java interview programs

! = STR2STR1 = = str2So what's the output of the second program? The first way we talked about this is not to take the initiative to add the object to the string pool, but with an exception, calling the Intern () method manually will force a reference to the object to be added to the string pool. So the result of the second procedure isSTR1 = = str2"Question 4"differences and linkages between String pool and const poolKnowing the Java memory model, th

---- Abstract: before the emergence of Java, writing multi-threaded programs was cumbersome and accompanied by many insecure factors. Using Java to write secure and efficient multi-threaded programs becomes simple, and using multi-threaded and Java Network packages, We can c

(throughput) collector? The throughput collector uses a parallel version of the new generation garbage collector, which is used for medium-sized and large-scale data applications. The serial collector is sufficient for most small applications, which require about 100M of memory on modern processors. 41. In Java, when can objects be garbage collected? This object can be recycled when the object becomes inaccessible to applications that currently use t

Translated from: http://luanxiyuan.iteye.com/blog/1937081IKVM. NET is a Java implementation for the mono and Microsoft. NET Framework, designed to run Java programs on the. NET platform. This article will be a more detailed introduction to the principle of this tool, the use of getting started (how to convert Java appl

This article comes from an excerpt from the Java Web Lightweight Development Interview tutorial.Why choose this from a variety of Java books? Why buy this book when the current amount of network information is so large, instead of learning by accessing the web? I have already developed a Java Web application, is it nec

experience, the biggest harvest or, I am more certain of the interview like to test what knowledge points!Java language, JavaScript, jquery, database, Spring, hibernate, struts are the technologies that Java programmers must master, and I think that in knowledge you should be prepared for these:1, these technology respectively love to test what knowledge points,

Different Java Versions differ in the integrity of their supported core category Library and the supported Java basic types, that is, whether you are developing a Java program used by the enterprise, a Java program executed on an embedded device, an applet executed on a browser, or an application executed on a PC. You

running Tomcat under the console window;7. Test the above configured services and run the C: \ Myservapp\bin\installmyapp-nt.bat will install your application (here, nioblockingserver) into the WIN32 system service.8. Open Control Panel-hypervisor-services, see NiO nonblocking server is already in system service, and other usage is the same as the familiar Windows service.Tomcat uses Java service wrapper mode two, which requires minor changes to exis

ProcessWe know that the program is static on disk, and when he is loaded into memory, it becomes a dynamic, called a process, as the program is loaded into memory, the distribution in memory is as follows this figure from http://blog.csdn.net/woshinia/article/details/41722085 specific each paragraph of the role can refer to this article, here we just want to know about , when the program is loaded into memory, it is divided into code snippets, data segments, heap segments, and stack segments. Th

Multithreading in Java programs is much easier to use than C or C ++, because the Java programming language provides language-level support. This article uses simple programming examples to illustrate how intuitive multithreading is in Java programs. After reading this artic

running Tomcat under the console window;7. Test the above configured services and run the C: \ Myservapp\bin\installmyapp-nt.bat will install your application (here, nioblockingserver) into the WIN32 system service.8. Open Control Panel-hypervisor-services, see NiO nonblocking server is already in system service, and other usage is the same as the familiar Windows service.Tomcat uses Java service wrapper mode two, which requires minor changes to exis

. Otherwise, assertionerror is thrown. In addition, assert Eighth, what is GC? Why does GC exist?GC is the meaning of garbage collection (gabage collection). Memory Processing is a place where programmers are prone to problems. Forgetting or wrong memory collection can lead to instability or even crash of programs or systems, the GC function provided by Java can automatically monitor whether the object exc

that their productivity has increased since the change. This is partly because class type determination is strictly executed during compilation and execution, and the simplicity of automatic memory management. Another factor is the set of standard APIs developed for the Java platform. These APIs may be a major challenge for new staff, but once learned, they will provide excellent cross-platform support for various enterprise needs. Of course, for som

Program Summary IKVM. NET is a MonoAnd the Java implementation of the Microsoft. NET Framework, designed to run Java programs on the. NET platform. This article will give a more detailed introduction to the rationale of the tool, how to get started with Java applications. NET application and how to develop it in

applied and released, and the heap is commonly used to allocate new keywords.Stack space is limited, the heap space is a large free zoneWhat is 7.GC? Why do you have a GC?GC is the meaning of garbage collection (Gabage Collection), memory processing is where programmers are prone to problems, forgetting or wrong memory recycling can cause program or system instability or even crashes, The GC functionality provided by Java can automatically monitor wh

interview and other books? First of all, I work in this company so far is still relatively happy, the boss is more open-minded, allowing me to play in the module I am better at, so there is no intention of leaving, but in case of resignation for some reason? The short-term effect of this book can not only supplement the basic knowledge, but also better face the possibility of leaving the situation, and then chose this book to read.I will read this bo

The biggest advantage of writing applications in the Java language is "compile once, run everywhere", but this is not to say that all Java programs have cross-platform features, and in fact, quite a few Java programs do not operate correctly on other operating systems. So ho

The biggest advantage of writing applications in the Java language is "compile once, run everywhere", but this is not to say that all Java programs have cross-platform features, and in fact, quite a few Java programs do not operate correctly on other operating systems. So ho

IKVM. NET is a Java implementation for the mono and Microsoft. NET Framework, designed to run Java programs on the. NET platform. This article will be a more detailed introduction to the principle of this tool, the use of getting started (how to convert Java applications to. NET application,), hope to bring surprises t

is 443. The HTTP connection is simple and stateless; The HTTPS protocol is a network protocol built by the SSL+HTTP protocol for encrypted transmission and authentication, which is more secure than the HTTP protocol. HTTP uses port 80 by default, HTTPS uses 443 port by default How HTTPS ensures the security of data transmissionHTTPS is actually in the TCP layer and the HTTP layer between the SSL/TLS to secure the upper layer, the main use of symmetric encryption, asymmetric encrypt