以下是代码：
if (selection.equals("yes")){
System.out.print("");
System.out.print("Enter the day of exam you want to search: ");
int search= ScannerUtility.readInt();
int i = 0;
line 43 while( i<a.length && search.equals(a[i].getCourseTitle()) ){
i++;
{
这里是控制台错误：
line 43:
error: int cannot be dereferenced while( i<a.length && search.equals(a[i].getCourseTitle() ) ){
//Here is all the classes
我是意大利人，很抱歉，如果我没有正确翻译。请注意这里是ManagementExams课程：
import java.util.*;
public class ManagementExams{
public static void main(String[] args){
Scanner sc= new Scanner(System.in);
System.out.println("MANAGEMENT EXAMS");
System.out.print("Indicate how many exams do you want to insert: ");
int dim = ScannerUtility.readInt();
int nexams = 1;
Exam [] a = new Exam[dim];
for(int i=0; i<a.length; i++){
System.out.print("Insert the name of the exam " + nexams +":");
String coursetitle = sc.nextLine();
System.out.print("Insert the day of the exam: ");
int day = ScannerUtility.readInt();
System.out.print("Insert the month of the exam: ");
String month = sc.nextLine();
System.out.print("Insert the year of the exam: ");
int year = ScannerUtility.readInt();
System.out.print("Insert the hour of the exam: ");
int hourexam = ScannerUtility.readInt();
Exam b = new Exam(coursetitle,day,month,year,hourexam);
a[i] = b;
nexams++;
}
System.out.print("The number of exams inserted are': " + (nexams-1)+ "\n\n");
System.out.println("Print Exams: \n");
for(int i=0; i<a.length; i++)
System.out.println(a[i]);
System.out.print("Do you want to change the day of certain exams?: ");
String selection = sc.nextLine();
if (selection.equals("yes")){
System.out.print("");
System.out.print("Insert the name of the exam you want to search: ");
String search= ScannerUtility.readString();
int i = 0;
while( i<a.length && search.equals(a[i].getCourseTitle()) )
i++;
if(i<a.length){
System.out.println("I found the following exam: \n" + a[i]);
System.out.print("Change the day: ");
int day= ScannerUtility.readInt();
a[i].setDay(day);
}
else{
System.out.println("No exam was found ");
System.exit(0);
}
}
else if(selection.equals("no"))
System.exit(0);
for(int i=0; i<a.length; i++)
System.out.print("Mold the update data of the exams: \n" + a[i] +"\n");
}
}
这里的课程考试：
public class Exam{
private String coursetitle;
private int day;
private String month;
private int year;
private int hourexam;
//CONSTRUCTOR
public Exam(String coursetitle,int day,String month,int year,int hourexam){
this.coursetitle=coursetitle;
this.day=day;
this.month=month;
this.year=year;
this.hourexam=hourexam;
}
//SET METHODS
public void setCourseTitle(String a){
this.coursetitle=a;
}
public void setDay(int a){
this.day=a;
}
public void setMonth(String a){
this.month=a;
}
public void setYear(int a){
this.year=a;
}
public void setHourExam(int a){
this.hourexam=a;
}
//GET METHODS
public String getCourseTitle(){
return this.coursetitle;
}
public int getDay(){
return this.day;
}
public String getMonth(){
return this.month;
}
public int getYear(){
return this.year;
}
public int getHourExam(){
return this.hourexam;
}
//TOSTRING
public String toString(){
return coursetitle +"\n" + day + "\n" + month + "\n" + year +"\n" + hourexam;
}
}
这两个类都正确构建和编译，但是当我使用像“math”这样的coursetitle创建一个考试然后我尝试搜索它时，使用字符串输入“math”，程序跳转到println方法“没有找到考试”
答案 0 :(得分：2)
search是int，无法解除引用（即您无法使用.）。如果它是一个整数，似乎使用==可能会起作用，但是getCourseTitle可能会返回一个字符串。在这种情况下，将整数转换为字符串。
while (i < a.length && Integer.toString(search).equals // etc.
答案 1 :(得分：0)
//问题已解决;）
import java.util.*;
public class ManagementExams{
public static void main(String[] args){
Scanner sc= new Scanner(System.in);
System.out.println("MANAGEMENT EXAMS \n");
System.out.print("Indicate how many exams do you want to insert: ");
int dim = ScannerUtility.readInt();
int nexams = 1;
Exam [] a = new Exam[dim];
for(int i=0; i<a.length; i++){
System.out.println("");
System.out.print("Insert the name of the exam " + nexams +":");
String coursetitle = sc.nextLine();
System.out.print("Insert the day of the exam: ");
int day = ScannerUtility.readInt();
System.out.print("Insert the month of the exam: ");
String month = sc.nextLine();
System.out.print("Insert the year of the exam: ");
int year = ScannerUtility.readInt();
System.out.print("Insert the hour of the exam: ");
int hourexam = ScannerUtility.readInt();
Exam b = new Exam(coursetitle,day,month,year,hourexam);
a[i] = b;
nexams++;
}
System.out.print("The number of exams inserted are: " + (nexams-1)+ "\n\n");
System.out.println("Print Exams: \n");
for(int i=0; i<a.length; i++){
System.out.println(a[i].toString());
}
System.out.print("Do you want to change the day of certain exams?: ");
String selection = sc.nextLine();
if (selection.equals("yes")){
System.out.print("");
System.out.print("Insert the name of the exam you want to search: ");
String search = ScannerUtility.readString();
boolean var = false;
for(int i=0; i < a.length; i++){
if(search.equals(a[i].getCourseTitle()) ){
var = true;
System.out.println("I found the following exam: \n" + a[i].toString() );
System.out.print("Change the day: ");
int newday = ScannerUtility.readInt();
a[i].setDay(newday);
}
}
if(var == false ){
System.out.println("No exam was found ");
System.exit(0);
}
System.out.println("");
for(int j=0; j < a.length; j++){
System.out.println("Exams updated: \n" + a[j].toString() + "\n");
}
System.exit(0);
}else if(selection.equals("no")){
System.exit(0);
}
}
}