java-Basic Package

 PackageTest.studet_manager; Public classStudent {Static intnum = 100; //numbered--Unique    Private  intNumber =-1; //name    PrivateString name = ""; //Sex    PrivateString sex = ""; //Age    Private intAge =-1; //class    PrivateString grade = ""; //Achievements    Private intScore =-1; /** methods for set and get*/     Public voidsetsex (String sex) { This. Sex =sex; }         PublicString Getsex () {returnsex; }         Public voidsetName (String name) { This. Name =name; }         PublicString GetName () {returnname; }         Public voidSetage (intAge ) {        //age must be greater than 0        if(age>=0) {             This. Age =Age ; }            }         Public intGetage () {returnAge ; }         Public voidSetgrade (String grade) { This. grade =grade; }         PublicString Getgrade () {returngrade; }         Public voidSetScore (intscore) {        if(Score >= 0) {             This. score =score; }            }         Public intGetscore () {returnscore; }         Public voidSetnumber (intNumber ) {         This. Number = This. number+0; }     Public intGetNumber () {returnNumber ; }         PublicStudent () {//TODO auto-generated Constructor stub++num;  This. Number =num; }     PublicStudent (intnumber,string name,string Sex,intAge,string grade,intscore)        {GetNumber ();        GetName ();        Getsex ();        Getage ();        Getgrade ();    Getscore (); } @Override PublicString toString () {//TODO auto-generated Method Stub        return""+ This. number+ "" + This. name+ "" + This. sex+ "" + This. age+ "" + This. grade+ "" + This. score+ "\ n"; } @Override Public Booleanequals (Object obj) {//TODO auto-generated Method Stub//determines whether the object to compare is not NULL        if(obj = =NULL) {            return false; }        //judging the object to compare is not itself        if(obj = = This) {            return true; }        //determine if the object to compare is not the same type        if(objinstanceofStudent) {Student Student=(Student) obj; returnstudent.number== This. number&&student.name== This. name&&student.sex== This. sex&&student.age== This. age&&student.grade== This. grade&&student.score== This. Score; }        return false; } @Override//Note: The Hashcode method must be consistent with the attributes in the Equals method     Public inthashcode () {//TODO auto-generated Method Stub        return  This. number- This. Name.hashcode ()- This. Sex.hashcode ()- This. age- This. Grade.hashcode (); }    //write some of your own ways     Public voidLearn () {System.out.println ( This. name+ "Learning computer language"); }}

java-Basic Package