Minor cleanup

Lab 1/Lab_1.java

@@ -23,6 +23,8 @@ public class Lab_1 {
             b = input.nextInt();
         } while (b > m);
 
+        input.close();
+
         if ((a <= 0) && (n >= 0)) {
             System.out.println("Error, division by zero, shutting down!");
             System.exit(1);

Lab 2/Lab_2.java

@@ -1,5 +1,4 @@
 import java.util.Scanner;
-import java.util.Arrays;
 
 public class Lab_2 {
 
@@ -23,7 +22,7 @@ public class Lab_2 {
     }
 
     public static void main(String[] args) {
-        short a, rows = 0, columns = 0, width;
+        short a, rows = 0, columns = 0;
         String format;
         
         Scanner input = new Scanner(System.in);