From 448ac191b1db96ce0940e2bf10a2d351a4874392 Mon Sep 17 00:00:00 2001
From: Codes5761 <57105645+Codes5761@users.noreply.github.com>
Date: Mon, 28 Oct 2019 21:29:22 +0530
Subject: [PATCH 1/2] Created stack in java

Created stack in java
---
 Data Structures/Stacks/Stack.java | 60 +++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Data Structures/Stacks/Stack.java

diff --git a/Data Structures/Stacks/Stack.java b/Data Structures/Stacks/Stack.java
new file mode 100644
index 00000000..c1ee055f
--- /dev/null
+++ b/Data Structures/Stacks/Stack.java	
@@ -0,0 +1,60 @@
+
+// Java code for stack implementation 
+  
+import java.io.*; 
+import java.util.*; 
+  
+class Test 
+{    
+    // Pushing element on the top of the stack 
+    static void stack_push(Stack<Integer> stack) 
+    { 
+        for(int i = 0; i < 5; i++) 
+        { 
+            stack.push(i); 
+        } 
+    } 
+      
+    // Popping element from the top of the stack 
+    static void stack_pop(Stack<Integer> stack) 
+    { 
+        System.out.println("Pop :"); 
+  
+        for(int i = 0; i < 5; i++) 
+        { 
+            Integer y = (Integer) stack.pop(); 
+            System.out.println(y); 
+        } 
+    } 
+  
+    // Displaying element on the top of the stack 
+    static void stack_peek(Stack<Integer> stack) 
+    { 
+        Integer element = (Integer) stack.peek(); 
+        System.out.println("Element on stack top : " + element); 
+    } 
+      
+    // Searching element in the stack 
+    static void stack_search(Stack<Integer> stack, int element) 
+    { 
+        Integer pos = (Integer) stack.search(element); 
+  
+        if(pos == -1) 
+            System.out.println("Element not found"); 
+        else
+            System.out.println("Element is found at position " + pos); 
+    } 
+  
+  
+    public static void main (String[] args) 
+    { 
+        Stack<Integer> stack = new Stack<Integer>(); 
+  
+        stack_push(stack); 
+        stack_pop(stack); 
+        stack_push(stack); 
+        stack_peek(stack); 
+        stack_search(stack, 2); 
+        stack_search(stack, 6); 
+    } 
+} 

From ec4dd57452b2cb9b79d79db880b9234086baaaab Mon Sep 17 00:00:00 2001
From: Codes5761 <57105645+Codes5761@users.noreply.github.com>
Date: Mon, 28 Oct 2019 21:33:20 +0530
Subject: [PATCH 2/2] Created queues  in java

Created queues  in java
---
 Data Structures/Queues/Queues.java | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Data Structures/Queues/Queues.java

diff --git a/Data Structures/Queues/Queues.java b/Data Structures/Queues/Queues.java
new file mode 100644
index 00000000..c081a803
--- /dev/null
+++ b/Data Structures/Queues/Queues.java	
@@ -0,0 +1,33 @@
+import java.util.LinkedList; 
+import java.util.Queue; 
+  
+public class QueueExample 
+{ 
+  public static void main(String[] args) 
+  { 
+    Queue<Integer> q = new LinkedList<>(); 
+  
+    // Adds elements {0, 1, 2, 3, 4} to queue 
+    for (int i=0; i<5; i++) 
+     q.add(i); 
+  
+    // Display contents of the queue. 
+    System.out.println("Elements of queue-"+q); 
+  
+    // To remove the head of queue. 
+    int removedele = q.remove(); 
+    System.out.println("removed element-" + removedele); 
+  
+    System.out.println(q); 
+  
+    // To view the head of queue 
+    int head = q.peek(); 
+    System.out.println("head of queue-" + head); 
+  
+    // Rest all methods of collection interface, 
+    // Like size and contains can be used with this 
+    // implementation. 
+    int size = q.size(); 
+    System.out.println("Size of queue-" + size); 
+  } 
+}