Jetbrains Academy Java：程序 运行 没有输入。您尝试阅读的内容超出预期
Jetbrains Academy Java: Program ran out of input. You tried to read more, than expected
Jetbrains Academy Java“项目：Cinema Room Manager”在第 4/5 阶段抛出一个不清楚的错误 Program ran out of input. You tried to read more, than expected....。 Java 堆栈跟踪是：
at org.hyperskill.hstest.stage.StageTest.start(StageTest.java:131)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:119)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
at java.base/java.lang.Thread.run(Thread.java:834)
源代码
SeatPlanning.java
package cinema;
import java.util.Scanner;
public class SeatPlanning {
private int rows;
private int seatsPerRow;
private String[][] seats;
private final Scanner s;
public SeatPlanning() {
s = new Scanner(System.in);
}
public int getTicketPrice(int row) {
int totalSeats = rows * seatsPerRow;
if (totalSeats <= 60) {
return 10;
} else {
int frontRows = (int) Math.floor((double) rows / 2);
return (row <= frontRows) ? 10 : 8;
}
}
public void printTicketPrice(int row) {
System.out.printf("Ticket price: $%d\n", getTicketPrice(row));
}
private void printInputRequest(String str) {
System.out.printf("%s\n", str);
System.out.print("> ");
}
public void launch() {
printInputRequest("Enter the number of rows:");
rows = s.nextInt();
printInputRequest("Enter the number of seats in each row:");
seatsPerRow = s.nextInt();
initSeats();
printMenu();
}
private void initSeats() {
this.seats = new String[rows][seatsPerRow];
for (int row = 0; row < rows; row++) {
for (int column = 0; column < seatsPerRow; column++) {
this.seats[row][column] = " S";
}
}
}
public void printSeats() {
System.out.print("\nCinema:\n ");
for (int column = 0; column < seatsPerRow; column++) {
System.out.printf(" %d", column + 1);
}
System.out.print("\n");
for (int row = 0; row < rows; row++) {
System.out.printf("%d", row + 1);
for (int column = 0; column < seatsPerRow; column++) {
System.out.print(seats[row][column]);
}
System.out.print("\n");
}
}
private void buySeat(int row, int column) {
this.seats[row - 1][column - 1] = " B";
printTicketPrice(row);
}
public void startBuySeatDialog() {
printInputRequest("Enter a row number:");
int row = s.nextInt();
printInputRequest("Enter a seat number in that row:");
int column = s.nextInt();
buySeat(row, column);
}
public void printMenu() {
printInputRequest("\n1. Show the seats\n" +
"2. Buy a ticket\n" +
"0. Exit");
evaluateMenuOption(s.nextInt());
}
private void evaluateMenuOption(int option) {
switch (option) {
case 0:
System.exit(0);
case 1:
this.printSeats();
this.printMenu();
break;
case 2:
this.startBuySeatDialog();
this.printMenu();
}
}
}
Cinema.java
package cinema;
public class Cinema {
public static void main(String[] args) {
SeatPlanning seatPlanning = new SeatPlanning();
seatPlanning.launch();
}
}
您可能使用 System.exit(0) 退出了导致问题的应用程序。
相反，使用 return 退出应用程序。
这是我对第 4/5 阶段的回答：
package cinema;
import java.util.Scanner;
public class Cinema {
static boolean withPrice = false;
static class Seat {
boolean occupied = false;
int price = 0;
public Seat(boolean occupied, int price) {
this.occupied = occupied;
this.price = price;
}
String print(boolean withPrice) {
if(withPrice) {
return String.format("%c (%02d)", (occupied == true) ? 'B' : 'S', price);
} else
return String.format("%c", (occupied == true) ? 'B' : 'S');
}
}
static int noOfRows;
static int noOfSeats;
static Seat[][] seats;
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the number of rows: \n> ");
noOfRows = scanner.nextInt();
