我制作了带菜单的交互式扫描仪。在主菜单选项1中，我希望用户输入名称或数字，然后在我的数组或ArrayList中搜索该特定值。如果找到，我想返回同一数组中的所有值，并打印到扫描仪。
我一直在一天的大部分时间里努力完成这项工作。 （请回答，就像您会成为新手一样）是我;）
我的主要：
String[] employee1Array = {fitnessEmployee1.getName() + " ", fitnessEmployee1.getCPR() + " ", String.valueOf(fitnessEmployee1.getHours()) + " ", String.valueOf(fitnessEmployee1.getSalary()) + " ", fitnessEmployee1.getVacation()};
String[] employee2Array = {fitnessEmployee2.getName() + " ", fitnessEmployee2.getCPR() + " ", String.valueOf(fitnessEmployee2.getHours()) + " ", String.valueOf(fitnessEmployee2.getSalary()) + " ", fitnessEmployee2.getVacation()};
String[] employee3Array = {fitnessEmployee3.getName() + " ", fitnessEmployee3.getCPR() + " ", String.valueOf(fitnessEmployee3.getHours()) + " ", String.valueOf(fitnessEmployee3.getSalary()) + " ", fitnessEmployee3.getVacation()};
String[] employee4Array = {fitnessEmployee4.getName() + " ", fitnessEmployee4.getCPR() + " ", String.valueOf(fitnessEmployee4.getHours()) + " ", String.valueOf(fitnessEmployee4.getSalary()) + " ", fitnessEmployee4.getVacation()};
String[][] allEmployeesArray = {employee1Array,employee2Array,employee3Array,employee4Array};
Scanner login = new Scanner(System.in);
System.out.println("Please type in your username:");
String userName = login.nextLine();
if (userName.equals(userName1)) {
System.out.println("Welcome " + userName);
} else {
System.out.println("Incorrect User - limited choices available");
}
String userChoice;
Scanner input = new Scanner(System.in);
while(true){
System.out.println("----Available Choices----");
System.out.println(" Press 1 for search for a specific employee or member");
System.out.println(" Press 2 to exit");
System.out.println("\nPlease choose from the list:\n");
userChoice = input.next();
String answer = "null";
switch(userChoice){
case "1":
System.out.println("Please write the name or CPR of the person you are searching for." );
answer = input.next();
System.out.println("Searching for " + answer);
for (int i = 0; i < allEmployeesArray.length; i++) {
System.out.println();
if (allEmployeesArray[i].equals(answer)) {
System.out.println(Arrays.toString(allEmployeesArray[i]));
}else{
System.out.println("Person not found");
}
}
System.out.println();
System.out.println("done with job number 1");
break;
case "2":
//Afslut scanneren
System.out.println("Exiting...");
System.exit(0);
default:
System.out.println("That is not a valid choice. Please try again...");
}
}
}
}
我通过创建重复事物的函数/方法在某种程度上简化了您的FitnessMain。请注意，由于引起混乱，我将FitnessEmployees类重命名为FitnessEmployee。以下是工作程序：
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;
public class FitnessMain {
public static void udskrivArray(String[][] a) {
for (int row = 0; row < a.length; row++) {
System.out.println();
for (int column = 0; column < a[row].length; column++) {
System.out.print(a[row][column] + " ");
}
}
}
public static void udskrivArray2(String[][] a) {
for (int row = 0; row < a.length; row++) {
System.out.println();
for (int column = 0; column < 2; column++) {
System.out.print(a[row][column] + " ");
}
}
}
static void printEmployee(FitnessEmployee employee) {
System.out.printf("%-12s", employee.getName());
System.out.printf("%-14s", employee.getCPR());
System.out.printf("%-12d", employee.getHours());
System.out.printf("%-12s", employee.getSalary());
System.out.printf("%-3s", employee.getVacation());
}
static String[] getMemberArray(FitnessMember fitnessMember) {
String[] memberFieldsArr = { fitnessMember.getName(), fitnessMember.getCPR(), fitnessMember.getMemberType(),
String.valueOf(fitnessMember.getFee()) };
return memberFieldsArr;
}
static String[] getEmployeeArray(FitnessEmployee employee) {
String[] employeeFieldsArray = { employee.getName(), employee.getCPR(), String.valueOf(employee.getHours()),
String.valueOf(employee.getSalary()), employee.getVacation() };
return employeeFieldsArray;
}
public static void main(String[] args) {
int salaryAdmin = 23000;
int salaryInstructor = 456;
int hoursTove = 20;
int hoursHenning = 15;
// Employees data
FitnessEmployee fitnessEmployee1 = new FitnessEmployee("Claus", "221175-1011", 37, salaryAdmin, "5",
"Administrative");
FitnessEmployee fitnessEmployee2 = new FitnessEmployee("Tove", "011080-1014", 20,
salaryInstructor * hoursTove, "", "Instructor");
FitnessEmployee fitnessEmployee3 = new FitnessEmployee("Anna", "011080-1012", 37, (salaryAdmin), "5",
"Administrative");
FitnessEmployee fitnessEmployee4 = new FitnessEmployee("Henning", "011080-1015", 20,
(salaryInstructor * hoursHenning), " ", "Instructor");
// Members data
FitnessMember fitnessMembers1 = new FitnessMember("Morten", "130195-1303", "Full", 299, 1);
FitnessMember fitnessMembers2 = new FitnessMember("Martin", "221175-1011", "Basic", 199, 2);
FitnessMember fitnessMembers3 = new FitnessMember("Martina", "050970-1409", "Full", 299, 3);
FitnessMember fitnessMembers4 = new FitnessMember("Marcel", "221175-1012", "Basic", 199, 4);
