Programming TIPS!

A site on Java API Examples and TIPS.

Java TIPS

Get the current time (October 11, 2023)
Use TimeUnit.sleep instead of Thread.sleep (July 1, 2023)
Simple Builder Design Pattern (July 1, 2023)
How to Use the Simple Web Server (jwebserver) (June 24, 2023)
Basics of Record class (June 10, 2023)
Delete a directory with contents (June 10, 2023)
Don't use the legacy File class, use new I/O APIs instead (June 3, 2023)
An exhaustive list of format strings (May 20, 2023)
Basics of Date and Time (May 13, 2023)
Don't use the legacy Date and Calendar classes, use new APIs instead (May 13, 2023)
Use System.nanoTime to measure elapsed time (May 13, 2023)

Index

@
- @FunctionalInterface (annotation) (September 29, 2023)
- @Override (annotation) (September 26, 2023)
- @SafeVarargs (annotation) (October 9, 2023)
- @SuppressWarnings (annotation) (October 18, 2023)
A
- AbstractCollection (February 10, 2024)
- AbstractInterruptibleChannel (July 31, 2023)
- AbstractList (February 10, 2024)
- AbstractMap (February 17, 2024)
- AbstractMap.SimpleEntry (November 23, 2023)
- AbstractMap.SimpleImmutableEntry (November 28, 2023)
- AbstractQueue (June 17, 2023)
- AbstractSequentialList (February 10, 2024)
- AbstractSet (February 17, 2024)
- AccessibleObject (July 8, 2023)
- Adler32 (July 22, 2023)
- AnnotatedElement (September 24, 2023)
- Appendable (February 11, 2024)
- ArithmeticException (May 27, 2023)
- ArrayBlockingQueue (June 30, 2023)
- ArrayDeque (February 25, 2024)
- ArrayIndexOutOfBoundsException (April 15, 2024) New!
- ArrayList (February 10, 2024)
- Arrays (April 8, 2023)
- ArrayStoreException (October 5, 2023)
- Attr (XML) (January 20, 2024)
- AutoCloseable (January 7, 2024)
B
- Base64 (December 10, 2023)
- Base64.Decoder (December 10, 2023)
- Base64.Encoder (December 10, 2023)
- BaseStream (February 14, 2024)
- BiConsumer (July 1, 2023)
- BiFunction (July 1, 2023)
- BigDecimal (December 31, 2023)
- BigInteger (December 31, 2023)
- BiPredicate (July 1, 2023)
- BlockingDeque (July 5, 2023)
- BlockingQueue (July 20, 2023)
- Boolean (February 25, 2024)
- Buffer (August 8, 2023)
- BufferedInputStream (July 15, 2023)
- BufferedOutputStream (July 15, 2023)
- BufferedReader (January 13, 2024)
- BufferedWriter (January 13, 2024)
- Byte (February 25, 2024)
- ByteArrayInputStream (January 13, 2024)
- ByteArrayOutputStream (July 8, 2023)
- ByteBuffer (August 21, 2023)
- ByteChannel (August 17, 2023)
C
- Calendar (September 20, 2023)
- Callable (January 27, 2024)
- CancellationException (May 31, 2023)
- Channel (July 20, 2023)
- Character (March 9, 2024)
- CharacterData (XML) (January 20, 2024)
- CharBuffer (December 13, 2023)
- CharSequence (December 10, 2023)
- Charset (January 5, 2023)
- Checksum (July 22, 2023)
- ChoiceFormat (November 25, 2022)
- ChronoLocalDate (November 9, 2023)
- Class (July 8, 2023)
- ClassCastException (May 27, 2023)
- ClassNotFoundException (March 13, 2024)
- Cleaner (July 1, 2023)
- Cleaner.Cleanable (January 18, 2024)
- Clock (October 11, 2023)
- Cloneable (January 20, 2024)
- CloneNotSupportedException (June 10, 2023)
- Closeable (January 13, 2024)
- Collection (February 3, 2024)
- Collections (December 24, 2023)
- Collectors (July 1, 2023)
- Comment (XML) (January 20, 2024)
- CompactNumberFormat (November 27, 2022)
- Comparable (December 24, 2023)
- Comparator (December 24, 2023)
- ConcurrentHashMap (June 17, 2023)
- ConcurrentHashMap.KeySetView (June 12, 2023)
- ConcurrentLinkedDeque (June 23, 2023)
- ConcurrentLinkedQueue (June 21, 2023)
