Initial data commit

Task/Identity-matrix/Java/identity-matrix.java

@@ -0,0 +1,13 @@
+public class PrintIdentityMatrix {
+
+    public static void main(String[] args) {
+        int n = 5;
+        int[][] array = new int[n][n];
+
+        IntStream.range(0, n).forEach(i -> array[i][i] = 1);
+
+        Arrays.stream(array)
+                .map((int[] a) -> Arrays.toString(a))
+                .forEach(System.out::println);
+    }
+}