我制作了一个询问全名，地址等的程序，我希望该程序检测两个全名是否相同。我已经有了if else语句来检测全名是否相同，但是我在返回部分不断出错。我想再次返回名称输入过程，但是程序继续转到我想要的地址输入。
示例输出
1。您的名字：杰里科
1。您的中间名：Manarang
1。您的姓氏：Navarro
输入barangay .... etc
2。您的名字：杰里科
2。您的中间名：Manarang
2。您的姓氏：Navarro
（错误，请重试）
2。您的名字：
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("How many names do you like to enter? ");
int user = input.nextInt();
String DATA[][][] = new String[user][4][3];
for(int x=0;x<user;x++){
System.out.print("\n" + (x+1) +".Enter your first name: ");
DATA[x][0][0] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your midle name: ");
DATA[x][0][1] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your last name: ");
DATA[x][0][2] = new Scanner(System.in).nextLine();
for(int y=0;y<user;y++){
if(x == y){
}
else if(DATA[x][0][0].equals(DATA[y][y][0]) && DATA[x][0][1].equals(DATA[y][y][1]) && DATA[x][0][2].equals(DATA[y][y][2])){
System.out.println("Ops! Your name is already inputed.");
System.out.println("Please Try again.");
x-=1;
break;
}
}
System.out.print("\n" +(x+1) +".Enter your barangay: ");
DATA[x][1][0] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your city: ");
DATA[x][1][1] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your province: ");
DATA[x][1][2] = new Scanner(System.in).nextLine();
System.out.print("\n" +(x+1) +".Enter your mailing address: ");
DATA[x][2][0] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your contact number: ");
DATA[x][2][1] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your email address: ");
DATA[x][2][2] = new Scanner(System.in).nextLine();
System.out.print("\n" +(x+1) +".Enter your elementary school: ");
DATA[x][3][0] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your secondary school: ");
DATA[x][3][1] = new Scanner(System.in).nextLine();
System.out.print((x+1) +".Enter your tertiary: ");
DATA[x][3][2] = new Scanner(System.in).nextLine();
}
}
}
答案 0 :(得分：1)
此代码有很多问题。这根本不是实现此目的的好方法。但是，由于您是新手，并且仍然在使用Java，因此现在您可以对代码进行这样的更改，并使它正常工作。
import java.util.Scanner;
public class Main {
static boolean flag;
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("How many names do you like to enter? ");
int user = input.nextInt();
String DATA[][][] = new String[user][4][3];
for (int x = 0; x < user; x++) {
flag = false;
System.out.print("\n" + (x + 1) + ".Enter your first name: ");
DATA[x][0][0] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your midle name: ");
DATA[x][0][1] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your last name: ");
DATA[x][0][2] = new Scanner(System.in).nextLine();
for (int y = 0; y < user; y++) {
if (x == y) {
} else if (DATA[x][0][0].equals(DATA[y][y][0]) && DATA[x][0][1].equals(DATA[y][y][1]) && DATA[x][0][2].equals(DATA[y][y][2])) {
System.out.println("Ops! Your name is already inputed.");
System.out.println("Please Try again.");
x -= 1;
flag = true;
break;
}
}
if (flag){
continue;
}
System.out.print("\n" + (x + 1) + ".Enter your barangay: ");
DATA[x][1][0] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your city: ");
DATA[x][1][1] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your province: ");
DATA[x][1][2] = new Scanner(System.in).nextLine();
System.out.print("\n" + (x + 1) + ".Enter your mailing address: ");
DATA[x][2][0] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your contact number: ");
DATA[x][2][1] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your email address: ");
DATA[x][2][2] = new Scanner(System.in).nextLine();
System.out.print("\n" + (x + 1) + ".Enter your elementary school: ");
DATA[x][3][0] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your secondary school: ");
DATA[x][3][1] = new Scanner(System.in).nextLine();
System.out.print((x + 1) + ".Enter your tertiary: ");
DATA[x][3][2] = new Scanner(System.in).nextLine();
}
}
}
再次使用它来破解此代码。这不是正确的方法。您必须重构整个代码才能正确完成它。 ：）
答案 1 :(得分：1)
同意沙。对我来说，最好提供替代方法，因为阅读您的解决方案确实很困难。这是我的报价。我认为这可能对您更清楚。 P.S。。在超过15年的发展过程中，我遇到了多次使用2D以上阵列的问题。不要使用class而不是3D ...数组。
private static final class User {
private final String firstName;
private final String middleName;
private final String lastName;
private String barangay;
private String city;
private String province;
private String mailingAddress;
private String contactNumber;
private String email;
private String elementarySchool;
private String secondarySchool;
private String tertiary;
public User(String firstName, String middleName, String lastName) {
this.firstName = firstName;
this.middleName = middleName;
this.lastName = lastName;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof User))
return false;
User user = (User)obj;
return Objects.equals(firstName, user.firstName) && Objects.equals(middleName, user.middleName)
&& Objects.equals(lastName, user.lastName);
}
@Override
public int hashCode() {
return Objects.hash(firstName, middleName, lastName);
}
}
private static User getUser(Scanner scan, int i) {
System.out.print("\n" + i + ". Enter your first name: ");
String firstName = scan.next();
System.out.print(i + ". Enter your middle name: ");
String middleName = scan.next();
System.out.print(i + ". Enter your last name: ");
String lastName = scan.next();
return new User(firstName, middleName, lastName);
}
private static User getUserAdditionalInfo(User user, Scanner scan, int i) {
System.out.print("\n" + i + ". Enter your barangay: ");
user.barangay = scan.nextLine();
System.out.print(i + ". Enter your city: ");
user.city = scan.nextLine();
System.out.print(i + ". Enter your province: ");
user.province = scan.nextLine();
System.out.print("\n" + i + ". Enter your mailing address: ");
user.mailingAddress = scan.nextLine();
System.out.print(i + ". Enter your contact number: ");
user.contactNumber = scan.nextLine();
System.out.print(i + ". Enter your email address: ");
user.email = scan.nextLine();
System.out.print("\n" + i + ". Enter your elementary school: ");
user.elementarySchool = scan.nextLine();
System.out.print(i + ". Enter your secondary school: ");
user.secondarySchool = scan.nextLine();
System.out.print((i + 1) + ".Enter your tertiary: ");
user.tertiary = scan.nextLine();
return user;
}
private static Set<User> getUsers() {
try (Scanner scan = new Scanner(System.in)) {
System.out.print("How many names do you like to enter? ");
Set<User> users = new LinkedHashSet<>();
for (int i = 1, total = scan.nextInt(); i <= total; ) {
User user = getUser(scan, i);
if (users.contains(user)) {
System.out.println("Ops! Your name is already inputed.");
System.out.println("Please Try again.");
} else {
users.add(getUserAdditionalInfo(user, scan, i));
i++;
}
}
return Collections.unmodifiableSet(users);
}
}
public static void main(String[] args) {
Set<User> users = getUsers();
}