Moved isNumPrime to MathTools and made Student static

1ano/2semestre/poo/src/aula03/Grades.java

@@ -31,9 +31,8 @@ public class Grades {
             System.out.printf("%5.1f  %5.1f  %5d\n", student.notaT, student.notaP, student.notaFinal);
         }
     }
-}
 
-class Student {
+    private static class Student {
         public double notaT;
         public double notaP;
         public int notaFinal;
@@ -43,4 +42,5 @@ class Student {
             this.notaP = notaP;
             this.notaFinal = (notaT < 7 || notaP < 7) ? 66 : (int) Math.round(0.4 * notaT + 0.6 * notaP);
         }
+    }
 }

1ano/2semestre/poo/src/aula03/PrimesSum.java

@@ -1,5 +1,6 @@
 package aula03;
 
+import utils.MathTools;
 import utils.UserInput;
 import java.util.Scanner;
 
@@ -14,20 +15,11 @@ public class PrimesSum {
 
         int sum = 0;
         for (int i = 0; i <= n; i++)
-            if (isNumPrime(i))
+            if (MathTools.isNumPrime(i))
                 sum += i;
 
         System.out.printf("A soma dos números primos até %d é %d\n", n, sum);
 
         sin.close();
     }
-
-    private static boolean isNumPrime(int n) {
-        if (n == 1)
-            return false;
-        for (int i = 2; i < n; i++)
-            if (n % i == 0)
-                return false;
-        return true;
-    }
 }

1ano/2semestre/poo/src/utils/MathTools.java

@@ -1,7 +1,23 @@
 package utils;
 
+import java.util.Random;
+
 public class MathTools {
     public static double round(double n, int places) {
         return (Math.round(n * Math.pow(10, places))) / Math.pow(10, places);
     }
+
+    public static double random(double minLimit, double maxLimit) {
+        Random rand = new Random();
+        return rand.nextDouble(minLimit, maxLimit);
+    }
+
+    public static boolean isNumPrime(int n) {
+        if (n <= 1)
+            return false;
+        for (int i = 2; i < n; i++)
+            if (n % i == 0)
+                return false;
+        return true;
+    }
 }