System.out.print("Enter the number of seats in each row: \n> ");
noOfSeats = scanner.nextInt();
int income = 0;
if (noOfRows * noOfSeats <= 60) {
income = noOfRows * noOfSeats * 10;
} else {
income = (noOfRows / 2) * noOfSeats * 10 +
(noOfRows - (noOfRows / 2)) * noOfSeats * 8;
}
// System.out.println("Total income: \n$" + income);
//
// initialize seats
//
seats = new Seat[noOfRows][];
for(int currRow = 0; currRow < noOfRows; currRow++) {
seats[currRow] = new Seat[noOfSeats];
for(int currSeat = 0; currSeat < noOfSeats; currSeat++) {
int price = 0;
if (noOfRows * noOfSeats > 60 && currRow >= noOfRows / 2) {
price = 8;
} else {
price = 10;
}
seats[currRow][currSeat] = new Seat(false, price);
}
}
while (true) {
System.out.println();
System.out.println("1. Show the seats");
System.out.println("2. Buy a ticket");
System.out.print("0. Exit\n> ");
int menu = scanner.nextInt();
if(menu == 1) {
printCinemaRoom(withPrice);
} else if(menu == 2) {
System.out.print("Enter a row number: \n> ");
int reserveRow = scanner.nextInt() - 1;
System.out.print("Enter a seat number in that row: \n> ");
int reserveSeat = scanner.nextInt() - 1;
seats[reserveRow][reserveSeat].occupied = true;
System.out.println("Ticket price: $" + seats[reserveRow][reserveSeat].price);
} else if (menu == 0) {
break;
}
}
}
private static void printCinemaRoom(boolean withPrice) {
System.out.print("\nCinema:\n ");
for(int i = 0; i < noOfSeats; i++) {
System.out.printf(" %d", (i + 1) );
if(withPrice)
System.out.printf(" (%02d)", 0 );
}
System.out.println("");
for(int currRow = 0; currRow < noOfRows; currRow++) {
// print row number
System.out.print((currRow + 1) + " ");
// print seats
for(int currSeat = 0; currSeat < noOfSeats; currSeat++) {
System.out.print(seats[currRow][currSeat].print(withPrice) + " ");
}
System.out.println();
}
}
}
Jetbrains Academy Java“项目：Cinema Room Manager”在第 4/5 阶段抛出一个不清楚的错误 Program ran out of input. You tried to read more, than expected....。 Java 堆栈跟踪是：
at org.hyperskill.hstest.stage.StageTest.start(StageTest.java:131)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:119)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
at java.base/java.lang.Thread.run(Thread.java:834)
源代码
SeatPlanning.java
package cinema;
import java.util.Scanner;
public class SeatPlanning {
private int rows;
private int seatsPerRow;
private String[][] seats;
private final Scanner s;
public SeatPlanning() {
s = new Scanner(System.in);
}
public int getTicketPrice(int row) {
int totalSeats = rows * seatsPerRow;
if (totalSeats <= 60) {
return 10;
} else {
int frontRows = (int) Math.floor((double) rows / 2);
return (row <= frontRows) ? 10 : 8;
}
}
public void printTicketPrice(int row) {
System.out.printf("Ticket price: $%d\n", getTicketPrice(row));
}
private void printInputRequest(String str) {
System.out.printf("%s\n", str);
System.out.print("> ");
}
public void launch() {
printInputRequest("Enter the number of rows:");
rows = s.nextInt();
printInputRequest("Enter the number of seats in each row:");
seatsPerRow = s.nextInt();
initSeats();
printMenu();
}
private void initSeats() {
this.seats = new String[rows][seatsPerRow];
for (int row = 0; row < rows; row++) {
for (int column = 0; column < seatsPerRow; column++) {
this.seats[row][column] = " S";
}
}
}
public void printSeats() {
System.out.print("\nCinema:\n ");
for (int column = 0; column < seatsPerRow; column++) {
System.out.printf(" %d", column + 1);
}
System.out.print("\n");
for (int row = 0; row < rows; row++) {
