Ich habe den folgenden Code und möchte den Benutzer nach einem Namen fragen, der bereits in der Arraylist gespeichert ist und das (Hunde-) Alter um +1 erhöht.Wie bekomme ich eine String-Benutzereingabe und erhöht den Wert um +1 mit Java ArrayList?
Hier ist der wichtigste (ich denke) Teil des Codes. Dies ist die Registerklasse.
import java.util.Scanner;
import java.util.ArrayList;
public class Register {
private Scanner keyboard = new Scanner(System.in);
private ArrayList<Dog> dogs = new ArrayList<>();
private String readString() {
return keyboard.nextLine();
}
public int readInt() {
int i = keyboard.nextInt();
keyboard.nextLine();
return i;
}
public double readDouble() {
double d = keyboard.nextDouble();
keyboard.nextLine();
return d;
}
public void registrateDog(){
System.out.println("Dogs name: ");
String name = readString();
System.out.println("Dogs breed: ");
String breed = readString();
System.out.println("Dogs age: ");
int age = readInt();
System.out.println("Dogs weight: ");
double weight = readDouble();
Dog newDog = new Dog(name, breed, age, weight);
dogs.add(newDog);
System.out.println(newDog.toString() + " is added");
}
public void increaseAge(){ //Here's the problem
System.out.print("Enter dog who has aged: ");
String newDogAge = readString();
int addAge = 1;
for (int i = 0; i < dogs.size(); i++) {
if(dogs.get(i).getName().equals(newDogAge))
addAge = (dogs.get(i).getAge());
dogs.set(i, dogs.get(i));
System.out.println("Dog " + newDogAge + " is now " + addAge);
return;
}
}
private void exitProgram(){
System.out.println("Goodbye!");
keyboard.close();
}
private void run(){
setUp();
runCommandLoop();
exitProgram();
}
public static void main(String[] args){
new Register().run();
//setUp();
}
}
Und
public class Dog {
private String name;
private String breed;
private int age;
private double weight;
private double tailLenght;
private String tax = "tax";
public Dog(String name, String breed, int age, double weight){
this.name = name;
this.breed = breed;
this.age = age;
this.weight = weight;
if (breed.equals(tax)) {
this.tailLenght = 3.7;
} else {
this.tailLenght = (age*weight)/10;
}
}
public String getName(){
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBreed(){
return breed;
}
public int getAge(){
return age;
}
public void setAge(int age){
this.age = age;
}
public int newAge(){
return age = age + 1;
}
public double getWeight(){
return weight;
}
public double getTailLenght(){
return tailLenght;
}
public String toString()
{ return String.format("%s, %s, %d years old, %.1f kg, "
+ "tail lenght %.1f cm", name, breed, age, weight, tailLenght);
}
}
Was ist das Problem? Irgendeine Fehlermeldung? – Robert
Ich erinnere mich an diese Frage von vor ein paar Tagen, vielleicht müssen Sie nur besser suchen. – Robert