core java programming interview questions

Java BASIC Programming Questions1. Print out the case1 Public classprog19{2 Public Static voidMain (string[] args) {3 intn = 5;4 Printstar (n);5 }6 7 //Print stars8 Private Static voidPrintstar (intN) {9 //print top HalfTen for(inti=0;i){ One for(intj=0;j){ A if(ji) -System.out.print (""); - if(J>=n-i ji) theSys

In order to select a set of questions for students to participate in the national software competition, the time is 150 minutes. If you have learned Java, you can try to see if it can be made. 1, Programming output calendar. Known2011Year3Month18The day is Friday (2011Year), output calendar. For example, enter3Output: DayIII3. ThuV.Sat. 12345 678910 11 12 13 14

bounded blocking queue consisting of an array structure.Linkedblockingqueue: A bounded blocking queue consisting of a list structure.Priorityblockingqueue: An unbounded blocking queue that supports priority sorting.Delayqueue: An unbounded blocking queue implemented using a priority queue.Synchronousqueue: A blocking queue that does not store elements.LinkedTransferQueue: An unbounded blocking queue consisting of a list structure.Linkedblockingdeque: A two-way blocking queue consisting of a lin

Package com.test;Import Java.io.BufferedWriter;Import Java.io.FileOutputStream;Import Java.io.FileWriter;Import Java.io.OutputStream;Import Java.util.Scanner;public class Demo {public static void Main (string[] args) {/* There are five students, each student has 3 courses of results, from the keyboard input above data (including student number, name, three lessons), calculated* Average results, the original data and the calculated average score are stored in the disk File "stud". */Scanner in=ne

Notes for Java and JSP Programming 1. when the println () method is used for objects of the string type, if the object is null, null is printed instead of nullpointerexception, which may lead to the illusion of reference, subsequent operations on strings may cause problems. 2. nullpointerexception is thrown because the object existence is not verified. In JSP programmin