System.out.printf("%d", row + 1);
for (int column = 0; column < seatsPerRow; column++) {
System.out.print(seats[row][column]);
}
System.out.print("\n");
}
}
private void buySeat(int row, int column) {
this.seats[row - 1][column - 1] = " B";
printTicketPrice(row);
}
public void startBuySeatDialog() {
printInputRequest("Enter a row number:");
int row = s.nextInt();
printInputRequest("Enter a seat number in that row:");
int column = s.nextInt();
buySeat(row, column);
}
public void printMenu() {
printInputRequest("\n1. Show the seats\n" +
"2. Buy a ticket\n" +
"0. Exit");
evaluateMenuOption(s.nextInt());
}
private void evaluateMenuOption(int option) {
switch (option) {
case 0:
System.exit(0);
case 1:
this.printSeats();
this.printMenu();
break;
case 2:
this.startBuySeatDialog();
this.printMenu();
}
}
}
Cinema.java
package cinema;
public class Cinema {
public static void main(String[] args) {
SeatPlanning seatPlanning = new SeatPlanning();
seatPlanning.launch();
}
}
您可能使用 System.exit(0) 退出了导致问题的应用程序。
相反，使用 return 退出应用程序。
这是我对第 4/5 阶段的回答：
package cinema;
import java.util.Scanner;
public class Cinema {
static boolean withPrice = false;
static class Seat {
boolean occupied = false;
int price = 0;
public Seat(boolean occupied, int price) {
this.occupied = occupied;
this.price = price;
}
String print(boolean withPrice) {
if(withPrice) {
return String.format("%c (%02d)", (occupied == true) ? 'B' : 'S', price);
} else
return String.format("%c", (occupied == true) ? 'B' : 'S');
}
}
static int noOfRows;
static int noOfSeats;
static Seat[][] seats;
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the number of rows: \n> ");
noOfRows = scanner.nextInt();
System.out.print("Enter the number of seats in each row: \n> ");
noOfSeats = scanner.nextInt();
int income = 0;
if (noOfRows * noOfSeats <= 60) {
income = noOfRows * noOfSeats * 10;
} else {
income = (noOfRows / 2) * noOfSeats * 10 +
(noOfRows - (noOfRows / 2)) * noOfSeats * 8;
}
// System.out.println("Total income: \n$" + income);
//
// initialize seats
//
seats = new Seat[noOfRows][];
for(int currRow = 0; currRow < noOfRows; currRow++) {
seats[currRow] = new Seat[noOfSeats];
for(int currSeat = 0; currSeat < noOfSeats; currSeat++) {
int price = 0;
if (noOfRows * noOfSeats > 60 && currRow >= noOfRows / 2) {
price = 8;
} else {
price = 10;
}
seats[currRow][currSeat] = new Seat(false, price);
}
}
while (true) {
System.out.println();
System.out.println("1. Show the seats");
System.out.println("2. Buy a ticket");
System.out.print("0. Exit\n> ");
int menu = scanner.nextInt();
if(menu == 1) {
printCinemaRoom(withPrice);
} else if(menu == 2) {
System.out.print("Enter a row number: \n> ");
int reserveRow = scanner.nextInt() - 1;
System.out.print("Enter a seat number in that row: \n> ");
int reserveSeat = scanner.nextInt() - 1;
seats[reserveRow][reserveSeat].occupied = true;
System.out.println("Ticket price: $" + seats[reserveRow][reserveSeat].price);
} else if (menu == 0) {
break;
}
}
}
private static void printCinemaRoom(boolean withPrice) {
System.out.print("\nCinema:\n ");
for(int i = 0; i < noOfSeats; i++) {
System.out.printf(" %d", (i + 1) );
if(withPrice)
System.out.printf(" (%02d)", 0 );
}
System.out.println("");
for(int currRow = 0; currRow < noOfRows; currRow++) {
// print row number
System.out.print((currRow + 1) + " ");
// print seats
for(int currSeat = 0; currSeat < noOfSeats; currSeat++) {
System.out.print(seats[currRow][currSeat].print(withPrice) + " ");
}
System.out.println();
}
}
}