- ConcurrentMap (June 2, 2023)
- ConcurrentModificationException (May 27, 2023)
- ConcurrentSkipListMap (June 17, 2023)
- ConcurrentSkipListSet (June 17, 2023)
- Condition (May 16, 2023)
- ConsoleHandler (logging) (December 31, 2023)
- Constructor (reflection) (July 8, 2023)
- Consumer (December 16, 2023)
- CopyOnWriteArrayList (May 25, 2023)
- CopyOnWriteArraySet (June 17, 2023)
- CountDownLatch (October 12, 2022)
- CRC32 (July 22, 2023)
- CRC32C (July 22, 2023)
- Currency (December 1, 2022)
- CyclicBarrier (April 26, 2023)
D
- DataInput (July 15, 2023)
- DataInputStream (July 15, 2023)
- DataOutput (July 15, 2023)
- DataOutputStream (July 15, 2023)
- Date (September 18, 2023)
- DateTimeException (May 27, 2023)
- DateTimeParseException (May 27, 2023)
- DayOfWeek (December 10, 2023)
- DecimalFormat (November 30, 2022)
- Deflater (ZIP) (February 14, 2023)
- DeflaterInputStream (ZIP) (July 15, 2023)
- DeflaterOutputStream (ZIP) (July 20, 2023)
- Deque (February 10, 2024)
- DirectoryNotEmptyException (July 15, 2023)
- Document (XML) (February 4, 2024)
- DocumentBuilder (XML) (January 20, 2024)
- DocumentBuilderFactory (XML) (January 20, 2024)
- DOMImplementation (XML) (February 4, 2024)
- DOMImplementationLS (XML) (February 4, 2024)
- Double (December 31, 2023)
- DoubleBuffer (August 25, 2023)
- DoubleConsumer (March 19, 2024)
- DoubleFunction (February 19, 2024)
- DoubleStream (February 21, 2024)
- Driver (JDBC) (December 30, 2022)
- Duration (December 10, 2023)
E
- Element (XML) (January 20, 2024)
- Entity (XML) (February 4, 2024)
- EntityReference (XML) (February 4, 2024)
- Enum (April 7, 2024)
- EnumMap (November 17, 2023)
- Era (October 26, 2023)
- Error (March 6, 2024)
- Exception (March 3, 2024)
- Exchanger (April 28, 2023)
- Executable (July 8, 2023)
- Executor (December 24, 2023)
- Executors (December 24, 2023)
- ExecutorService (December 24, 2023)
F
- Field (reflection) (July 8, 2023)
- File (September 7, 2023)
- FileAlreadyExistsException (May 27, 2023)
- FileChannel (October 3, 2023)
- FileHandler (logging) (December 31, 2023)
- FileLock (April 10, 2023)
- Files (January 13, 2024)
- FileStore (Storage) (December 8, 2022)
- FileSystemException (March 10, 2024)
- FileVisitor (July 22, 2023)
- FilterInputStream (July 15, 2023)
- FilterOutputStream (July 15, 2023)
- FilterReader (June 3, 2023)
- Float (March 9, 2024)
- FloatBuffer (August 30, 2023)
- Flow (Reactive Streams) (December 5, 2023)
- Flow.Processor (Reactive Streams) (December 15, 2023)
- Flow.Publisher (Reactive Streams) (April 14, 2024)
- Flow.Subscriber (Reactive Streams) (December 5, 2023)
- Flow.Subscription (Reactive Streams) (December 7, 2023)
- Flushable (July 13, 2023)
- Format (November 21, 2022)
- Formatter (logging) (December 31, 2023)
- Formatter (String Syntax) (December 6, 2022)
- Function (January 7, 2024)
- Future (December 24, 2023)
- Future.State (May 27, 2023)
- FutureTask (December 24, 2023)
G
- GatheringByteChannel (September 13, 2023)
- GZIPInputStream (ZIP) (July 15, 2023)
- GZIPOutputStream (ZIP) (July 15, 2023)
H
- Handler (logging) (December 24, 2023)
- HashMap (February 17, 2024)
- HashSet (February 17, 2024)
- HexFormat (July 8, 2023)
- HttpClient (March 31, 2024)
- HttpClient.Version (April 10, 2024)
- HttpHeaders (April 6, 2024)
- HttpRequest (April 4, 2024)
- HttpRequest.BodyPublisher (April 17, 2024) Update!
- HttpRequest.BodyPublishers (April 18, 2024) Update!
- HttpRequest.Builder (April 13, 2024)
- HttpResponse (April 4, 2024)

