java - Getters returning null values when called in another class file -

my 'driver' program not return except null values have put constructors. other values work fine, name, major, id, , studenttype not work, , null returned.

here student file:

public class student { private string name;        //name of student private string id;          //student id private string major;       //student's major private int completedhours; //number of hours student has completed private int qualitypoints;  //number of overall quality points student has earned private char studenttype;   //type of student g (graduate) u (undergraduate) x (invalid type)  public student() {  }//end student()  public student(string name) {     getname(); }//end student(string)  public student(string name, string id, string major, char studenttype) {     getname();     getid();     getmajor();     getstudenttype(); }//end student(string, string, string, char)  public void setname(string name) {     name = this.name; }//end setname(string)  public void setid(string id) {     id = this.id; }//end setid(string)  public void setmajor(string major) {     major = this.major; }//end setmajor(string)  public void setcompletedhours(int hours) {     if (hours > 0)         completedhours = hours; }//end setcompletedhours(int)  public void setqualitypoints(int points) {     if (points > 0)         qualitypoints = points; }//end setqualitypoints(int)  public void setstudenttype(char type) {     if (type == 'g' || type == 'g')         type = 'g';     if (type == 'u' || type == 'u')         type = 'u';     if (type != 'u' || type != 'g')         type = 'x';     if (type != 'u' || type != 'g')         type = 'x';      type = studenttype; }//end setstudenttype(char)  public string getname() {     return name; }//end getname()  public string getid() {     return id; }//end getid()  public string getmajor() {     return major; }//end getmajor()  public int getcompletedhours() {     return completedhours; }//end getcompletedhours()  public int getqualitypoints() {     return qualitypoints; }//end getqualitypoints()  public char getstudenttype() {     return studenttype; }//end getstudenttype()  public double gpa() {     double dgpa;     double dpoints = qualitypoints;     double dhours = completedhours;      dgpa = dpoints/dhours;      return dgpa; }//end gpa()  public void addcompletedhours(int hours) {     if (hours > 0)         completedhours += hours; }//end addcompletedhours(int)  public void addqualitypoints(int points) {     if (points > 0)         qualitypoints += points; }//end addqualityhours(int)  public string classification() {     string strclass = "";      if (studenttype == 'g')         strclass += "graduate student, ";     if (studenttype == 'u')         strclass += "undergraduate, ";     if (studenttype == 'x')         strclass += "invalid student type, ";      if (completedhours >= 90)         strclass = "senior";     if (completedhours < 90)         strclass = "junior";     if (completedhours < 60)         strclass = "sophomore";     if (completedhours < 30)         strclass = "freshman";      return strclass; }//end classification()  public string studentrecord() {     decimalformat df = new decimalformat("#,###0.000");     string stroutput = "";      stroutput += "\n           name: " + name;     stroutput += "\n             id: " + id;     stroutput += "\n          major: " + major;     stroutput += "\ncompleted hours: " + completedhours;     stroutput += "\n quality points: " + qualitypoints;     stroutput += "\n            gpa: " + df.format(gpa());     stroutput += "\n classification: " + classification();      return stroutput; }//end studentrecord() }//end student 

and 'driver' file:

import java.util.scanner;  public class proj3 { public static void main(string[] args) {     scanner kb = new scanner(system.in);      student stu1 = new student("john smith", "1234b", "nursing", 'u');     stu1.setcompletedhours(34);     stu1.setqualitypoints(85);      student stu2 = new student("helen johnson", "5678t", "computer science", 'u');     stu2.setcompletedhours(64);     stu2.setqualitypoints(210);      student stu3 = new student("betty jones", "7890e", "mathematics", 'g');     stu3.setcompletedhours(26);     stu3.setqualitypoints(85);      system.out.println("\njohn smith: " + stu1.classification());     system.out.println("\nhelen johnson: " + stu2.classification());     system.out.println("\nbetty jones: " + stu3.classification());      stu1.addcompletedhours(51);     stu1.addqualitypoints(170);      system.out.print("\njohn smith: " + stu1.studentrecord());     system.out.print("\n\nbetty jones: " + stu3.studentrecord()); } } 

i need have name, id, major, , studenttype displayed when stu1.studentrecord() called.

in constructor, should set, not get:

public student(string name) {     setname(name); }  public student(string name, string id, string major, char studenttype) {     setname(name);     setid(id);     setmajor(major);     setstudenttype(studenttype); } 

and correct setters:

public void setname(string name) {    this.name = name; // not name = this.name !!! }  // in other setters: // this.id = id // this.major = major // this.studenttype = type