Pairs with array by @AlexU238

DuosForSums.java

@@ -0,0 +1,49 @@
+import java.util.Arrays;
+
+public class DuosForSums {
+
+    public static void main(String[] args) {
+        int[] initArr = {1, 3, 5, -2, 6, 0, -3, -1, 7, 2};
+        int sumNum = 5;
+        group(initArr, sumNum);
+
+    }
+
+    private static void group(int[] arr, int x) {
+        Arrays.sort(arr);
+
+        int[][] tmp = new int[arr.length][2];
+
+        int first = 0;
+        int last = arr.length - 1;
+
+        int i = 0;
+
+        while (first < last) {
+
+            int sumTmp = arr[first] + arr[last];
+            if (sumTmp == x) {
+                tmp[i][0] = arr[first];
+                tmp[i][1] = arr[last];
+                first++;
+                last--;
+                i++;
+            } else {
+                if (sumTmp < x) first++;
+                else last--;
+            }
+        }
+
+        int[][] pairs = new int[i][2];
+        for (int g = 0; g < i; g++) {
+            if (tmp[g][0] + tmp[g][1] == x) {
+                pairs[g][0] = tmp[g][0];
+                pairs[g][1] = tmp[g][1];
+            } else break;
+        }
+
+        System.out.println(Arrays.deepToString(pairs));
+
+    }
+
+}