Add all 23 GoF design pattern implementations

2026-07-25 10:50:29 +05:30
commit f5688a6b32
164 changed files with 4371 additions and 0 deletions
--- a/03-behavioral/interpreter/Main.java
+++ b/03-behavioral/interpreter/Main.java
@@ -0,0 +1,38 @@
+package interpreter;
+
+public class Main {
+    public static void main(String[] args) {
+        // (5 + 3) * 2  →  16
+        Expression expr1 = new MultiplyExpression(
+            new AddExpression(
+                new NumberExpression(5),
+                new NumberExpression(3)
+            ),
+            new NumberExpression(2)
+        );
+        System.out.println("(5 + 3) * 2 = " + expr1.interpret());
+
+        // 10 - (4 + 2)  →  4
+        Expression expr2 = new SubtractExpression(
+            new NumberExpression(10),
+            new AddExpression(
+                new NumberExpression(4),
+                new NumberExpression(2)
+            )
+        );
+        System.out.println("10 - (4 + 2) = " + expr2.interpret());
+
+        // (3 * 4) + (10 - 6)  →  16
+        Expression expr3 = new AddExpression(
+            new MultiplyExpression(
+                new NumberExpression(3),
+                new NumberExpression(4)
+            ),
+            new SubtractExpression(
+                new NumberExpression(10),
+                new NumberExpression(6)
+            )
+        );
+        System.out.println("(3 * 4) + (10 - 6) = " + expr3.interpret());
+    }
+}