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Java Tutorial

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Java Data Types

Data Types Numbers Booleans Characters Real-Life Example Non-primitive Types The var Keyword Code Challenge

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Booleans Real-Life Example Code Challenge

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While Loop Do/While Loop Real-Life Examples Code Challenge

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assert abstract boolean break byte case catch char class continue const default do double else enum exports extends final finally float for goto if implements import instanceof int interface long module native new package private protected public return requires short static strictfp super switch synchronized this throw throws transient try var void volatile while

ArrayList Methods

add() addAll() clear() clone() contains ensureCapacity() forEach() get() indexOf() isEmpty() iterator() lastIndexOf() listIterator() remove() removeAll() removeIf() replaceAll() retainAll() set() size() sort() spliterator() subList() toArray() trimToSize()

compare() copyOf() deepEquals() equals() sort() fill() mismatch() length

close() mark() markSupported() read() readLine() ready() reset() skip() lines() transferTo()

close() flush() newLine() write() append()

Character Methods

compare() getNumericValue() isAlphabetic() isDigit() isLetter() isLetterOrDigit() isLowerCase() isUpperCase() isWhitespace() toLowerCase() toString() toUpperCase() valueOf()

Collections Methods

sort() binarySearch() reverse() reverseOrder() shuffle() swap() frequency() max() min() disjoint() copy() fill() replaceAll() unmodifiableList() unmodifiableSet() unmodifiableMap()

Comparator Methods

compare() comparing() comparingInt() naturalOrder() reversed() reverseOrder() thenComparing() compareTo()

now() of() parse() getYear() getMonthValue() getMonth() getDayOfMonth() getDayOfWeek() plusDays() minusDays() plusMonths() plusYears() isBefore() isAfter() isLeapYear() lengthOfMonth() format() now() of() getHour() getMinute() plusHours() plusMinutes() now() of() toLocalDate() toLocalTime() format() ofPattern() format()

compareTo() name() ordinal() toString() valueOf() values()

Errors & Exceptions

ArithmeticException ArrayIndexOutOfBoundsException ClassFormatError ClassNotFoundException ConcurrentModificationException FileNotFoundException IncompatibleClassChangeError InputMismatchException InterruptedException InvalidClassException IOException NegativeArraySizeException NoClassDefFoundError NoSuchFieldException NoSuchMethodException NullPointerException NumberFormatException RuntimeException StringIndexOutOfBoundsException TypeNotPresentException IllegalArgumentException IllegalStateException

createNewFile() delete() exists() canRead() canWrite() isFile() isDirectory() length() getName() getAbsolutePath() getPath() getParent() list() listFiles() mkdir() mkdirs() renameTo() setReadOnly() setWritable() setReadable() setExecutable() canExecute()

FileInputStream

available() close() read() skip() getFD() getChannel()

FileOutputStream

close() flush() write() getFD() getChannel()

read() ready() skip() close() mark() reset() markSupported() getEncoding() transferTo()

write() append() flush() close() getEncoding()

HashMap Methods

clear() clone() compute() computeIfAbsent() computeIfPresent() containsKey() containsValue() entrySet() forEach() get() getOrDefault() isEmpty() keySet() merge() put() putAll() putIfAbsent() remove() replace() replaceAll() size() values()

HashSet Methods

add() addAll() clear() clone() contains() isEmpty() iterator() remove() removeAll() size() spliterator() toArray()

Integer Methods

compare() compareTo() equals() intValue() max() min() parseInt() sum() toBinaryString() toHexString() toOctalString() toString() valueOf() MAX_VALUE MIN_VALUE

Iterator Methods

hasNext() next() remove()

LinkedHashMap Methods

clear() clone() compute() computeIfAbsent() computeIfPresent() containsKey() containsValue() entrySet() forEach() get() getOrDefault() isEmpty() keySet() merge() put() putAll() putIfAbsent() remove() replace() replaceAll() size() values()

