Array Lists Class Lesson Homework

• Hack 1
• Hack 2
• Hack 3

Hack 1

// HACK!!!!
// Create an arrayList and use one of the cool methods for it

import java.util.ArrayList; 

public class hack1 {
    public static void main (String[] args) {
        ArrayList<String>
        color.add(red); 
        color.add(blue); 
       
    }
}

hack1.main(null);

Hack 2

import java.util.ArrayList;

public class main{
    public static void main(String[] args) {
        ArrayList<String> color = new ArrayList<String>(); 
        color.add("red apple");
        color.add("green box");
        color.add("blue water");
        color.add("red panda");
        for (int i = 0; i < color.size(); i++) {
            if (color.get(i).contains("red")) {
                color.remove(i);
            }
        }

        for (int i = 0; i < color.size(); i++){
            System.out.println(color.get(i) + " ");
        }
    }

}

Hack 3

// Hack #3
// find the sum of the elements in the arraylist

ArrayList<Integer> num = new ArrayList<Integer>(); 

num.add(5);
num.add(1);
num.add(3);
int count = 0;

for ( int n : num) {
    count = count + n;
}

System.out.print(count);

9