Ai Fix Hộ VS

[tapdoansonutu1]

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<div><blockquote> package edu.java;

import java.util.scanner;


/**
*
* @author nguyenhuu
*/

public class sinhvien {
private string sbd,hotensv,addresssv,hocphan;
private float dthk1,dthk2;
scanner nhapdl=new scanner(system.in);
public sinhvien() {
sbd=this.sbd;
hotensv=this.hotensv;
addresssv=this.addresssv;
hocphan=this.hocphan;
dthk1=this.dthk1;
dthk2=this.dthk2;
}

public string getsbd() {
return sbd;
}

public void setsbd(string sbd) {
this.sbd = sbd;
}

public string gethotensv() {
return hotensv;
}

public void sethotensv(string hotensv) {
this.hotensv = hotensv;
}

public string getaddresssv() {
return addresssv;
}

public void setaddresssv(string addresssv) {
this.addresssv = addresssv;
}

public string gethocphan() {
return hocphan;
}

public void sethocphan(string hocphan) {
this.hocphan = hocphan;
}

public float getdthk1() {
return dthk1;
}

public void setdthk1(float dthk1) {
this.dthk1 = dthk1;
}
public float getdthk2() {
return dthk1;
}

public void setdthk2(float dthk1) {
this.dthk1 = dthk1;
}
public void nhaptt(){
system.out.print("nhap tt sbd : ");
setsbd(nhapdl.nextline());
system.out.print(" nhap tt ho ten : ");
sethotensv(nhapdl.nextline());
system.out.print("nhap tt address : ");
setaddresssv(nhapdl.nextline());
system.out.print(" nhap tt hoc phan : ");
sethocphan(nhapdl.nextline());
system.out.print(" nhap diem thi hk1 : ");
setdthk1(nhapdl.nextfloat());
system.out.print("nhap diem thi hk2 : ");
setdthk2(nhapdl.nextfloat());
}
public void showtt(){
system.out.println(" sbd "+getsbd());
system.out.println("ho ten "+gethotensv());
system.out.println("address "+getaddresssv());
system.out.println("tt hoc phan "+gethocphan());
system.out.println(" diem thi hk1 "+getdthk1());
system.out.println("diem thi dk2 "+getdthk2());
}

}
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<div><blockquote>/*
* to change this template, choose tools | templates
* and open the template in the editor.
*/
package edu.java;

import java.util.scanner;

/**
*
* @author nguyenhuu
*/
public class cau3{

/**
* @param args the command line arguments
*/
int n;
sinhvien [] qlsinhvien=new sinhvien[n];
scanner nhapdl=new scanner(system.in);

public void nhapttsv(){
system.out.print(" nhap vao so sinh vien n = ");
n = nhapdl.nextint();
qlsinhvien=new sinhvien[n];
system.out.println("");
for (int i = 0; i <=(qlsinhvien.length-1); i++) {
qlsinhvien.nhaptt();
}
}
public void showttsv(){
system.out.println("hien thi danh sach thong tin sv : ");
for (int i = 0; i <=(qlsinhvien.length-1); i++) {
qlsinhvien.showtt();
}
}
public static void main(string[] args) {
// todo code application logic here
cau3 a= new cau3();
a.nhapttsv();
a.showttsv();
}
}

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khi chạy báo java.lang.nullpointerexception ở phần nhapttsv(); ai chỉ cách fix lỗi này vs. thankss

[tvtrung9x]

đã fix được lỗi closed..