java coding interview questions write code

? A: XML namespaces are similar to Java's package to avoid conflicting labels with the same names for different sources. XML namespaces are defined with the xmlns attribute at the top of the XML document, and the syntax is xmlns:prefix= ' URI '. Prefix is used with the actual label in the XML document. The following example is the use of XML namespaces. Copy Code code as follows: What's t

Java Multithreading interview QuestionsMultithreading and synchronization are considered as the typical chapter in Java programming. In game development company, Mulithreading related interview questions is asked mostly. A List of frequently asked

.Java applet?Mainly due to security reasons, the following restrictions are imposed on the applet:Applets cannot be loaded into class libraries or define local methods.Applets cannot read and write files on a host.Applets cannot read specific system properties.An applet cannot initiate a network connection unless it is an on-boarding host.Applets are not able to open any other programs on the host.6. What i

assignment operator implies automatic forced conversion. Interview Questions: Short s = 1; S = s + 1; Short s = 1; S + = 1; Which of the above Code has a problem? A: short s = 1; s = s + 1; there is a problem, because it will lose precision. In s = s + 1, s + 1 is of the int type. Forced conversion is required if you don't want any problems. That is, s = (short

) {MapNewHashmap(); Premiumphone.put ("Apple", "IPhone"); Premiumphone.put ("HTC", "HTC One"); Premiumphone.put ("Samsung", "S5"); Iterator Iterator=Premiumphone.keyset (). iterator (); while(Iterator.hasnext ()) {System.out.println (Premiumphone.get (Iterator.next ())); Premiumphone.put ("Sony", "Xperia Z"); } } }"Main" java.util.ConcurrentModificationException at java.util.hashmap$hashiterator.nextentry (Unknown SOURCE) at Java.util.hashmap$keyiterator.next (Unknow

I used to have only one Java interview question topic. Now I have divided into the following topics: Java interview questions are of course the focus, all of which are Java programming and directly related to the design. Intelli

create threads, how to create threads better (such as inheriting the thread class or calling the Runnable interface), and then gradually ask about concurrency problems like the Java memory model encountered in the process of Java concurrent programming, JDK1.5 introduces higher-order concurrency tools, common design patterns for concurrent programming, classic multithreading issues such as producer consume

Basic java exception knowledge and some interview questions Java is an object-oriented design language, so exceptions are encapsulated into classes in java, and we only need to know how to handle exceptions, Exception Overview Exception: An exception occurs when the

so file not foundNoclassdeffounderror: You can find the right class at compile time, but you can't find the right class at runtime.Iv. outofmemoryerror (Memory overflow)Cause:1, the amount of data loaded in memory is too large, such as the last time to remove too much data from the database.2, the collection class has a reference to the object, after use is not emptied, so that the JVM can not be recycled.3. There are dead loops or loops in the code

In the Java Pure Grammar interview, mainly encountered some of the basic interview questions, summarized here!First, to talk about final, finally, finalize the difference. final-modifier (keyword) If a class is declared final, it means that it can no longer derive a new subclass and cannot be inherited as a parent c

First, let's talk about the differences between final, finally, and finalize.　　Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?　　Third, the difference between static nested class and inner class is that the more you say, the better (the more general the interview questions are ).　　Fourth, the difference bet

Java Architects interview questions, how to become architectsOften interview some candidates, sorted out my interview using the topic, LU continued to organize a lot of problems, so each time to draw a part to ask. The answer will be gradually released in later articles. B

Java Multithreaded interview questions 1. What is the difference between processes and threads? A process is a stand-alone (self contained) operating environment that can be viewed as a program or an application. A thread is a task that is performed in a process. The Java Runtime environment is a single process that

wrapper type , which means that the wrapper type can be converted directly to the base data type , as shown in the following code:int m=100; Integer im=int N=im; The appeal code directly assigns m to the wrapper object IM, which is automatically boxed and then directly assigns the IM to the basic data type N, which is the automatic unpacking. Although the code on the surface is simple and convenient, ho

last link in the download page: Zen coding for Web page Shortcut key Description: Ctrl + E: Expand Code CTRL + D: Outward Quick Select block SHIFT + CTRL + D: To quickly select the code block SHIFT + CTRL + A: Enter an abbreviation, automatically expand and surround the selected code CTRL + alt+→: Cursor Smart jump t