cohort 42.1 hw #17, lesson #18

Author: biblelamp

BerlinAIT/Cohort42.1/src/extend/Interpreter.java

@@ -1,13 +1,12 @@
 package extend;
 
-import java.util.Arrays;
 import java.util.Scanner;
 
 /**
  * AIT-TR, cohort 42.1, Java Basic, hw #10 ext
  *
  * @author Sergey Iryupin
- * @version 8-Feb-24
+ * @version 8,23-Feb-24
  */
 public class Interpreter {
 
@@ -37,6 +36,10 @@ static void assignValue(String line) {
         String[] tokens = line.split("=");
         String varName = tokens[0].trim();
         String varValue = tokens[1].trim();
+        // check variable name
+        if (!validateVarName(varName)) {
+            return;
+        }
         // transform 'a' -> 0
         int idx = varName.charAt(0) - 'a';
         // transform "123" -> 123
@@ -46,7 +49,27 @@ static void assignValue(String line) {
     }
 
     static void printValue(String varName) {
+        // check variable name
+        if (!validateVarName(varName)) {
+            return;
+        }
+        // transform 'a' -> 0
         int idx = varName.charAt(0) - 'a';
+        // print value of variable
         System.out.println(values[idx]);
     }
+
+    static boolean validateVarName(String varName) {
+        // check variable name length
+        if (varName.length() > 1) {
+            System.out.println("Error: variable name is too long");
+            return false;
+        }
+        if (varName.isEmpty()) {
+            System.out.println("Error: variable name is empty");
+            return false;
+        }
+        // TODO check if variable name in 'a'..'z'
+        return true;
+    }
 }

BerlinAIT/Cohort42.1/src/lesson17/homework/Employee.java

@@ -0,0 +1,35 @@
+package lesson17.homework;
+
+public class Employee {
+    private String name;
+    private String position;
+    private String email;
+    private String phone;
+    private int salary;
+    private int age;
+
+    public Employee(String name, String position, String email, String phone, int salary, int age) {
+        this.name = name;
+        this.position = position;
+        this.email = email;
+        this.phone = phone;
+        this.salary = salary;
+        this.age = age;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "name='" + name + '\'' +
+                ", position='" + position + '\'' +
+                ", email='" + email + '\'' +
+                ", phone='" + phone + '\'' +
+                ", salary=" + salary +
+                ", age=" + age +
+                '}';
+    }
+}

BerlinAIT/Cohort42.1/src/lesson17/homework/HomeWork17.java

@@ -0,0 +1,22 @@
+package lesson17.homework;
+
+/**
+ * AIT-TR, cohort 42.1, Java Basic, hw #17
+ *
+ * @author Sergey Iryupin
+ * @version 23-Feb-24
+ */
+public class HomeWork17 {
+    public static void main(String[] args) {
+        Employee[] employees = {
+                new Employee("a1", "d1", "e1", "t1", 1000, 40),
+                new Employee("a2", "d2", "e2", "t2", 1200, 43),
+                new Employee("a3", "d3", "e3", "t3", 800, 37)
+        };
+        for (Employee employee : employees) {
+            if (employee.getAge() > 40) {
+                System.out.println(employee);
+            }
+        }
+    }
+}

BerlinAIT/Cohort42.1/src/lesson18/Lesson18.java

@@ -0,0 +1,29 @@
+package lesson18;
+
+/**
+ * AIT-TR, cohort 42.1, Java Basic, Lesson #18
+ *
+ * @version 23-Feb-24
+ */
+public class Lesson18 {
+    public static void main(String[] args) {
+        final int a;
+        a = 10;
+        //a = 5 + 1; compile error
+
+        System.out.println(Robot.COMPANY_NAME);
+
+        Robot robot = new Robot(8);
+        System.out.println(robot);
+        System.out.println(Robot.getCount());
+        System.out.println(Robot.add(2, 2));
+        robot.addAndSave(5);
+        robot.addAndSave(12);
+        System.out.println(robot.getSum());
+
+        Robot r2d2 = new Robot(2);
+        System.out.println(r2d2);
+        System.out.println(Robot.getCount());
+        System.out.println(r2d2.getSum());
+    }
+}

BerlinAIT/Cohort42.1/src/lesson18/Robot.java

@@ -0,0 +1,40 @@
+package lesson18;
+
+public class Robot {
+
+    public static final String COMPANY_NAME = "Boston Dynamics";
+
+    private int countCPU;
+    private int sum;
+
+    private static int count;
+
+    public Robot(int countCPU) {
+        this.countCPU = countCPU;
+        this.sum = 0;
+        count++;
+    }
+
+    public static int getCount() {
+        return count;
+    }
+
+    public static int add(int a, int b) {
+        return a + b;
+    }
+
+    public void addAndSave(int a) {
+        sum += a;
+    }
+
+    public int getSum() {
+        return sum;
+    }
+
+    @Override
+    public String toString() {
+        return "Robot{" +
+                "countCPU=" + countCPU +
+                '}';
+    }
+}