LinkedStack

Author: jszlenk

Lists/src/Stacks/LinkedStack/Employee.java

@@ -0,0 +1,43 @@
+package Stacks.LinkedStack;
+
+public class Employee {
+
+    private String firstName;
+    private String lastName;
+    private int id;
+
+    public Employee(String firstName, String lastName, int id) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (id != employee.id) return false;
+        if (!firstName.equals(employee.firstName)) return false;
+        return lastName.equals(employee.lastName);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = firstName.hashCode();
+        result = 31 * result + lastName.hashCode();
+        result = 31 * result + id;
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                ", id=" + id +
+                '}';
+    }
+}

Lists/src/Stacks/LinkedStack/LinkedStack.java

@@ -0,0 +1,32 @@
+package Stacks.LinkedStack;
+
+import java.util.LinkedList;
+import java.util.ListIterator;
+
+class LinkedStack {
+
+    private LinkedList<Employee> stack;
+
+    LinkedStack() {
+        stack = new LinkedList<>();
+    }
+
+    void push(Employee employee) {
+        stack.push(employee);
+    }
+
+    Employee pop() {
+        return stack.pop();
+    }
+
+    Employee peek() {
+        return stack.peek();
+    }
+
+    void printStack() {
+        ListIterator<Employee> iterator = stack.listIterator();
+        while (iterator.hasNext()) {
+            System.out.println(iterator.next());
+        }
+    }
+}

Lists/src/Stacks/LinkedStack/Main.java

@@ -0,0 +1,30 @@
+package Stacks.LinkedStack;
+
+public class Main {
+    public static void main(String[] args) {
+
+        LinkedStack stack = new LinkedStack();
+
+        Employee adam = new Employee("Adam", "X", 1);
+        Employee maja = new Employee("Maja", "Y", 2);
+        Employee kuba = new Employee("Kuba", "Z", 3);
+        Employee olga = new Employee("Olga", "O", 4);
+
+        stack.push(adam);
+        stack.push(maja);
+        stack.push(kuba);
+        stack.push(olga);
+
+        stack.printStack();
+        System.out.println("-----------------------------");
+
+        System.out.println(stack.peek());
+        System.out.println("-----------------------------");
+
+        System.out.println("Popped: " + stack.pop());
+        System.out.println(stack.peek());
+
+        System.out.println("-----------------------------");
+        stack.printStack();
+    }
+}