78. Subsets (java)

Author: bluesword12350

solution/0078.Subsets/Solution.java

@@ -0,0 +1,18 @@
+class Solution {
+    public List<List<Integer>> subsets(int[] nums) {
+        List<List<Integer>> list = new ArrayList<>();
+        for (int num : nums) {
+            int size = list.size();
+            for (int j = 0; j < size; j++) {
+                List<Integer> temp = new ArrayList<>(list.get(j));
+                temp.add(num);
+                list.add(temp);
+            }
+            List<Integer> one = new ArrayList<>();
+            one.add(num);
+            list.add(one);
+        }
+        list.add(new ArrayList<>());
+        return list;
+    }
+}