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String classScanner in =NewScanner (system.in); System.out.println ("Enter a string to check if it is a palindrome"); Original=In.nextline (); intLength =original.length (); for(inti = length-1; I >= 0; i--) Reverse= Reverse +Original.charat (i); if(original.equals (reverse)) System.out.println ("Entered string is a palindrome."); ElseSystem.out.println ("entered string isn ' t a palindrome."); }} Public int Countword (String Word, file file) {int count = 0new Scanner (file); while (Scan

Server and so on.2. Under the premise of not destroying the 1 deployment, also use Oldboy user to complete multiple keys to a lock (B,c key, a lock)-Free landing deployment as follows:B---------->aC---------->aNote: This topic is used in the production environment, data backup, etc., but the production environment this way is recommended to be implemented by the daemon process.The goal of the final realization is, 1, 22 topics to achieve two-way password-free authentication login.3. If you incr

5 Servlet 80 For readability, the results after querying this table are explicitly as follows (passing score is 60), please write out the SQL implementation statement CourseID Coursename Score Mark 1 Java 70 Pass 2 Oracle 90 Pass 3 Xml 40 Fail 4 Jsp 30 Fail 5 Servlet 80 Pass 9, writ

number, SNAME for nameC (cno,cname,cteacher) course relationship. CNO as course number, CNAME as course name, Cteacher as InstructorSC (sno,cno,scgrade) course selection relationship. Scgrade as a result Find out the names of all students who have not been enrolled in the "Li Ming" teacher course (4 points) Names of students with two or more (including two) failed courses and their average score (4 points) List all students who have studied the course "1" and who have studied "