Unit 7 Homework (Hacks & Quizizz))

// HACK 1 - 
// 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<Boolean> asdf = new ArrayList();
       asdf.add(true);
       asdf.add(false);
       array(asdf);
    }
    public static void array(ArrayList arr){
        if (arr.size()>0){
            arr.set(0, "This is an array list");
            System.out.println(arr.get(0));
        }
    }
}

hack1.main(null);

This is an array list

// Hack 2
import java.util.ArrayList;

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);
    }
}

System.out.println(color);
/*/ 
using 

if(color.get(i).contains("red"))

iterate through the arraylist and remove all elements that contain the word red in them
/*/

[green box, blue water]

// 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 a = num.get(0);
int b = num.get(1);
int c = num.get(2);

int sum = a + b + c;
System.out.println(sum);

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