我创建了一个学生类，它有两个不同的构造函数，一个是默认构造函数Student()
另一个是有参数的
学生(字符串studentID，字符串studentName，字符串research_intrest，字符串主题，int []类(class)， boolean 批准，字符串supervisorID)
对象 Student 存储我的程序将读取的文件中的数据
该程序要求用户从console输入一些数据，因此如果id与我在Student类中存储的数据不相似，程序将存储该数据
在检查 id 是否与存储的 ID 不同后，我开始通过将领事馆的新数据设置为学生对象来存储新数据，直到我停止添加类(class)数组，因为学生类参数有一个 int[] 类(class)，并且我必须存储字符串值我正在考虑将字符串数组转换为字符数组，但我不确定它是否有效
我从student.txt中读取的文件包含:
1723, Asma, artificial intelligent, How the machine thinks: intelligent learning,1,1,1,1,1,1,true,00023#
1777,Rania, database, nan,1,1,1,0,0,0,false,0#
1003,Sara, network, nan,1,1,1,1,1,1,true,00013#
1743,Roaa, artificial intelligent, nan,1,1,1,0,0,0,false,0#
这是我迄今为止尝试过的代码:
public static void main(String[] args)throws Exception {
File studentFile=new File("student.txt");
if (!studentFile.exists()) {
System.out.println("Sorry the file is not found!"); //checks if the file exists if no it terminates the program
System.exit(0);
}
String[]array=null;
Student stu=null;
Scanner stuRead=new Scanner(studentFile);
Scanner input=new Scanner(System.in);
while(stuRead.hasNext()){
array = stuRead.nextLine().split("#|,\\s|,");
stu=addStudent(array);
System.out.println(stu.toString());
}
System.out.println("Please enter the student information: ");
System.out.println("");
System.out.print("Student ID: ");
String id=input.next();
Student st=new Student(id);
if(st.check_std(id)){
System.out.print("Student Name: ");
String name=input.nextLine();
stu.setStudentName(name);
System.out.println("");
System.out.print("Research interest: ");
String res=input.nextLine();
stu.setResearch_intrest(res);
System.out.println("");
System.out.println("Courses: ");
String cor=input.nextLine();
String[] c=cor.split(",\\s");
stu.setCourse(c); //here the error occurs
System.out.println("");
System.out.println("The student is added!");
}else{
System.out.println("The student already exists! ");
}
public static Student addStudent(String[]arr)throws Exception{
String id=arr[0];
String name=arr[1];
String researchIntrst=arr[2];
String suggestTopic=arr[3];
String s="";
if(suggestTopic.equals("nan")){
s=" ";
}else{
s+=suggestTopic;
}
int[]courses=new int[6];
int num1=Integer.parseInt(arr[4]);
int num2=Integer.parseInt(arr[5]);
int num3=Integer.parseInt(arr[6]);
int num4=Integer.parseInt(arr[7]);
int num5=Integer.parseInt(arr[8]);
int num6=Integer.parseInt(arr[9]);
for (int i = 0; i <courses.length ; i++) {
courses[0]=num1;
courses[1]=num2;
courses[2]=num3;
courses[3]=num4;
courses[4]=num5;
courses[5]=num6;
}
String apprv=arr[10];
boolean approve=false;
if(arr[10].equals("true")){
approve=true;
}else{
approve=false;
}
String superId=arr[11];
return new Student(id,name,researchIntrst,s,courses, approve,superId);}
}
这是学生类(class):
public class Student {
private String studentID;
private String studentName;
private String research_intrest;
private String Topic;
private int [] course;
private boolean approval; //true or false
private String supervisorID;
private Student next;
public Student(){
studentID = null;
studentName = null;
research_intrest = null;
Topic = null;
course = null;
approval = false;
supervisorID = null;
next=null;
}
public Student(String studentID, String studentName, String research_intrest, String Topic, int[] course, boolean approval, String supervisorID) {
this.studentID = studentID;
this.studentName = studentName;
this.research_intrest = research_intrest;
this.Topic = Topic;
this.course = course;
this.approval = approval;
this.supervisorID = supervisorID;
}
public Student(String studentID) {
this.studentID = studentID;
}
public boolean check_std(String id){
if(id.equals(this.studentID)){
return false;
}
return true;
}
public String getStudentID() {
return studentID;
}
public void setStudentID(String studentID) {
this.studentID = studentID;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public String getResearch_intrest() {
return research_intrest;
}
public void setResearch_intrest(String research_intrest) {
this.research_intrest = research_intrest;
}
public String getTopic() {
return Topic;
}
public void setTopic(String Topic) {
this.Topic = Topic;
}
public int[] getCourse() {
return course;
}
public void setCourse(int[] course) {
this.course = course;
}
public boolean isApproval() {
return approval;
}
public void setApproval(boolean approval) {
this.approval = approval;
}
public String getSupervisorID() {
return supervisorID;
}
public void setSupervisorID(String supervisorID) {
this.supervisorID = supervisorID;
}
public Student getNext() {
return next;
}
public void setNext(Student next) {
this.next = next;
}
@Override
public String toString() {
return "student{" + "studentID=" + studentID + ", studentName=" + studentName + ", research_intrest=" + research_intrest + ", Topic=" + Topic + ", course=" + Arrays.toString(course) + ", approval=" + approval + ", supervisorID=" + supervisorID + '}';
}
}
预期的输出是这样的:
Please enter the student information:
student ID:1333 Student Name: Areej research interest: software engineering courses: CPCS223, CPIS334, CPCS351, CPCS241, CPCS361, CPCS331
The student is added!
---------------------------------------------------
Please enter the student information:
student ID:1723
The student already exists!
最佳答案
在发送之前您必须将其转换为 int 数组
String[] c=cor.split(",\\s");
int[] intArray = new int[c.length];
for(int i=0; i < c.length; i++){
intArray[i] = Integer.parseInt(c[i])
}
stu.setCourse(intArray)
;
关于java - 当我创建的类需要一个 int 数组时，我如何传递一个 String 数组(包含 : , 字母、数字和空格)？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58130845/