Почему я получаю ошибку «Утечка ресурсов:», даже когда я использую метод close () в Java?
Я поместил весь код и использовал комментарии, где, где я получаю сообщение об ошибке и где я закрываю метод Сканера.
Я использую Eclipse, Java 13.
Вот код.
import java.util.*;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
public class VehicleTest {
public static void main(String[] args) {
VehicleTest vtest = new VehicleTest();
try {
vtest.menuLoop();
} catch(IOException e) {
System.out.println("IO Exception!");
System.exit(1);
} catch(CloneNotSupportedException e) {
System.out.println("CloneNotSupportedException");
System.exit(1);
}
}
private void menuLoop() throws IOException, CloneNotSupportedException {
Scanner scan = new Scanner(System.in);
ArrayList<Vehicle> arr=new ArrayList<Vehicle>();
Vehicle vehicle;
/** Deleted the hard coded adds so it doesn't add same types of cars
* everytime
*/
java.io.File file = new java.io.File("Vehicles.txt");
Scanner in = new Scanner(file).useLocale(Locale.US);
in.useDelimiter(","); //** This is where I get the resource leak error message **//
while (in.hasNext()) {
try {
String vehClass = in.next();
Class veh1 = Class.forName(vehClass);
Vehicle veh = (Vehicle)veh1.
getDeclaredConstructor().newInstance();
arr.add(veh);
veh.readData(in);
} catch (Exception e) {
System.out.print("Exception");
System.exit(0);
}
}
while(true) {
System.out.println("1...................................New car");
System.out.println("2...............................New bicycle");
System.out.println("3......................Find vehicle by name");
System.out.println("4..............Show data about all vehicles");
System.out.println("5.......Change direction of a given vehicle");
System.out.println("6.........................Test clone method");
System.out.println("7..................Test driveable interface");
System.out.println("8..............................Exit program");
System.out.println("...............................Your choice?");
int choice = scan.nextInt();
String name;
switch (choice) {
case 1:
arr.add(new Car());
vehicle = arr.get(arr.size() - 1);
try {
vehicle.setAllFields();
} catch(Exception e) {
System.out.println("Wrong input!");
System.exit(1);
}
break;
case 2:
arr.add(new Bicycle());
vehicle = arr.get(arr.size() - 1);
try {
vehicle.setAllFields();
} catch(Exception e) {
System.out.println("Wrong input!");
System.exit(1);
}
break;
case 3:
System.out.println("Name of vehicle: ");
name = scan.next();
for(Vehicle v : arr) {
if(v.getName() != null &&
(v.getName().compareToIgnoreCase(name) == 0)) {
System.out.println(v);
}
}
break;
case 4:
for(Vehicle v : arr) {
System.out.println(v);
}
break;
case 5:
System.out.println("Name of vehicle: ");
name = scan.next();
char dir;
int degree;
for(Vehicle v : arr) {
if(v.getName() != null &&
(v.getName().compareToIgnoreCase(name) == 0)) {
System.out.print("\nDirection [R/L]: ");
dir = scan.next().charAt(0);
System.out.print("\nDegrees [0-360]: ");
degree = scan.nextInt();
if (dir == 'L') { v.turnLeft(degree); }
if (dir == 'R') {v.turnRight(degree); }
}
}
break;
case 6:
Car car1 = new Car("A bad car","red",100000,1999,"A111",350,0);
Car car2 = (Car)car1.clone();
car2.getBuyingDate().set(2003, 1, 2);
car2.getProductionDate().set(2003, 5, 5);
System.out.println("Date objects are separate, deep copy");
System.out.printf("%n %tF", car1.getBuyingDate());
System.out.printf("%n %tF %n", car2.getBuyingDate());
System.out.printf("Production date car2 edited: "
+ "%n %tF %n", car2.getProductionDate());
break;
case 7:
Car carTest = new Car("Test car","red",100000,1999,
"A111",350,0);
Bicycle bicycleTest =
new Bicycle("Test bicycle","red",100000,
1999,"A111",15,0);
carTest.accelerate(3);
carTest.accelerate(250);
bicycleTest.accelerate(5);
bicycleTest.accelerate(200);
carTest.breaks(100);
bicycleTest.breaks(50);
carTest.stop();
bicycleTest.stop();
break;
case 8:
java.io.PrintWriter output = new java.io.PrintWriter(file);
for(Vehicle v : arr) {
v.writeData(output);
}
scan.close();
in.close(); //* **in.close() method is here**
output.close();
System.exit(0);
default:
System.out.println("Wrong input!");
}
}
}
}
Даже когда я вставляю .close () внутри блока try он все еще показывает ту же ошибку.
И он все еще показывает ту же ошибку, даже когда я вставляю in.close () сразу после.
Почему это так?