java coding interview questions write code

Program small white in the process of writing code, often inadvertently write a memory overflow exception occurred code. A lot of times this kind of anomaly how to produce all silly confused, if can deliberately write to let JVM memory overflow code, sometimes it seems not e

Computer questions (Elementary)-drawing the full-sky-star instance code (Java) It is very simple to draw a small program with a canvas and a paint brush. It is suitable for beginners to learn and use: Import java. awt. color; import java. awt. frame; import

Recently, I want to use a web page to display lucene search results. I can use php and javabridge on the internet. However, I can't use the example in javabridge or the class I wrote myself. Apache2.2 + php5 + mysql can now call java's own classes such as java. lang. String, but it cannot be written by yourself... In addition, javabrid has a question about how php calls lucene (JAVA)

Recently, you need to manually write SQL statements directly into Java code and write SQL statements, and there are a few minor issues to be aware of.First of all I wrote a few simple SQL statements, self-thought no problem, but the compilation of direct error. 1 String str = "INSERT into XXX (a,b,c) VALUES ('" A.geta

Computer questions (Elementary)-Snowball example code (Java) In the previous section, the effects of the stars are achieved. This section will implement a small example of snowball rolling. here we need to use the re-painting and thread knowledge. The Code is as follows: import java.awt.Color;import java.awt.Frame;imp

requirements of the interception class (Interceptor class or handle class or Hook method) , and then look at the problem, is this scenario impossible to appear?You may find that such a scenario does not occur, as long as the system runs, it is impossible to affect the project.That's because the code we're showing here is simple, it's easy to penetrate, there are more than one or two constructors in a project, and the relationships between classes are

This article comes from a hot discussion on the StackOverflow question and answer website: How to write a piece of code in Java that will cause a memory leak.Q: I was in the interview just now, and the interviewer asked me how to write out the

How to write a piece of code in Java to cause memory leakage Q:I attended the interview just now. The interviewer asked me how to write the Java code with Memory leakage. I have no ide

Q: I was in the interview just now, and the interviewer asked me how to write out the Java code that would be leaking memory. I have no idea of this problem, it's embarrassing.A1: memory leaks can be easily generated by the following steps (program code cannot access some ob

method.Back to top recommended 46:equals should consider a null value scenarioContinuing with the 45 suggested questions, we solved the question of the reflexive nature of the overwrite equals, is it perfect? To refactor the main method:public static void main (string[] Args) {person p1= new person ("zhang san"); Person p2= the new person (null);/* no changes in other parts, no more repeating */}Very small changes, you must know that th

method.Back to top recommended 46:equals should consider a null value scenarioContinuing with the 45 suggested questions, we solved the question of the reflexive nature of the overwrite equals, is it perfect? To refactor the Main method:public static void Main (string[] args) {person p1= new person ("Zhang San"); Person p2= the new person (NULL);/* No changes in other parts, no more repeating */}Very small changes, you must know that th

Building maintainable Software-java Write clean CodeWriting Clean code is the what you must does in order to call yourself a professional. -robert C. Martinguideline:? Write Clean Code.? Do the leaving code smells behind after de

also be called, the software is robust under different platforms. a software can detect its own internal design or coding errors, and get the correct execution results, this is the correctness of software standards, but also can be said that the software has internal protection mechanism, is the module-level robust. software robustness is a relatively vague concept, but it is a very important external measurement standard of software. The robustness

Java 9 just released a few months, a lot of things are not clear, now Java 10 is coming soon. At this time I really want to say: Online JDK 7 or even JDK 6,JDK 8 is not cooked, JDK 9 released soon do not know what the thing, jdk 10 ... Just learn Java classmate is not feel a face of force?!! Even my old driver feels the same way!

Java 9 only released for a few months, a lot of things do not understand, now Java 10 is coming again. This time I really want to say: the online JDK 7 or even JDK 6,JDK 8 is not ripe, JDK 9 released soon do not know what things, jdk 10 ... Just learn Java students are not feeling a face of forced .... Even my old driver feels the same way.

The question about how to read and write TXT files in Java is often asked during the interview. Do not understand or be unfamiliar with the comrades, but remember it! Let's take a look at the specific implementation! Package common; Import java. Io .*; Import java. util. arr