Added progra for Java If else

Java/java-basics/JavaIfElse.java

@@ -0,0 +1,21 @@
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class JavaIfElse {
+    public static void main(String[] args) {
+        int age = 20;
+        if (age < 18) {
+            System.out.println("You are not an adult.");
+        } else {
+            System.out.println("You are an adult.");
+        }
+    }
+
+    public static void ifStatement(String[] args) {
+        int age = 30;
+        if (age >= 18) {
+            System.out.println("You are an adult.");
+        }
+    }
+}