java oop : variable vs array

JavaOOP/src/Java05.java

@@ -0,0 +1,40 @@
+public class Java05 {
+    public static void main(String[] args) {
+        // 2차원 배열
+        int[][] a = new int[3][3];
+        a[0][0] = 1;
+        a[0][1] = 2;
+        a[0][2] = 3;
+
+        a[1][0] = 1;
+        a[1][1] = 2;
+        a[1][2] = 3;
+
+        a[2][0] = 1;
+        a[2][1] = 2;
+        a[2][2] = 3;
+
+        for (int i = 0; i < a.length ; i++) {
+            for (int j = 0; j < a[i].length; j++) {
+                System.out.print(a[i][j] + "\t");
+            }
+            System.out.println();
+        }
+
+        // 가변길이 배열
+        int[][] star = new int[5][];
+        star[0] = new int[1];
+        star[1] = new int[2];
+        star[2] = new int[3];
+        star[3] = new int[4];
+        star[4] = new int[5];
+
+        for (int i = 0; i <star.length ; i++) {
+            for (int j = 0; j < star[i].length ; j++) {
+                star[i][j] = '*';
+                System.out.print((char) star[i][j]);
+            }
+            System.out.println();
+        }
+    }
+}