System.out.println("FITNESS EMPLOYEES \n");
System.out.printf("%-12s", "Name");
System.out.printf("%-14s", "CPR");
System.out.printf("%-12s", "Hours");
System.out.printf("%-12s", "Salary");
System.out.printf("%-3s", "Vacation\n");
System.out.println();
for (int i = 0; i < 62; i++) {
System.out.print("*");
}
System.out.println();
printEmployee(fitnessEmployee1);
printEmployee(fitnessEmployee2);
printEmployee(fitnessEmployee3);
printEmployee(fitnessEmployee4);
// Array of some employees
String[] employee1Array = getEmployeeArray(fitnessEmployee1);
String[] employee2Array = getEmployeeArray(fitnessEmployee2);
String[] employee3Array = getEmployeeArray(fitnessEmployee3);
String[] employee4Array = getEmployeeArray(fitnessEmployee4);
String[][] allEmployeesArray = { employee1Array, employee2Array, employee3Array, employee4Array };
System.out.println();
for (int i = 0; i < 45; i++) {
System.out.print("=");
}
System.out.println();
System.out.println("\n\n\nFITNESS MEMBERS");
System.out.printf("%-12s", "Name");
System.out.printf("%-14s", "CPR");
System.out.printf("%-12s", "Member type");
System.out.printf("%-12s", "Fee");
System.out.println();
for (int i = 0; i < 62; i++) {
System.out.print("*");
}
System.out.println();
String[] member1Array = getMemberArray(fitnessMembers1);
String[] member2Array = getMemberArray(fitnessMembers2);
String[] member3Array = getMemberArray(fitnessMembers3);
String[] member4Array = getMemberArray(fitnessMembers4);;
ArrayList<String[]> fitnessMembersArrayList = new ArrayList<>();
fitnessMembersArrayList.add(member1Array);
fitnessMembersArrayList.add(member2Array);
fitnessMembersArrayList.add(member3Array);
fitnessMembersArrayList.add(member4Array);
String[][] allMembersArray = { member1Array, member2Array, member3Array, member4Array };
udskrivArray(allMembersArray);
System.out.println("\n");
for (int i = 0; i < 45; i++) {
System.out.print("=");
}
System.out.println("\n\n\nEMPLOYEES & MEMBERS Name and cpr");
System.out.printf("%-12s", "Name");
System.out.printf("%-14s", "CPR");
System.out.println();
for (int i = 0; i < 62; i++) {
System.out.print("*");
}
udskrivArray2(allEmployeesArray);
udskrivArray2(allMembersArray);
System.out.println("\n");
System.out.println();
String userName1 = "Faisal";
Scanner login = new Scanner(System.in);
System.out.println("Please type in your username:");
String userName = login.nextLine();
if (userName.equals(userName1)) {
System.out.println("Welcome " + userName);
} else {
System.out.println("Incorrect User - limited choices available");
}
String userChoice; // variable som opbevarer det indtastede
Scanner input = new Scanner(System.in);
// loop menuen indtil brugeren vælger at afslutte
while (true) {
// Vis valgmulighederne
System.out.println("----Available Choices----");
System.out.println(" Press 1 for search for a specific employee or member");
System.out.println(" Press 2 to list and count all employees (CPR)");
System.out.println(" Press 3 to list the current salaries of all the employees");
System.out.println(" Press 4 to exit");
System.out.println("\nPlease choose from the list:\n");
userChoice = input.next();
String answer = "";
switch (userChoice) {
case "1":
System.out.println("Please write the name or CPR of the person you are searching for.");
answer = input.next();
System.out.println("Searching for " + answer);
boolean found=false;
String[] employeeFields = null;
for (int i = 0; i < allEmployeesArray.length; i++) {
System.out.println();
if (allEmployeesArray[i][0].equals(answer)) {
found=true;
employeeFields=allEmployeesArray[i];
break;
}
}
if(found)
System.out.println(Arrays.toString(employeeFields));
else
System.out.println("Person not found");
System.out.println();
System.out.println("done with job number 1");
break;
case "2":
String[] currentEmployees = { fitnessEmployee1.getCPR(), fitnessEmployee2.getCPR(),
fitnessEmployee3.getCPR(), fitnessEmployee4.getCPR() };
System.out.println("We currently have " + currentEmployees.length + " employees (Listed by CPR).");
System.out.println(Arrays.toString(currentEmployees));
System.out.println("\nPlease make your next choice\n");
break;
case "3":
int[] employeesSalary = { fitnessEmployee1.getSalary(), fitnessEmployee2.getSalary(),
fitnessEmployee3.getSalary(), fitnessEmployee4.getSalary() };
System.out.println("These are the current salaries of our employees:");
for (int i = 0; i < employeesSalary.length; i++) {
System.out.println(+employeesSalary[i]);
}
System.out.println("\nPlease make your next choice\n");
break;
case "4":
// Afslut scanneren
System.out.println("Exiting...");
System.exit(0);
default:
System.out.println("That is not a valid choice. Please try again...");
}
}
}
}
[要查看对象是否在列表中，可以使用所有列表实现的.contains()函数，该函数扩展了Java列表接口（例如Arraylist）。
所以您可以这样做：
if(list.contains(object){
//Print items
}
对于数组，您可以使用for循环对其进行迭代，也可以使用以下方法在数组之外创建一个列表：>
Arrays.toList(yourArray)然后执行与列表相同的操作。