feat: java solution for leetcode-2022

Author: KGK-7

Convert 1D array to 2D array.java

@@ -0,0 +1,14 @@
+class Solution {
+    public int[][] construct2DArray(int[] original, int m, int n) {
+        if(original.length != m*n){
+            return new int [0][0];
+        }
+        int[][] result = new int[m][n];
+            for(int i=0; i<m ; i++){
+                for(int j=0; j<n ; j++){
+                    result[i][j] = original[i*n + j];
+                }
+            }
+        return result;
+    }
+}