java源码阅读顺序

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接下来会进行 jdk 源码的阅读，此文作为阅读源码的顺序参考

很多java开发的小伙伴都会阅读jdk源码，然而确不知道应该从哪读起。以下为小编整理的通常所需阅读的源码范围。
标题为包名，后面序号为优先级1-4，优先级递减
一、java.lang

  1. Object 1
  2. String 1
  3. AbstractStringBuilder 1
  4. StringBuffer 1
  5. StringBuilder 1
  6. Boolean 2
  7. Byte 2
  8. Double 2
  9. Float 2
  10. Integer 2
  11. Long 2
  12. Short 2
  13. Thread 2
  14. ThreadLocal 2
  15. Enum 3
  16. Throwable 3
  17. Error 3
  18. Exception 3
  19. Class 4
  20. ClassLoader 4
  21. Compiler 4
  22. System 4
  23. Package 4
  24. Void 4

二、java.util

  1. AbstractList 1
  2. AbstractMap 1
  3. AbstractSet 1
  4. ArrayList 1
  5. LinkedList 1
  6. HashMap 1
  7. Hashtable 1
  8. HashSet 1
  9. LinkedHashMap 1
  10. LinkedHashSet 1
  11. TreeMap 1
  12. TreeSet 1
  13. Vector 2
  14. Queue 2
  15. Stack 2
  16. SortedMap 2
  17. SortedSet 2
  18. Collections 3
  19. Arrays 3
  20. Comparator 3
  21. Iterator 3
  22. Base64 4
  23. Date 4
  24. EventListener 4
  25. Random 4
  26. SubList 4
  27. Timer 4
  28. UUID 4
  29. WeakHashMap 4

三、java.util.concurrent

  1. ConcurrentHashMap 1
  2. Executor 2
  3. AbstractExecutorService 2
  4. ExecutorService 2
  5. ThreadPoolExecutor 2
  6. BlockingQueue 2
  7. AbstractQueuedSynchronizer 2
  8. CountDownLatch 2
  9. FutureTask 2
  10. Semaphore 2
  11. CyclicBarrier 2
  12. CopyOnWriteArrayList 3
  13. SynchronousQueue 3
  14. BlockingDeque 3
  15. Callable 4

四、java.util.concurrent.atomic

  1. AtomicBoolean 2
  2. AtomicInteger 2
  3. AtomicLong 2
  4. AtomicReference 3

五、java.lang.reflect

  1. Field 2
  2. Method 2

六、java.lang.annotation

  1. Annotation 3
  2. Target 3
  3. Inherited 3
  4. Retention 3
  5. Documented 4
  6. ElementType 4
  7. Native 4
  8. Repeatable 4

七、java.util.concurrent.locks

  1. Lock 2
  2. Condition 2
  3. ReentrantLock 2
  4. ReentrantReadWriteLock 2

八、java.io

  1. File 3
  2. InputStream 3
  3. OutputStream 3
  4. Reader 4
  5. Writer 4

九、java.nio

  1. Buffer 3
  2. ByteBuffer 4
  3. CharBuffer 4
  4. DoubleBuffer 4
  5. FloatBuffer 4
  6. IntBuffer 4
  7. LongBuffer 4
  8. ShortBuffer 4

十、java.sql

  1. Connection 3
  2. Driver 3
  3. DriverManager 3
  4. JDBCType 3
  5. ResultSet 4
  6. Statement 4

十一、java.net

  1. Socket 3
  2. ServerSocket 3
  3. URI 4
  4. URL 4
  5. URLEncoder 4