Lists in Java

February 18, 2022 Java

In this post, you will learn how to work with lists so that you can use that same knowledge and thus evolve.

a list is an ordered set of values and is much easier to manipulate than an array;
the values that make up a list are called elements (just like in arrays).

package com.caffeinealgorithm.programminginjava;

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

public class Lists {
  public void Run() {
    List<String> colors = new ArrayList<>();

    colors.add("Blue");
    colors.add("Green");
    colors.add("Yellow");
    colors.add("Red");
    colors.add("Orange");

    colors.remove("Orange");
    // colors.clear();

    System.out.printf("Number of colors: %d\n", colors.size()); // Number of colors: 4
    System.out.printf("First color: %s\n", colors.get(0)); // First color: Blue
    System.out.printf("Last color: %s", colors.get(colors.size() - 1)); // Last color: Red
  }
}

Don’t forget to watch the video and you can always read this post in Portuguese.

Lists in Java

Happy coding!