Got rid of as many warnings as possible.

src/Car.java

@@ -18,12 +18,12 @@ public class Car{
 
     // default constructor
     Car(PApplet processing){
-        this.proc = processing;
+        proc = processing;
         slam = new SLAM(proc);
     }
 
     Car(PApplet processing, int xPos, int yPos, int carLength, int carWidth){
-        this.proc = processing;
+        proc = processing;
         slam = new SLAM(proc);
         this.pose = new PVector(xPos, yPos);
         this.carLength = carLength;

src/Processing.java

@@ -6,7 +6,7 @@ import java.util.ArrayList;
 public class Processing extends PApplet {
 
     Car car;
-    ArrayList<Wall> objects = new ArrayList<Wall>();
+    ArrayList<Wall> objects = new ArrayList<>();
 
     public static PApplet processing;
 

src/SLAM.java

@@ -5,7 +5,7 @@ import java.util.ArrayList;
 import static processing.core.PApplet.pow;
 
 public class SLAM{
-    ArrayList<PVector> points = new ArrayList<PVector>();
+    ArrayList<PVector> points = new ArrayList<>();
     private static PApplet proc;
 
     SLAM(PApplet processing){
@@ -33,7 +33,7 @@ class Line{
     }
 
     /**
-     * @brief attempt to find the line of best fit for the given points
+     * attempt to find the line of best fit for the given points
      * @param points the points to get the line of best for
      */
     Line(PApplet processing, ArrayList<PVector> points){

src/View.java

@@ -67,7 +67,7 @@ public class View{
 
     //gets the point that each ray has collided with
     public ArrayList<PVector> getPoints(){
-        ArrayList<PVector> points = new ArrayList<PVector>();
+        ArrayList<PVector> points = new ArrayList<>();
 
         for(Ray ray : rays){
             if(!Objects.equals(ray.getPoint(), new PVector(0, 0) {
@@ -102,7 +102,7 @@ class Ray{
     //checks to see at what coordinate the ray will collide with an object and sets the ray length to meet that point.
     public void castRay(ArrayList<Wall> objects){
         this.rayLength = defaultRayLength;
-        ArrayList<Integer> distances = new ArrayList<Integer>();
+        ArrayList<Integer> distances = new ArrayList<>();
         //sees what objects it collides with
         for(Wall object : objects){
             float theta1 = angle;
@@ -141,8 +141,7 @@ class Ray{
     public float getAngle(){return this.angle;}
 
     public boolean hasCollided(){
-        if(this.defaultRayLength != this.rayLength){return true;}
-        else{return false;}
+        return this.defaultRayLength != this.rayLength;
     }
 
     //returns the absolute position of the point