//Problema 1 public class lab4 {
public static void main(String[] args) {
System.out.println(mijloc("3501"));
System.out.println(mijloc("350"));
}
public static String mijloc(String cuvant) {
StringBuilder builder = new StringBuilder();
if (cuvant.length() % 2 == 0) {
builder.append(cuvant.charAt(cuvant.length() / 2 - 1));
builder.append(cuvant.charAt(cuvant.length() / 2));
} else {
builder.append(cuvant.charAt(cuvant.length() / 2));
}
return builder.toString();
}
}
// Problema 2 public class SumaCifrelor { public static int sumaCifrelor(int numar) { int suma = 0;
while (numar != 0) {
suma += numar % 10;
numar /= 10;
}
return suma;
}
public static void main(String[] args) {
int numar = 12345;
int rezultat = sumaCifrelor(numar);
System.out.println("Suma cifrelor numărului " + numar + " este: " + rezultat);
}
}
// Problema 3 public class Dog { private String name; private String breed;
public Dog(String name, String breed) {
this.name = name;
this.breed = breed;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBreed() {
return breed;
}
public void setBreed(String breed) {
this.breed = breed;
}
}
public class Main { public static void main(String[] args) {
Dog dog1 = new Dog("Max", "Golden Retriever");
Dog dog2 = new Dog("Buddy", "Labrador");
System.out.println("Proprietățile inițiale ale primului câine:");
System.out.println("Nume: " + dog1.getName());
System.out.println("Rasă: " + dog1.getBreed());
System.out.println("\nProprietățile inițiale ale celui de-al doilea câine:");
System.out.println("Nume: " + dog2.getName());
System.out.println("Rasă: " + dog2.getBreed());
dog1.setName("Rocky");
dog2.setBreed("German Shepherd");
System.out.println("\nProprietățile modificate ale primului câine:");
System.out.println("Nume: " + dog1.getName());
System.out.println("Rasă: " + dog1.getBreed());
System.out.println("\nProprietățile modificate ale celui de-al doilea câine:");
System.out.println("Nume: " + dog2.getName());
System.out.println("Rasă: " + dog2.getBreed());
}
}
// Problema 4 public class Rectangle { private double width; private double length;
public Rectangle(double width, double length) {
this.width = width;
this.length = length;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getLength() {
return length;
}
public void setLength(double length) {
this.length = length;
}
public double calculateArea() {
return width * length;
}
public double calculatePerimeter() {
return 2 * (width + length);
}
public static void main(String[] args) {
Rectangle myRectangle = new Rectangle(5.0, 10.0);
System.out.println("Aria dreptunghiului: " + myRectangle.calculateArea());
System.out.println("Perimetrul dreptunghiului: " + myRectangle.calculatePerimeter());
}
}
// Problema 5 class Person { private String name; private String email;
public Person(String name, String email) {
this.name = name;
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
class Student extends Person { private int[] grades;
public Student(String name, String email, int[] grades) {
super(name, email);
this.grades = grades;
}
public int[] getGrades() {
return grades;
}
public void setGrades(int[] grades) {
this.grades = grades;
}
}
class Professor extends Person { private String[] courses;
public Professor(String name, String email, String[] courses) {
super(name, email);
this.courses = courses;
}
public String[] getCourses() {
return courses;
}
public void setCourses(String[] courses) {
this.courses = courses;
}
}
public class Main { public static void main(String[] args) {
Person person = new Person("John Doe", "[email protected]");
int[] studentGrades = { 90, 85, 78 };
Student student = new Student("Alice Smith", "[email protected]", studentGrades);
String[] professorCourses = { "Math", "Physics", "Computer Science" };
Professor professor = new Professor("Dr. Smith", "[email protected]", professorCourses);
System.out.println("Informații despre persoana:");
System.out.println("Nume: " + person.getName());
System.out.println("Email: " + person.getEmail());
System.out.println("\nInformații despre student:");
System.out.println("Nume: " + student.getName());
System.out.println("Email: " + student.getEmail());
System.out.println("Note: " + java.util.Arrays.toString(student.getGrades()));
System.out.println("\nInformații despre profesor:");
System.out.println("Nume: " + professor.getName());
System.out.println("Email: " + professor.getEmail());
System.out.println("Cursuri predate: " + java.util.Arrays.toString(professor.getCourses()));
}
}
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