I
- IllegalAccessException (May 27, 2023)
- IllegalArgumentException (March 14, 2024)
- IllegalStateException (March 24, 2024)
- IndexOutOfBoundsException (March 27, 2024)
- Inflater (ZIP) (February 16, 2023)
- InflaterInputStream (ZIP) (July 15, 2023)
- InflaterOutputStream (ZIP) (July 15, 2023)
- InheritableThreadLocal (January 25, 2024)
- InputStream (January 13, 2024)
- InputStreamReader (July 15, 2023)
- Instant (October 7, 2023)
- InstantSource (October 13, 2023)
- IntBuffer (August 8, 2023)
- IntConsumer (February 27, 2024)
- Integer (December 31, 2023)
- InterruptedException (March 23, 2024)
- InterruptibleChannel (July 20, 2023)
- IntFunction (January 29, 2024)
- IntPredicate (March 25, 2024)
- IntStream (February 21, 2024)
- IOException (March 5, 2024)
- IsoEra (October 30, 2023)
- Iterable (January 30, 2024)
- Iterator (February 22, 2024)
J
- JapaneseDate (November 15, 2023)
- JapaneseEra (November 1, 2023)
- JShell (April 1, 2023)
L
- Level (logging) (December 24, 2023)
- LinkedBlockingDeque (July 11, 2023)
- LinkedBlockingQueue (July 6, 2023)
- LinkedHashMap (February 17, 2024)
- LinkedHashSet (February 17, 2024)
- LinkedList (February 17, 2024)
- List (January 31, 2024)
- ListIterator (February 24, 2024)
- LocalDate (October 7, 2023)
- LocalDateTime (October 7, 2023)
- Locale (November 21, 2022)
- LocalTime (October 7, 2023)
- Lock (May 10, 2023)
- Logger (logging) (December 24, 2023)
- LogManager (logging) (December 31, 2023)
- Long (March 9, 2024)
- LongBuffer (August 23, 2023)
- LongConsumer (March 16, 2024)
- LongFunction (February 12, 2024)
- LongPredicate (April 2, 2024)
- LongStream (February 21, 2024)
- LSSerializer (XML) (February 4, 2024)
M
- Map (December 24, 2023)
- Map.Entry (November 21, 2023)
- MappedByteBuffer (September 5, 2023)
- Matcher (regex) (February 4, 2024)
- MatchResult (regex) (February 4, 2024)
- Math (June 3, 2023)
- MathContext (December 31, 2023)
- Member (July 8, 2023)
- Method (reflection) (July 8, 2023)
- Month (December 10, 2023)
- MonthDay (October 24, 2023)
N
- NavigableMap (January 16, 2024)
- NavigableSet (January 10, 2024)
- Node (XML) (January 20, 2024)
- Normalizer (December 3, 2022)
- NoSuchElementException (February 8, 2024)
- NoSuchFieldException (May 27, 2023)
- NoSuchFileException (March 10, 2024)
- NoSuchMethodException (May 27, 2023)
- NullPointerException (March 14, 2024)
- Number (December 31, 2023)
- NumberFormat (November 27, 2022)
O
- Object (January 20, 2024)
- Objects (February 25, 2024)
- OffsetDateTime (January 7, 2024)
- OffsetTime (December 10, 2023)
- Optional (January 31, 2024)
- OptionalDouble (February 6, 2024)
- OptionalInt (January 31, 2024)
- OptionalLong (February 2, 2024)
- OutOfMemoryError (March 7, 2024)
- OutputStream (January 13, 2024)
- OutputStreamWriter (July 15, 2023)
P
- Path (January 28, 2024)
- Pattern (regex) (February 4, 2024)
- Period (October 7, 2023)
- PhantomReference (July 1, 2023)
- PipedReader (June 3, 2023)
- PipedWriter (June 3, 2023)
- Predicate (January 7, 2024)
- PrintStream (July 15, 2023)
- PrintWriter (June 3, 2023)
- PriorityBlockingQueue (July 27, 2023)
- PriorityQueue (July 24, 2023)
- Process (March 26, 2023)
- ProcessBuilder (May 20, 2023)
- ProcessBuilder.Redirect (March 9, 2023)
