Java core tutorial

This series of blog describes mainly how to use common classes of JDK.

java.io

• Java delete file example
• Java serialization when object changed
• Java large file line by line read example

java.lang

• Java execute command example
• Java execute command get output example
• Java finally example
• Java isAssignableFrom example
• Java stringbuilder remove last character
• Java understand NoClassDefFoundError
• Java wait notify consumer producer example
• Java Thread join example
• Java Thread state example
• Java dynamic proxy example
• Java create deadlock example
• Java clone example
• Java understand daemon thread
• Java understand IncompatibleClassChangeError
• Java stack trace disappear
• Java could not find or load main class

java.math

• Java BigDecimal example

java.util

• How ArrayList increase
• Java blockingqueue producer consumer example
• Java comparable and comparator example
• Java CountDownLatch example
• Java CyclicBarrier example
• Java future callable example
• Java get element in set
• Java ReentrantLock example
• Java remove all null elements from list
• Java Semaphore example
• Java ThreadPoolExecutor example
• Java8 convert list to map
• Java8 stream map example
• Java8 stream flatMap example
• Java8 stream reduce example
• Java8 stream collect list to map in order
• Java8 stream groupingBy example
• Java8 add log in stream
• Java8 Collectors.partitioningBy example
• Java8 Collectors.mapping example
• Understand ThreadPoolExecutor core and maximum
• Java Executors newCachedThreadPool example
• Java Executors newFixedThreadPool example
• Java ThreadLocalRandom example
• Java read write lock example
• Java retainAll example
• Java CopyOnWriteArrayList example
• Java ForkJoinPool example
• Java determine thread pool size
• Java convert list to array
• Java8 CompletableFuture example
• Java8 CompletableFuture concurrence example
• Java8 CompletableFuture runAsync allof example
• Java8 understand stream filter

java.net

• Java URL decode encode example
• Java get local address example

java.time

• Java8 calculate time difference milliseconds
• Java8 parse string to LocalDateTime
• Java8 convert LocalDateTime to Date

java.security

• Java RSA encrypt decrypt example

misc

• Java initializing fields order
• Java initializing order with static inner class
• Java bitwise example
• Java 3 threads print in sequence