how to practice coding in java

17th digit represents the gender (odd for men). Write a procedure that determines whether a person is a Wuhan person and its gender through the ID number. */String str= "420103199801010312"; if(str.substring (0, 4). Equals ("4201") {System.out.println ("This man is from Wuhan, Hubei province. "); }Else{System.out.println ("This man is not from Wuhan, Hubei. "); } intSex=17; if(Str.charat (sex-1)%2==1) {System.out.println ("This man is male. "); }Else{System.out.println ("

=date;Wuyi } the PublicY (String name,string class,string date) { - This. Name =name; Wu This. Class =Class; - This. Date =date; About } $ PublicY () { - Super(); - } - A @Override + PublicString toString () { the return"Student [name=" + name + "]"; - } $ Public AbstractString speak (); the the } the Importjava.sql.Date; the@SuppressWarnings ("Unused") - Public classHextendsy{ in PrivateString matter; the PublicH (String name,string class,string date,stri

-defined tool class, the previous example can be used in a different way.The late 1.6 release also provides a number of new methods in the Linklist linked list structure. As shown in.The functions of these methods and the existing methods are the same, but there are some differences, the upgrade is for a reason.The difference needs to know which method is clearly used when developing.GetFirst method has a feature, if there is nothing in the list, call the method, there is no thing. It throws an

Due to business needs, the company recently transferred part of the data to the MongoDB database. After deploying the MongoDB database with the corporate DBA, we started our Java Connection MongoDB practice Before you start, recommend two IDE tools to connect to your database 1.rockmongo-on-windows-v0.0.2 (only run successfully in Firefox browser) 2. Robomongo (in 32 machine XP system will not start) Mong