- ProcessHandle (March 26, 2023)
- ProcessHandle.Info (March 28, 2023)
- PushbackReader (June 3, 2023)
Q
- Queue (February 10, 2024)
R
- Random (January 13, 2024)
- RandomAccess (December 29, 2023)
- RandomGenerator (January 7, 2024)
- Readable (January 13, 2024)
- ReadableByteChannel (August 11, 2023)
- Reader (January 13, 2024)
- ReentrantLock (June 28, 2023)
- Reference (March 9, 2024)
- ReflectiveOperationException (March 12, 2024)
- RoundingMode (December 31, 2023)
- Runnable (December 16, 2023)
- Runtime (February 24, 2023)
- RuntimeException (March 3, 2024)
S
- Scanner (July 22, 2023)
- ScatteringByteChannel (September 11, 2023)
- SeekableByteChannel (September 1, 2023)
- Semaphore (May 13, 2023)
- SequencedCollection (December 21, 2023)
- SequencedMap (December 27, 2023)
- SequencedSet (December 25, 2023)
- Serializable (December 14, 2022)
- Set (February 8, 2024)
- Short (March 9, 2024)
- ShortBuffer (August 10, 2023)
- SimpleFileVisitor (July 22, 2023)
- SimpleFormatter (logging) (December 31, 2023)
- SoftReference (July 1, 2023)
- SortedMap (January 12, 2024)
- SortedSet (January 8, 2024)
- Spliterator (April 15, 2023)
- StackOverflowError (April 8, 2024)
- StackWalker (July 8, 2023)
- StandardCharsets (January 9, 2023)
- StandardCopyOption (File) (May 13, 2023)
- Stream (February 18, 2024)
- Stream.Builder (March 9, 2024)
- StreamHandler (logging) (December 31, 2023)
- StreamTokenizer (January 27, 2023)
- StrictMath (July 15, 2023)
- String (December 10, 2023)
- StringBuffer (December 10, 2023)
- StringBuilder (December 10, 2023)
- StringJoiner (February 25, 2024)
- StringReader (July 15, 2023)
- StringWriter (July 15, 2023)
- SubmissionPublisher (Reactive Streams) (December 19, 2023)
- Supplier (December 16, 2023)
- System (December 10, 2023)
T
- Temporal (November 7, 2023)
- TemporalAccessor (November 3, 2023)
- TemporalAdjuster (November 13, 2023)
- TemporalAdjusters (December 10, 2023)
- Text (XML) (February 4, 2024)
- Thread (December 24, 2023)
- ThreadGroup (January 24, 2024)
- ThreadLocal (January 22, 2024)
- Throwable (March 2, 2024)
- TimeUnit (July 1, 2023)
- TimeZone (September 22, 2023)
- Transformer (XML) (February 4, 2024)
- TransformerFactory (XML) (January 20, 2024)
- TreeMap (February 17, 2024)
- TreeSet (February 25, 2024)
U
- UnsupportedOperationException (January 13, 2024)
- URI (April 20, 2024) Update!
- URL (January 7, 2024)
- UUID (January 7, 2024)
W
- WeakHashMap (March 9, 2024)
- WeakReference (March 9, 2024)
- WritableByteChannel (August 14, 2023)
- Writer (January 13, 2024)
X
- XMLFormatter (logging) (December 31, 2023)
Y
- Year (October 7, 2023)
- YearMonth (November 2, 2023)
Z
- ZipEntry (February 20, 2023)
- ZipFile (February 22, 2023)
- ZipInputStream (July 15, 2023)
- ZipOutputStream (July 15, 2023)
- ZonedDateTime (October 7, 2023)
- ZoneId (October 7, 2023)
- ZoneOffset (October 7, 2023)

Programming TIPS!

Java TIPS

Category

Annotation

Base

Buffer

Channel

Checksum

Collection

Database(JDBC)

Design

Exception

File

Functional Interface

Internationalization

IO

Logging

Network

Number

Optional

Process

Random

Reactive Streams

Reference

Reflection

Regex

Stream

String

Thread

Time

Tool

Utility

XML

ZIP

Index