JAVA知识 - 随笔分类 - Hygeia

摘要：先来个图：引自： https://www.geeksforgeeks.org/deque-interface-java-example/ 阅读全文

posted @ 2018-10-08 11:21 Hygeia 阅读(137) 评论(0) 推荐(0)

摘要：http://www.java2s.com/Tutorials/Java/Java_Language/Basic/Java_double_type.htm 阅读全文

posted @ 2016-07-25 12:32 Hygeia 阅读(232) 评论(0) 推荐(0)

摘要：java中的数据类型，可分为两类： 1.基本数据类型，也称原始数据类型。byte,short,char,int,long,float,double,boolean 他们之间的比较，应用双等号（==）,比较的是他们的值。 2.复合数据类型(类) 当他们用（==）进行比较的时候，比较的是他们在内存中的存阅读全文

posted @ 2016-06-29 04:35 Hygeia 阅读(455) 评论(0) 推荐(0)

两种方法写singleton

摘要：第一种形式是 publicclassSingleton{ privateSingleton(){} privatestaticfinalSingletoninstance=newSingleton(); publicstaticSingletonget... 阅读全文

posted @ 2016-01-27 13:01 Hygeia 阅读(416) 评论(0) 推荐(0)

Priority Queue Implementation

摘要：In Java, thePriorityQueueclass is implemented as a priority heap. Heap is an important data structure in computer science. For a quick overview of hea... 阅读全文

posted @ 2016-01-26 00:38 Hygeia 阅读(309) 评论(0) 推荐(0)

Hashcode Of A String In Java

摘要：Many of the Java programmers know what 'Hashcode' means, but don't really know how exactly it is calculated and why 31 is used to calculate the hashco... 阅读全文

posted @ 2016-01-22 02:41 Hygeia 阅读(211) 评论(0) 推荐(0)

How java implements HashMap

摘要：1.How java implements HashMapHashMap Custom implementation in java - How HashMap works internally with diagrams and full programhttp://www.javamadesoe... 阅读全文

posted @ 2016-01-22 02:00 Hygeia 阅读(248) 评论(0) 推荐(0)

Java排序: Comparator vs Comparable 入门

摘要：reference:http://fuxueliang.com/tech/2013/05/26/java-sorting-comparator-vs-comparable-tutorial/ 阅读全文

posted @ 2016-01-22 00:51 Hygeia 阅读(152) 评论(0) 推荐(0)

树的遍历

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posted @ 2016-01-06 03:31 Hygeia 阅读(16) 评论(0) 推荐(0)

Reverse an ArrayList

摘要：public ArrayList reverse(ArrayList list) { for(int i = 0, j = list.size() - 1; i < j; i++) { list.add(i, list.remove(j)); ... 阅读全文

posted @ 2015-12-31 05:51 Hygeia 阅读(187) 评论(0) 推荐(0)

Java LinkedList - differences between retrieve operations

摘要：Returning null + removing operations:poll(),pollFirst().Returning null + not removing operations:peek(),peekFirst().Throwing exception + removing oper... 阅读全文

posted @ 2015-12-30 06:26 Hygeia 阅读(140) 评论(0) 推荐(0)

ReentrantLock

摘要：ReentrantLock:http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/locks/ReentrantLock.html#lockInterruptibly()publicvoidlockInterruptibly() ... 阅读全文

posted @ 2015-10-02 09:57 Hygeia 阅读(155) 评论(0) 推荐(0)

Lock and Thread in JAVA

摘要：http://lavasoft.blog.51cto.com/62575/991551. What is Mutex andSemaphore?Mutex(mutual exclusion):mutual exclusionrefers to the requirement of ensuring ... 阅读全文

posted @ 2015-10-02 09:57 Hygeia 阅读(102) 评论(0) 推荐(0)

Intrinsic lock & synchronization

摘要：http://www.cnblogs.com/ukouryou/articles/4079638.html 阅读全文

posted @ 2015-10-02 06:34 Hygeia 阅读(159) 评论(0) 推荐(0)

Reverse的方法

摘要：方法一： reverse ArrayList1 private void reverse(ArrayList nums, int start, int end) {2 for (int i = start, j = end; i < j; i++, j--) {3 ... 阅读全文

posted @ 2015-09-25 01:04 Hygeia 阅读(165) 评论(0) 推荐(0)

ArrayList与List接口如何理解

摘要：正确的写法：public static List> function(){ List> list = new ArrayList>(); return list; }错误写法1：public static List> function(){ List>... 阅读全文

posted @ 2015-08-05 05:44 Hygeia 阅读(1627) 评论(0) 推荐(0)

Java 位操作

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posted @ 2015-07-27 11:01 Hygeia 阅读(9) 评论(0) 推荐(0)

[未完待续]Boundary Condition of Binary Search

摘要：reference： http://www.eecs.yorku.ca/course_archive/2013-14/W/2011/lectures/09%20Loop%20Invariants%20and%20Binary%20Search.pdf 阅读全文

posted @ 2015-07-14 17:31 Hygeia 阅读(118) 评论(0) 推荐(0)

Why am I getting an Unreachable Statement error in Java?

摘要：1 import java.util.*; 2 import java.io.*; 3 import java.nio.file.*; 4 import java.lang.StringBuilder; 5 6 class FilePrep { 7 public static void ... 阅读全文

posted @ 2015-07-05 13:02 Hygeia 阅读(292) 评论(0) 推荐(0)

List总结(LinkedList, ArrayList等使用场景和性能分析) [From skywang12345 ]

摘要：Reference: http://www.cnblogs.com/skywang12345/p/3308900.html 阅读全文

posted @ 2015-06-05 06:54 Hygeia 阅读(254) 评论(0) 推荐(0)

Hygeia

随笔分类 - JAVA知识

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