patterns

problems/Pattern01.java

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+/*Print the following pattern: Solid Rectangle
+
+    * * * * *
+    * * * * *
+    * * * * *
+    * * * * *
+    
+ */
+
+package problems;
+
+class Pattern01 {
+
+    public static void main(String args[]) {
+
+        int rows = 4;
+        int columns = 5;
+
+        for (int i = 1; i <= rows; i++) {
+
+            for (int j = 1; j <= columns; j++) {
+                System.out.print("* ");
+            }
+            System.out.println();
+        }
+
+    }
+
+}

problems/Pattern02.java

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+/*Print the following pattern: Hollow Rectangle
+
+    * * * * *
+    *       *
+    *       *
+    * * * * *
+    
+ */
+
+package problems;
+
+public class Pattern02 {
+
+    public static void main(String[] args) {
+        int rows = 4;
+        int columns = 5;
+
+        for (int i = 1; i <= rows; i++) {
+            for (int j = 1; j <= columns; j++) {
+                if (i == 1 || j == 1 || i == rows || j == columns) {
+                    System.out.print("* ");
+                } else {
+                    System.out.print("  ");
+                }
+            }
+            System.out.println();
+        }
+    }
+
+}

problems/Pattern03.java

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+/*Print the following pattern: Hollow Rectangle
+
+    * 
+    * *
+    * * * 
+    * * * * 
+    
+ */
+
+package problems;
+
+public class Pattern03 {
+
+    public static void main(String[] args) {
+        int rows = 4;
+        int columns = 4;
+
+        for (int i = 1; i <= rows; i++) {
+
+            for (int j = 1; j <= i; j++) {
+
+                System.out.print("* ");
+
+            }
+
+            System.out.println();
+        }
+    }
+
+}