java Arraylist可打印具有计数的对象

Question

这是我的密码

ArrayList<Restaurant> restaurant= new ArrayList<Restaurant>(); 

在餐厅内上课

@Override
public String toString() {
    int i=1;
    return "\n"+(i++)+". "+this.restaurantName + 
           "\t\t"+this.location;
}

我想这样印刷

[ 1. pizzahut bangalore, 2. dominos delhi]

而是打印

[ 1. pizzahut bangalore, 1. dominos delhi]

需要代码方面的帮助

Answer 1

ArrayList<Restaurant> restaurantList= new ArrayList<Restaurant>(); 

// your login to insert the elements in the array list 

// iterate list
int index=1;
for(Restaurant r : restaurantList){
    System.out.println(String.valueOf(index++)+": "+ r);
}

在餐厅内上课

@Override
public String toString() {
    return this.restaurantName + "\t\t"+this.location;
}

Answer 2

这是另一个解决方案，我不确定您有什么实际问题，所以请提供另一个可能的解决方案。这可能对你有用

public class Restaurant {

    static int index = 1;
    String restaurantName;
    String location;
    int curIndex;

    Restaurant(final String restaurantName, final String location) {
        this.restaurantName = restaurantName;
        this.location = location;
        this.curIndex = index++;
    }

    public static void main(final String[] input) {
        final ArrayList<Restaurant> restaurant = new ArrayList<Restaurant>();
        restaurant.add(new Restaurant("pizzahut", "bangalore"));
        restaurant.add(new Restaurant("dominos", "delhi"));

        restaurant.forEach(r -> System.out.println(r));
    }

    public String toString() {
        return "\n" + curIndex + ". " + this.restaurantName +
                "\t\t" + this.location;
    }
}