pairs

Pairs.java

@@ -0,0 +1,60 @@
+import java.util.Scanner;
+
+public class Pairs {
+    int[] nums;
+
+    public Pairs(int... nums) {
+        this.nums = nums;
+    }
+
+    public String howManyPairs() {
+        int count = 0;
+        for (int i = 0; i < nums.length; i++) {
+            int num = nums[i];
+            for (int j = i + 1; j < nums.length; j++) {
+                if (num == nums[j]) {
+                    count++;
+                }
+            }
+        }
+        if (count != 2) {
+            return "There are not 2 pairs.";
+        } else {
+            return "There are 2 pairs.";
+        }
+    }
+
+    public int[] sort() {
+        int[] sorted = new int[nums.length];
+        for (int i = 0; i < nums.length; i++) {
+            int num = nums[i];
+            int j = i - 1;
+            while (j >= 0 && sorted[j] > num) {
+                sorted[j + 1] = sorted[j];
+                j--;
+            }
+            sorted[j + 1] = num;
+        }
+        return sorted;
+    }
+
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        int n1, n2, n3, n4;
+
+        System.out.print("Enter integer 1: ");
+        n1 = in.nextInt();
+        System.out.print("Enter integer 2: ");
+        n2 = in.nextInt();
+        System.out.print("Enter integer 3: ");
+        n3 = in.nextInt();
+        System.out.print("Enter integer 4: ");
+        n4 = in.nextInt();
+
+        Pairs p = new Pairs(n1, n2, n3, n4);
+
+        System.out.print("Sorted: " + p.sort()[0] + " " + p.sort()[1] + " " + p.sort()[2] + " " + p.sort()[3]);
+        System.out.print("\t\t" + p.howManyPairs());
+
+    }
+}

carTester.java

@@ -1,4 +1,4 @@
-public class carTester {
+public class CarTester {
     public static void main(String[] args) {
         Car car = new Car(50);
         car.addGas(20);