–45 random numbers AmIRandom program, 59–60 DiceRoller application example, 65–67

double, assigning, 57–58 even numbers only, 66–68

if statement, 66–68 MakerUtil application example, 58–59 Math Class method, list of, 63 MathClassTest application example, 62–64

Math.random() method, 58 methods, list of, 58 NumberMaker application sample, 57 pseudorandom numbers, 59–60 setSeed() method, 61

values, getting larger than 1, 65 values, skipping, 98–99

numerical comparison operators, 68–69

O

object-oriented programming (OOP) encapsulation, 146–148

inheritance, 154 polymorphism, 157–158 OOP See object-oriented programming operators

boolean logical, 70–72 conditional, 68–69 increment, 96–97 compound assignment, 99–100 postfix, 96–97

prefix, 96–97 integer bitwise, 71–72 logical compliment, 69–70 numerical comparison, 68–69 operator precedence, 37 ternary, 72–73

outer classes, 398–399 ovals, drawing, 321–322 overriding methods, 157–158

P

packages declaring, 434–435 defined, 40 paint() method, 23 Panel component (AWT), 208–209 parameters, passing parameters, 136–139 parsing strings to numbers, 44–45

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passing parameters, 136–139 pausing threads, 361–362 percentages, calculating, 34–35 platform independence, 4–5 play() method, 167, 370 polygons, drawing, 323–326 polymorphism, 157–158 PopupMenu component (AWT), 206–208 postfix increment operators, 96–97 prefix increment operators, 96–97 previous() method, 268–269 Prima Tech Web site, 477 primitive data types, 27 printing status messages, 293 private variables, 144–145 procedure-oriented program, 5 programming languages, 4 programs

defined, 4 examples of See example codes procedure-oriented, 5

protected keyword, 144–145 pseudorandom numbers, 59–60 public keyword, 16

R

random numbers AmIRandom program, 59–60 DiceRoller application example, 65–67 double, assigning, 57–58

even numbers only, 66–68

if statement, 66–68 Math Class method, list of, 63 MathClassTest application example, 64 Math.random() method, 58

NumberMaker application source code sample, 57

pseudorandom numbers, 59–60

Random class MakerUtil application, source code example, 58–59

methods, list of, 58 setSeed() method, 61 values, getting larger than 1, 65 randomize() method, 348–349 readParams() method, 309 rectangles, drawing, 317–320 repaint() method, 344–345 reset() method, 152, 158–159 returning values, 139–140 revealAll() method, 468–469 rotateClockwise() method, 380 rotateCounterClockwise() method, 380 run() method, 356, 358

S

sample codes See also example codes Hello, World application sample compiling, 12–14

running, 14–15 source code, 12–13 HelloWeb applet, 2–3 NumberMaker application, source code, 57

Scrollbar component (AWT), 176, 209–213 security

applets, 290–291 thread-safe code, 360–361 sentinel values, 101

setColor() method, 136 setFont() method, 326–327 setSeed() method, 61 shuffle() method, 158–159 single-line comments, 18 skipping values, 98–99 Solaris, installing SDK on, 10

501

sound files applets and, 302–304 playing from applications, 369–370 SoundApplication, source code, 369–370 source code See example codes

Sprite class overview, 363–364 testing, 365–367 start() method, 290–292, 356 statements

block statements, 16, 67–68 break statement, loops and, 112–116 conditional statements, 66–67 if-else, 74, 75–76

flowchart, 74–75 indentation, 80–81 ManyTemps program example, 79–80 syntax convention, 80–81

import, 22 switch, 80–82 case values, 82 compile-time errors, 82 FuzzyDice program example, 83–84 static methods, 140–141

static variables, 127–129 status messages, printing, 293 stop() method, 290–292 strings

concatenation, 48–49 defined, 48

drawing, 325–327 index of, 48–49 methods, list of, 49–50 parsing to numbers, 44–45 String class, 48

String objects, 48–49 substrings, 48 subclasses, 22 subtraction operator (-), 37

super classes, 22 switch statement, 80–82 case values, 82 compile-time errors, 82 FuzzyDice program example, 83–84 synchronized keyword, 360–361 syntax, 15

T

tags, javadoc, 436–437 ternary operators, 72–73 TextArea component (AWT), 176, 190–191, 192–193

TextEvents class, 260–262 TextField (AWT), 176 TextField class, 186–191 this keyword, 143 threads

creating using Runnable interface, 358–359 using Thread class, 356–357 defined, 354

interrupt() method, 361–362 multithreading, problems associated with, 358–361

notify() method, 361–362 notifyall() method, 361–362 output, order of, 355 pausing, 361–362 thread-safe code, 360–361 wait() method, 361–362 toString() method, 157–158 try-catch block, exception handling and, 116–117

U

underscore (_), 31 Unicode, 27 update() method, 363–364

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user input BufferedReader class, 40–42 example code, 38–39 InputStreamReader class, 40

V

values assigning

to arrays, 85–88

to variables, 31–34 returning, 139–140 sentinel, 101 variables assigning values to, 31–34 class, 126–127

declaring, 31–32 defined, 26–27 instance, 126–127 local, 126–127 naming, 31–32 private, 144–145 static, 127–129 Vector class, 160–163

W

wait() method, 361–362 Web pages, including applets in, 282–284 applet HTML tag, 284–285

passing parameters to applets, 284–288 security restrictions, 290–291

using frames with, 288–290 while loop, 108–110

WindowListener interface, 242–245 Windows Update Web site, 279 Windows (Win32) installation, installing SDK on, 8–10

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