Exception in thread "main" java.util.NoSuchElementException: No line found
	at java.base/java.util.Scanner.nextLine(Scanner.java:1651)
	at System.Main.main(Main.java:14)

IDE: Eclipse IDE 2021-06 (4.20.0)

Java Version: JDK 17

Related Code:

package System;

import java.util.Scanner;

public class CmdRegister implements Command {
	public CmdRegister() {}
	
	public String[] getParamList() {
		Scanner in = new Scanner(System.in);
		String[] paramList = new String[2];
		System.out.print("Username:");
		paramList[0] = in.nextLine();
		System.out.print("Password:");
		paramList[1] = in.nextLine();
		in.close();
		return paramList; 
	}
	
	public void execute(Role role, String[] paramList) {
		if(paramList!=null&&role.canRegister()) {
			ManagementPortal managementPortal = ManagementPortal.getInstance();
			managementPortal.register(paramList[0], paramList[1]);
		}
		else if(paramList==null) {}
		else {
			System.out.print("Logged in user cannot register.\n");
		}	
	}
}

package System;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		ManagementPortal managementPortal = ManagementPortal.getInstance();
		boolean onGoing = true;
		Scanner in = new Scanner(System.in);
		while (onGoing) {
			managementPortal.printOpeningMessage();
			System.out.println("Please input command:");
			String command = in.nextLine();
			String[] cmdList = command.split(" ");
			if (cmdList[0].equals("Reg")) {
				CmdRegister cmd = new CmdRegister();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("Info")) {
				CmdCheckUserInfo cmd = new CmdCheckUserInfo();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("ChngPlan")) {
				CmdChangeUserPlan cmd = new CmdChangeUserPlan();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("PayHis")) {
				CmdCheckPersonalPaymentHistory cmd = new CmdCheckPersonalPaymentHistory();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("SignOut")) {
				CmdSignOut cmd = new CmdSignOut();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("TopUp")) {
				CmdTopUp cmd = new CmdTopUp();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("ResInd")) {
				CmdReserveIndividualSpace cmd = new CmdReserveIndividualSpace();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("CanRes")) {
				CmdCancelReserveRecord cmd = new CmdCancelReserveRecord();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("BuyPac")) {
				CmdBuyPackage cmd = new CmdBuyPackage();
				String[] paramList = cmd.getParamList();
				cmd.execute(managementPortal.getCurrentUserRole(), paramList);
			}
			else if(cmdList[0].equals("Exit")) {
				onGoing=false;
			}
			else {
				System.out.print("Sorry your command abbreviation cannot be recognized.\n"
						+ "Please make sure it's exactly the same with the abbreviation name.\n");
			}
		}
		System.out.println("Exit sucessfully!");
	}

}