best java introduction book

infrequently used removal. Linkedhashmap API written very clearly, recommend you can read it first. To implement the LRU cache based on Linkedhashmap, we can choose inheritance or delegation, I prefer delegation. Based on the implementation of delegation has been written, and written very beautiful, I will not swim. The code is as follows: packagelru;importjava.util.linkedhashmap;importjava.util.collection;import java.util.map;importjava.util.arraylist;/***anlrucache,basedon code derived from:

information is defined by a constructor function. Cases:extends exception{ demoexception (String message) { Super(message);} }throws a custom exception by throw. RuntimeException and its subclasses can be thrown out of a function without being declared on the function. 1. The parent's method throws an exception, and the child's overriding method must be less than or equal to the parent's exception when throwing the exception, that is, the subclass that must throw the same exception or excep

structure and content of the design pattern, so I should use actual examples to help me understand the design patterns. If you go back and read a book again, there will be a lot of questions, the feeling of another village. (Not even applause)In Java, the design patterns is everywhere. JDK is a typical application of the design pattern. The commonly used AWT includes abstractfactory, composite, bridge, str

-XX:+DisableExplicitGC suppress the explicit triggering of GC by:.Summary When there is only one available CPU, it is more appropriate to use a serial collector. Because the other GC will start multiple threads. Note When using a different JVM version and OS version, the default GC is the serial and throughput recycler, and the JVM Flags are required to use the CMS or G1. CMS and G1 require additional CPU resources to run background threads that periodically recycle old generat

reception phenomenon ).Manipulating UDP in Java uses the Datagramsocket and Datagrampacket classes that are located under the java.net package in the JDK, making it very easy to control user data packets for UDP program development.Use the Datagrampacket class in UDP development to wrap a message that needs to be sent, and then use the Datagramsocket class to complete the send operation of the information.A complete UDP network development program co

Reference book: "Java EE open source programming Essentials 15"Hibernate is the solution for object/relational mapping (Orm,object/relational Mapping), which is to map Java objects and object relationships to the relationships between tables and tables in a relational database. It is a bridge between Java applications

These years free to help classmates or classmates friend did the bi set or some, my blog is basically based on the project I have done related, and there are one-third of them are doing the completion of their own or others after the completion of the feeling. The completion of this includes MFC image processing,. NET security software, C # chat software dictionary software, Android Baidu map Handy shot, PHP website. NET book management system and so

. For the sake of unification, and in line with the official document of the Java language Specification , this book finds that the private domain of the parent class is not inherited.However, this does not change the fact that the child class object created contains a parent class object. From the memory allocation of an object, the subclass object includes both the parent class definition instance variabl

determined by the type of project, for example, if the type of the project is the Jar,package stage, Jar:jar goals will be executed by default. If the project type is war, then the goals of the package phase will be war:war.One interesting thing to note is that phases and goals need to be executed in a certain order.MVN Clean Dependency:copy-dependencies PackageThis command clears the project first, then copies the dependencies, finally packages the project, and, of course, executes the previou

This article completely copies the contents of the Introduction to Programming (Java) 3.2.4 Loop statement. In addition to the description text in the. Please read and compare other programming materials.I know. Suppose I am a person who has just started to learn,"Introduction to Programming (Java)" is very unsuitable

community members exceeded 100,000February 1998, JDK1.1 was downloaded more than 2,000,000 timesDecember 8, 1998, JAVA2 Enterprise platform Java cloud releaseIn June 1999, Sun released three versions of Java: Standard Edition (Javase, formerly J2SE), Enterprise Edition (Java EE was formerly a Java EE), and mini-versio

Introduction to the Java language1.Java 's HistoryI personally think that learning a technology, not only to focus on the technology itself, but also to understand the history of its development, this aspect is the technology itself respect, on the other hand, but also hope that the development of the technology in the past to speculate on its possible future dev

program | design | Download title Introduction to Java Mobile phone design ebook Open DownloadMoli (original) keyword phone Java Hand program design into the door to download Hello everyone, recently a reader came to me and said that he could not buy one of my books: Java Hand Program design into the gate/August 2001

]-3thread[thread-1,10,main]-4thread[thread-1,10,main]-5thread[thread-1,10,main]-6thread[thread-0,5,main]-0Thread[thread-1,10,main]-7Thread[thread-1,10,main]-8Thread[thread-0,5,main]-1Thread[thread-1,10,main]-9Thread[thread-1,10,main]-10Thread[thread-1,10,main]-11Thread[thread-1,10,main]-12Thread[thread-1,10,main]-13Thread[thread-1,10,main]-14Thread[thread-1,10,main]-15Thread[thread-1,10,main]-16Thread[thread-1,10,main]-17Thread[thread-1,10,main]-18Thread[thread-0,5,main]-2Thread[thread-1,10,main

collection takes to run the program. The formula is 1/(1+n) Concurrent collector Settings -xx:+cmsincrementalmode: Set to incremental mode. Applies to single CPU conditions. -xx:parallelgcthreads=n: Set the concurrency collector the number of CPUs used by the young generation collection method for parallel collection. The number of parallel collection threads. Reference Links:Http://www.open-open.com/lib/view/open1408453806147.htmlHttp://www.codeceo.com/article/j

Number of young generation GC events. Ygct Young generation garbage collection time. FGC Number of full GC events. Fgct Full garbage collection time. GCT Total garbage collection time. lgcc Cause of last garbage Collection. Gcc Cause of current garbage Collection. VIII, JVISUALVMNBSP; Java VISUALVM is a release version o

These two days are watchingAlgorithmThe optimal binary search tree in the introduction. for how to implement the dynamic planning of the optimal binary search tree, see Chapter 15th of Introduction to algorithms. I have pasted the optimal binary search tree implemented in Java for your reference. Package homework. part5.work1; import

derive a subclass from the thread class and override the Run method, and the object created with that subclass is a thread. It is important to note that the thread class has implemented the Runnable interface, so any thread has its run method, and the Run method contains the code that the thread wants to run. The activity of a thread is controlled by a set of methods. The Java language supports simultaneous execution of multiple threads and provides

. Radial gradient color fill");Graphics2D g2d = (graphics2d) g.create ();float cx = this.getwidth ()/2;float cy = this.getheight ()/2;//(Cx,cy is the center coordinate)float radius = math.min (cx,cy);//Circle radiusfloat[] Fractions = new float[]{0.1f,0.5f,1.0f};//color Ramp keyframe Positioncolor[] colors = new color[]{color.red,color.green,color.black};//color arrayRadialgradientpaint RGP = new Radialgradientpaint (cx,cy,radius,fractions,colors, MultipleGradientPaint.CycleMethod.NO_CYCLE);G2d.

Introduction: We usually have a phone book to record the phone numbers of all our friends. However, if a friend often contacts us, we can remember that the phone numbers of those friends do not need to be translated. However, if we haven't been in touch for a long time, we have to ask for a phone book when we want to contact the friend again. However, it takes a