huh?

src/l2a/Employee.java

@@ -0,0 +1,36 @@
+package l2a;
+
+public class Employee {
+    String ID;
+    String name;
+    String department;
+    int salary;
+    int bonus_salary;
+
+    public Employee (String ID, String name, String department, int salary, int bonus_salary) {
+        this.ID = ID;
+        this.name = name;
+        this.department = department;
+        this.salary = (salary);
+        this.bonus_salary = (bonus_salary);
+    }
+
+    public String getID() {
+        return ID;
+    }   
+    public String getName() {
+        return name;
+    }
+    public String getDepartment() {
+        return department;
+    }
+    public int getSalary() {
+        return salary;
+    }
+    public int getBonusSalary() {
+        return bonus_salary;
+    }   
+    public String funny() {
+        return ID + " " + name + " " + department + " " + salary + " " + bonus_salary;
+    }
+}

src/l2a/EmployeeFileRead.java

@@ -0,0 +1,92 @@
+package l2a;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+import java.io.*;
+
+public class EmployeeFileRead {
+    // thing
+    // function 1:
+    // read from stdin function:
+    // ask for n
+    // for each n ask for info of Employee
+    // how do i dynamic array
+    static List<Employee> employees = new ArrayList<Employee>();
+
+    public static void read() {
+        Scanner input = new Scanner(System.in);
+        System.out.print("Employee count: ");
+        int n = input.nextInt();
+        for (int i = 0; i < n; i++) {
+            System.out.print("ID: ");
+            String ID = input.next();
+            System.out.print("Name: ");
+            String name = input.next();
+            System.out.print("Department: ");
+            String department = input.next();
+            System.out.print("Salary: ");
+            int salary = input.nextInt();
+            System.out.print("Bonus: ");
+            int bonus = input.nextInt();
+            Employee employee = new Employee(ID, name, department, salary, bonus);
+            employees.add(employee);
+        }
+        input.close();
+        // for (Employee employee: employees) {
+        // System.out.println(employee.funny());
+        // }
+    }
+
+    public static void save(String filename) {
+        // save to file
+        try (PrintWriter writer = new PrintWriter(new FileWriter(filename))) {
+            for (Employee employee : employees) {
+                writer.println(employee.funny());
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static List<Employee> get(String filename) {
+        List<Employee> getEmployees = new ArrayList<Employee>();
+        try (BufferedReader file = new BufferedReader(new FileReader(filename));) {
+            String line;
+            while ((line = file.readLine()) != null) {
+                getEmployees.add(line(line));
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return getEmployees;
+    }
+
+    public static Employee line(String line) {
+        String[] data = line.split(" ");
+        return new Employee(data[0], data[1], data[2],
+                Integer.parseInt(data[3]),
+                Integer.parseInt(data[4]));
+    }
+
+    public static void print(List<Employee> employees) {
+        for (Employee employee : employees) {
+            System.out.println("ID: " +employee.getID());
+            System.out.println("Name: " +employee.getName());
+            System.out.println("Department: " +employee.getDepartment() );
+            double inc = employee.getSalary() + employee.getBonusSalary() * 2.5;
+            System.out.println("Income: " + inc);
+        }
+    }
+
+    public static void main(String[] args) {
+        read();
+        String filename = "employees.txt";
+        save(filename);
+        System.out.println("saved to " + filename + "\n");
+        System.out.println("retrieve from " + filename);
+        print(get(filename));
+        
+
+    }
+}

src/l2a/NameCard.java

@@ -0,0 +1,39 @@
+package l2a;
+
+
+public class NameCard {
+    String name;
+    String phone;
+    String email;
+
+    public String getName() {
+        return name;
+    }
+    public String getPhone() {
+        return phone;
+    }
+    public String getEmail() {
+        return email;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+    public void setEmail(String email) {
+        this.email = email;
+    }   
+
+    public String toString() {
+        return "NameCard [name=" + name + ", phone=" + phone + ", email=" + email + "]";
+    }
+    
+
+    public NameCard(String name, String phone, String email) {
+        this.name = name;
+        this.phone = phone;
+        this.email = email;
+    }
+}

src/l2a/NameCardTest.java

@@ -0,0 +1,14 @@
+package l2a;
+
+public class NameCardTest {
+    public static void main(String[] args) {
+        NameCard namecard = new NameCard("Ninja", "1441414414", "[email protected]");
+        System.out.println(namecard);
+        // equivalent to System.out.println(namecard.toString()); 
+        // have a toString method in your custom defined class that wants to be to string
+        System.out.println(namecard.getName());
+        System.out.println(namecard.getPhone());
+        System.out.println(namecard.getEmail());
+        // System.err.println(Integer.toString(11));
+    }
+}

src/l2a/shapeRead.java

@@ -0,0 +1,70 @@
+package l2a;
+
+public class shapeRead {
+
+    public static void main(String[] args) {        
+        Shape[] shapes = new Shape[3];
+        shapes[0] = new Point(1, 2);
+        shapes[1] = new Circle(1, 2, 3);
+        shapes[2] = new Cylinder(1, 2, 3, 4);
+        for (int i = 0; i < shapes.length; i++) {
+            System.out.println(shapes[i].getName());
+            System.out.println(shapes[i].calArea());
+            System.out.println(shapes[i].calVolume());
+        }
+    }
+}
+
+abstract class Shape {
+    double calArea() {
+        return 0;
+    }
+
+    double calVolume() {
+        return 0;
+    }
+
+    abstract String getName();
+
+}
+
+class Point extends Shape {
+    String getName() {
+        return this.getClass().getSimpleName();
+    }
+
+    protected double x;
+    protected double y;
+
+    Point(double x, double y) {
+        this.x = x;
+        this.y = y;
+    }
+
+}
+
+class Circle extends Point {
+
+    protected double r;
+    Circle(double x, double y, double r) {
+        super(x, y);
+        this.r = r;
+    }
+    double calArea() {
+        return (r*r * Math.PI);
+    }
+}
+
+class Cylinder extends Circle {
+    protected double h;
+    Cylinder(double x, double y, double r, double h) {
+        super(x, y, r);
+        this.h = h;
+    }
+    double calVolume() {
+        return (super.calArea() * h);
+    }    
+   double calArea() {
+        return 2 * (r*r * Math.PI) +  (2 * r * Math.PI) * h;
+    }    
+}