LAB-Java Basics

src/lab/exercise1/Exercise1.java

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+package lab.exercise1;
+
+public class Exercise1 {
+    public static void main (String [] args){
+
+        //Creamos el array de Lista de Numeros
+        int[] listNumbers = { 3, 6, 9, 13, 21 };
+        int max = listNumbers[0];
+        int min = listNumbers[0];
+
+        //Recorremos la lista de numeros, if (comparar y actualizar)
+        for (int i = 0; i < listNumbers.length; i++) {
+            if (listNumbers[i] > max){
+                max = listNumbers[i]; //Valor Maximo
+            }
+            if (listNumbers[i] < min){
+                min = listNumbers[i]; //Valor Minimo
+            }
+        }
+        int total = max - min;
+        System.out.println(total);
+
+    }
+}

src/lab/exercise2/Exercise2.java

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+package lab.exercise2;
+
+public class Exercise2 {
+    public static void main (String[] args){
+
+        int[] numbers = {3, 5, 8, 9, 1};
+        int min = numbers[0];
+        int secondMin = numbers[0];
+
+        //Creamos el array de numeros
+        for (int i = 0; i < numbers.length; i++) {
+            //Recorremos con un bucle
+            if (numbers[i] <= min){
+                secondMin = min;
+                min = numbers[i];
+            }
+            else if (numbers[i] < secondMin && numbers[i] != min ){
+            secondMin = numbers[i];
+            }
+        }// Concatenamos
+        System.out.println("Minimum :" + min);
+        System.out.println("Second Minimum : " + secondMin);
+    }
+}

src/lab/exercise3/Employee.java

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+package lab.exercise3;
+
+public class Employee {
+
+    //Ponemos atributos al empleado (en privado)
+    private String name;
+    private int age;
+    private double salary;
+    private boolean isFullTime;
+    private char shift;
+
+    //Creamos el constructor(cuando cree un empleado, me das estos datos)
+    public Employee(String name, int age, double salary, boolean isFullTime, char shift) {
+        this.name = name;
+        this.age = age;
+        this.salary = salary;
+        this.isFullTime = isFullTime;
+        this.shift = shift;
+    }
+
+    //Creamos los Getter ( para leer u obtener los datos)
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public boolean isFullTime() { //en boolean es importante el "is" en vez del "get"
+        return isFullTime;
+    }
+
+    public char getShift() {
+        return shift;
+    }
+
+    //Creamos los Setter si luego queremos modificar los datos
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public void setSalary(double salary) {
+        this.salary = salary;
+    }
+
+    public void setFullTime(boolean fullTime) {
+        this.isFullTime = fullTime;
+    }
+
+    public void setShift(char shift) {
+        this.shift = shift;
+    }
+
+    // ahora creamos el @OVERRRIDE para imprimir LIMPIO
+    @Override
+    public String toString() {
+        return "Employee --> {" +
+                "name : " + name +
+                ", age : " + age +
+                ", salary : " + salary +
+                ", isFullTime : " + isFullTime +
+                ", shift : " + shift + "}";
+
+    }
+
+}

src/lab/exercise3/Intern.java

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+package lab.exercise3;
+
+public class Intern extends Employee {
+    public static final double MAX_SALARY = 20000;
+
+    public Intern(String name, int age, double salary, boolean isFullTime, char shift){
+        super(name, age, salary> MAX_SALARY ? MAX_SALARY : salary, isFullTime, shift);
+    }
+
+    //Esto aun me confunde!!! (necesitas practicar)
+    @Override
+    public void setSalary(double salary) {
+        if (salary > MAX_SALARY) {
+            super.setSalary(MAX_SALARY);
+            return;
+        }
+        super.setSalary(salary);
+    }
+
+    // Ahora un @override toString llamando a SUPER para usar los atributos del padre (Employee)
+    @Override
+    public String toString() {
+        return "Intern --> " + super.toString();
+    }
+}
+

src/lab/exercise3/Main.java

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+package lab.exercise3;
+
+public class Main {
+    public static void main (String [] args ){
+
+        Employee e1 = new Employee("Roberto",35,35100,true,'L');
+        Employee e2 = new Employee( "Lisbeth", 42, 24000, false, 'E');
+        Employee e3 = new Employee( "Pedro", 45, 31000, true, 'E');
+        Employee e4 = new Employee("Carlos",36,35100,true,'L');
+        Employee e5 = new Employee( "Anna", 43, 24000, false, 'E');
+        Employee e6 = new Employee( "Juan", 48, 31000, true, 'E');
+        Employee e7 = new Employee("Cristina",33,35100,true,'L');
+        Employee e8 = new Employee( "Santi", 37, 24000, false, 'E');
+        Employee e9 = new Employee( "Laura", 49, 31000, true, 'E');
+        Employee e10 = new Employee("Fred",35,35100,true,'L');
+
+
+
+        // uso el Get para ver los datos y el Set para modificar
+        System.out.println(e1.getName() + " - Salary After:" + e1.getSalary());
+        e1.setSalary(45100);
+        System.out.println(e1.getName() + " -  Before:" + e1.getSalary());
+        System.out.println();
+
+        System.out.println(e2.getName() + " - Salary After:" + e2.getSalary());
+        e2.setSalary(30000);
+        System.out.println(e2.getName() + " - Before:" + e2.getSalary());
+        System.out.println();
+
+        System.out.println(e9.getName() + " - Salary After:" + e9.getSalary());
+        e9.setSalary(21000);
+        System.out.println(e9.getName() + " - Before:" + e9.getSalary());
+        System.out.println();
+
+        //Hemos creado Intern y heredado de Employee
+        Intern intern1 = new Intern("Sandra", 39, 50000, true, 'L');
+        Intern intern2 = new Intern("Marcos", 28, 20000, false,'E');
+        Intern intern3 = new Intern("Lucas", 50, 10000, true, 'L');
+
+        System.out.println(intern1.getName()+ " - Salary : "+ intern1.getSalary());
+        System.out.println(intern2.getName()+ " - Salary : "+ intern2.getSalary());
+        System.out.println(intern3.getName()+ " - Salary : "+ intern3.getSalary());
+
+        System.out.println();
+        System.out.println(e5);
+        System.out.println(e2);
+        System.out.println(intern1);
+
+
+    }
+
+}
+