java interview questions for 2 years experience

. 64. What are the similarities and differences between JSP and Servlet, and what are their relationships? JSP is an extension of Servlet technology. It is essentially a simple Servlet method, with more emphasis on the external expression of the application. After JSP compilation, it is "servlet-like ". The main difference between Servlet and JSP is that the application logic of Servlet is in the Java file and is completely separated from the HTML in

Discuz Cainiao: I am a beginner in java, business php, and android for two years .. Next year, I plan to do secondary development, how to do secondary development for discuz, and how to learn it. Please enlighten me, read the discuz code first, and there is no quick discuz code to better understand. discuz Cainiao, please enlighten me. I have 2

difference between the 5.sendRedirect () and Forward () methods?The Sendredirect () method creates a new request, and the forward () method simply forwards the request to a new target. After redirection (redirect), objects that were within the scope of the previous request are invalidated because a new request is generated, and after forwarding (forwarding), objects within the scope range of the previous request can be accessed. Sendredirect () is generally considered to be slower than forward

,finally in Try Catch finally,try?Excption and error packet structure. Oom What situation you have encountered, SOF what you have encountered.Three features and meanings of Java-oriented objects.The meaning of override and overload to distinguish.The difference between interface and the abstract class.The difference between static class and non static class.The implementation principle of Java polymorphism.

2.importjava.awt.flowlayout;importjava.awt.gridlayout;importjava.awt.menu;import java.awt.menubar;importjava.awt.menuitem;importjavax.swing.jcheckbox;import javax.swing.jcombobox;importjavax.swing.jframe;importjavax.swing.jpanel;import javax.swing.jradiobutton;importjavax.swing.jtextarea;publicclasstest{public staticvoidmain (String[]args) {jframetest=newjframe (); Test.setLayout ( Newgridlayout (2,1)); Finalmenumenu1=newmenu ("File");finalmenu Menu2=

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Because the classmate introduces, throws a resume, goes to the company interview. The Java Engineer is reported. First, introduce yourself, ask the next item, write a binary lookup insert, and return the location information you want to insert. I had to write this when I was interviewing one months ago, but I thought Java was pretty good. It is written in

Java interview question: if an array [2, 4, 6, 2,] is known, sort the Array (in descending order, the tool class cannot be used for sorting) and create two threads to output the sorted array alternately, thread name customization, Package com. swift; import java. util. array

+ //Example 4 - //Interview question: Please design an expression to determine whether a data is an odd number $ //System.out.println (5%2); $ //System.out.println (5%-2); - //System.out.println ( -5%2); - //System.out.println ( -5%-

Main (string[] args){Inti = 1,k = 0;do{if (i%3==0){if (kSystem.out.println (i);k++;}i++;}while (i}}Class for{publicstatic void Main (string[] args){Inti = 1,k = 0;for (; i{if (i%3==0k{System.out.println (i);k++;}}}}19. Nested Loops and Process ControlNested loops: Loop inside loopAssuming that the number of cycles in the outer loop is M, the number of cycles in the loop is n times, then the number of cycles in the inner loop needs M * N times.Eg: The multiplication table is printed using the ne

Java interview questions (answer)First, let's talk about the differences between final, finally, and finalize.Final? Modifier (keyword) If a class is declared as final, it means that it cannot generate a new subclass and cannot be inherited as a parent class. Therefore, a class cannot be declared both abstract and final. Declare variables or methods as final to e

? In switch (expr1), expr1 is an integer expression. Therefore, the parameters passed to the switch and case statements should be int, short, Char, or byte. Long and string cannot apply to swtich.38. hashtable and hashmap Hashtable inherits from the dictionary class, while hashmap is an implementation of the map interface introduced by java1.2.Hashmap allows null as the key or value of an entry, while hashtable does not.In addition, hashmap removes the hashtable contains method and changes it

based on Unicode encoding Private Static BooleanIschinese (Charc) {Character.unicodeblock UB=Character.UnicodeBlock.of (c); if(UB = = Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS | | ub = =Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS|| UB = = Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A | | UB = =Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B|| UB = = Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION | | UB = =Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FO

getbean,spring of Spring calling Beanfactory examines the constructor that determines the call. and instantiate the Bean. When the instantiation is complete, spring invokes the Populatebean method of the Bean factory, and the Populatebean method calls the Beanpostprocessor instance to complete the automatic assembly of the property element. To populate the attributes of the bean instance, which is the automatic assembly we mentioned earlier, spring checks to see if the assembled property has ot

java 12th Week learning experience In the 12th week of the theory class, the teacher of the 1-4 chapters of the content of the test, the program fill in the blanks and write procedural questions are not very high, the important part of the program is missing, for the total number of books that will not be written, deduction points more, but now have mastered, th

Java second week learning experienceThis week in Thursday, the teacher conducted a classroom test, completely surprised me, I thought the teacher will be in the first two weeks to talk about, because I did not prepare before class, reversing the class to some unprepared, those questions many many do not, also wrong many, the class has a lot of good students, they prepare fully before class, In the classroom

Analysis of the Java2 Programmer examination (SCJP) -- Linux general technology-Linux programming and kernel information. The following is a detailed description. Preface Whether you are a newbie or an expert in programming, you will be amazed by the Infinite Charm of Sun's Java. Java brings you more than just the advantages of object-oriented, open, platform-independent, easy-to-use, secure, and "Write on

The second week ended quickly, I learned the new language of Java for two weeks, and the teacher's classroom was basically adapted. This week we learned about the Java Basic program design structure, which is basically similar to the C language I learned, like identifiers, keywords, annotations, and so on. Because of the basis of C, I learned this chapter is not too difficult.I learned something different f

PrefaceWhether you are a newbie or an expert in programming, you will be amazed by the Infinite Charm of Sun's Java. Java brings you more than just the advantages of object-oriented, open, platform-independent, easy-to-use, secure, and "Write once, run anywhere" software development. More importantly, it provides a novel way of expressing ideas and a brand new way of thinking. As the scale of the problem to