updated print stack code

Author: Neetika Khandelwal

core-java-modules/core-java-collections-7/src/main/java/com/baeldung/PrintStack.java

@@ -2,6 +2,7 @@
 
 import java.util.ArrayDeque;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.Deque;
 import java.util.Iterator;
@@ -42,13 +43,12 @@ public static void givenStack_whenUsingDirectForEach_thenPrintStack() {
 
     public static void givenStack_whenUsingStreamReverse_thenPrintStack() {
         Stack<Integer> stack = new Stack<>();
-        stack.push(10);
         stack.push(20);
+        stack.push(10);
         stack.push(30);
 
-        stack.stream()
-            .sorted(Comparator.reverseOrder())
-            .forEach(System.out::println);
+        Collections.reverse(stack);
+        stack.forEach(System.out::println);
     }
 
     public static void givenStack_whenUsingIterator_thenPrintStack() {

core-java-modules/core-java-collections-7/src/test/java/com/baeldung/printstack/PrintStackUnitTest.java

@@ -30,7 +30,7 @@ void givenStack_whenUsingDirectForEach_thenPrintStack() throws Exception {
     @Test
     void givenStack_whenUsingStreamReverse_thenPrintStack() throws Exception {
         String output = tapSystemOut(() -> PrintStack.givenStack_whenUsingStreamReverse_thenPrintStack());
-        assertEquals("30\n20\n10\n", output.replace("\r\n", "\n"));
+        assertEquals("30\n10\n20\n", output.replace("\r\n", "\n"));
     }
 
     @Test