package com.test;

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> animals = new ArrayList<>();
        animals.add("dog");
        animals.add("cat");
        animals.add("pig");
        System.out.println(animals); // [dog, cat, pig]
    }
}

package com.test;

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> animals = Arrays.asList("dog", "cat", "pig");
        System.out.println(animals); // [dog, cat, pig]
    }
}

System.out.println(animals.size()); // 3

 for (int i = 0; i < animals.size(); i++) {
     System.out.print(animals.get(i) + ","); // dog,cat,pig,
 }

animals.remove(1);
System.out.println(animals); // [dog, pig]

animals.clear();
System.out.println(animals); // []

Recommended Posts