//TestEmployeesProgram driver with menu & object array.
import java.util.*;
public class TestEmployeesProgram {
public static Scanner console = new Scanner(System.in);
public static void main(String[] args)
{
final int MAX = 7;
Employee employee[] = new Employee[MAX];
int choice,k;
String name;
boolean notFound;
employee[1] = new Manager("Joe Bloggs","gdr",4,32.5);
employee[2] = new Admin("Mary Jennings","nnv",35.3,88.5,34.3);
employee[3] = new Clerk("Brian Jones","bbl",42.4,78.5,23.5,45.3);
employee[4] = new Manager("John Bloggs","gvr",5,33.5);
employee[5] = new Admin("Bridget Jennings","nvv",45.3,98.5,36.3);
employee[6] = new Clerk("Jack Jones","bbb",43.4,78.5,23.5,47.3);
//Initial Read
choice = showMenu();
//Continue Until 4/Exit
while (choice != MAX)
{
switch (choice)
{
case 1://Manager
System.out.println();
System.out.printf("%s %-16s %-10s %6s","Name","Id","Hours Worked","Pay");
System.out.println("\n==================================================");
for (k = 0; k < MAX; ++k)
{
if (employee[k] instanceof Manager){ //use of string method instance of.
System.out.println(employee[k].toString());
}
}
break;
case 2://Administration
System.out.println();
System.out.printf("%s %-16s %-10s %6s %-19s","Name","Id","Hours Worked","Pay","Admin Quota");
System.out.println("\n==================================================");
for (k = 0; k < MAX; ++k)
{
if (employee[k] instanceof Admin){
System.out.println(employee[k].toString());
}
}
break;
case 3://Clerk
System.out.println();
System.out.printf("%s %-16s %-10s %6s %-19s","Name","Id","Hours Worked","Pay","Admin Quota","Units Sold");
System.out.println("\n==================================================");
for (k = 0; k < MAX; ++k)
{
if (employee[k] instanceof Clerk){
System.out.println(employee[k].toString());
}
}
break;
switch ステートメントのこのケースでは、NullPointerException. すべてをチェックして、正しく初期化されているかどうかを確認しましたが、問題が見つからないようです。また、名前が見つからない場合、検索機能は名前検索をバイパスしてデフォルトのメッセージを取得します。いくつかのガイダンスをいただければ幸いです。
case 4://Name search
System.out.print("Enter employee name: ");
name = console.nextLine();
k = -1;
notFound = true;
while ((k < MAX-1) && (notFound))
{
++k;
if (name == employee[k].getName()){
System.out.println();
System.out.printf("%s %-16s %-10s %6s %-19s","Name","Id","Hours Worked","Pay","Admin Quota","Units Sold");
System.out.println("\n==================================================");
System.out.println(employee[k].toString());
System.out.println();
notFound = false;
}
}//end of case 4 while.
if (notFound){
System.out.println("Employee name not found\n");
}
break;
case 7://exit
System.out.println("Program exiting...");
System.exit(0);
default:
System.out.println("Invalid menu choice 1..3 of 7 to Exit");
}//end of switch
//sub read
choice = showMenu();
}//end of while
}//end of main
//Menu method for employee selection.
public static int showMenu()
{
int choice;
System.out.println();
System.out.println("Employee Program Menu");
System.out.println("1.Show Manager pay details ");
System.out.println("2.Show Admin pay details ");
System.out.println("3.Show Clerk pay details ");
System.out.println("4.Search by employee name ");
System.out.println("7.Exit");
System.out.print("Enter option: ");
choice = console.nextInt();
return choice;
}
}