LinkedHashSet Methods

add() addAll() clear() clone() contains() isEmpty() iterator() remove() removeAll() size() spliterator() toArray()

LinkedList Methods

add() addAll() addFirst() addLast() clear() clone() contains descendingIterator() element() forEach() get() getFirst() getLast() indexOf() isEmpty() iterator() lastIndexOf() listIterator() offer() offerFirst() offerLast() peek() peekFirst() peekLast() poll() pollFirst() pollLast() pop() push() remove() removeAll() removeFirst() removeFirstOccurrence() removeIf() removeLast() removeLastOccurrence() replaceAll() retainAll() set() size() sort() spliterator() subList() toArray()

abs() acos() addExact() asin() atan() atan2() cbrt() ceil() copySign() cos() cosh() decrementExact() exp() expm1() floor() floorDiv() floorMod() getExponent() hypot() IEEEremainder() incrementExact() log() log10() log1p() max() min() multiplyExact() negateExact() nextAfter() nextDown() nextUp() pow() random() rint() round() scalb() signum() sin() sinh() sqrt() subtractExact() tan() tanh() toDegrees() toIntExact() toRadians() ulp()

Optional Methods

empty() filter() flatMap() get() ifPresent() isPresent() map() of() ofNullable() orElse() orElseGet() orElseThrow()

print() printf() println()

ints() nextBoolean() nextDouble() nextFloat() nextGaussian() nextInt() nextLong() setSeed()

compile() flags() matcher() matches() pattern() quote() split() end() find() group() groupCount() lookingAt() matches() replaceAll() replaceFirst() reset() start()

Scanner Methods

close() delimiter() findInLine() findWithinHorizon() hasNext() hasNextBoolean() hasNextByte() hasNextDouble() hasNextFloat() hasNextInt() hasNextLine() hasNextLong() hasNextShort() locale() next() nextBoolean() nextByte() nextDouble() nextFloat() nextInt() nextLine() nextLong() nextShort() radix() reset() useDelimiter() useLocale() useRadix()

charAt() codePointAt() codePointBefore() codePointCount() compareTo() compareToIgnoreCase() concat() contains() contentEquals() copyValueOf() endsWith() equals() equalsIgnoreCase() format() getBytes() getChars() hashCode() indexOf() intern() isEmpty() join() lastIndexOf() length() matches() offsetByCodePoints() regionMatches() replace() replaceAll() replaceFirst() split() startsWith() subSequence() substring() toCharArray() toLowerCase() toString() toUpperCase() trim() valueOf()

StringBuilder Methods

append() appendCodePoint() capacity() charAt() codePointAt() codePointBefore() codePointCount() delete() deleteCharAt() ensureCapacity() getChars() indexOf() insert() lastIndexOf() length() offsetByCodePoints() replace() reverse() setCharAt() setLength() subSequence() substring() toString() trimToSize()

currentTimeMillis() nanoTime() exit() gc() getProperty() getProperties() setProperty() clearProperty() arraycopy() identityHashCode() lineSeparator() getenv() in out err

currentThread() getName() getPriority() interrupt() isAlive() isInterrupted() join() run() setName() setPriority() sleep() start()

TreeMap Methods

firstKey() lastKey() firstEntry() lastEntry() floorKey() ceilingKey() lowerKey() higherKey() headMap() tailMap() subMap() pollFirstEntry() pollLastEntry() descendingMap() clear() clone() compute() computeIfAbsent() computeIfPresent() containsKey() containsValue() entrySet() forEach() get() getOrDefault() isEmpty() keySet() merge() put() putAll() putIfAbsent() remove() replace() replaceAll() size() values()

TreeSet Methods

first() last() floor() ceiling() lower() higher() headSet() tailSet() subSet() pollFirst() pollLast() descendingSet() add() addAll() clear() clone() contains() isEmpty() iterator() remove() removeAll() size() spliterator() toArray()

Java Data Types Code Challenge

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Challenge: Create a Student Report Card

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