JavaBasicsLab Session 3

src/JavaBasicsLab/MainClassForFirstSession.java

@@ -5,10 +5,52 @@
 public class MainClassForFirstSession {
 
  public static void main(String[] args) {
+
+
+ int vector1[] = {1, 2, 3};
+ int[] vector2 = {4, 5, 6}; //format to be used
+
+ int[] vector3 = new int[5];
+
+ vector3[0] = 1;
+ vector3[1] = 4;
+ vector3[2] = vector3[0];
+ //vector3[3] = 3;
+ vector3[4] = vector3[4];
+
+ printArray(vector3);
+ findMaxNumber(vector3);
+ }
+
+ private static int[] printArray(int[] arr) {
+
+// for (int anArr : arr) {
+// System.out.println(anArr);
+// }
+
+ for (int i = 0; i < arr.length; i++) {
+ System.out.println(arr[i]);
+ }
+ return arr;
+ }
+
+ private static int findMaxNumber(int[] arr) {
+ int max = 0;
+ for (int i = 0; i < arr.length; i++) {
+ if (max < arr[i]) {
+ max = arr[i];
+ }
+ }
+ System.out.println("Nr. maxim este: " + max);
+ return max;
+ }
+
+ private static void javaSessionTwoAndThree() {
  int numarulMeu = 12;
  int numarulTau = 20;
 
  int suma = numarulMeu + numarulTau;
+
  String descriere = "Suma celor doua numere este: ";
  String descriere2 = "bla bla";
  String concatenare = descriere + descriere2;
@@ -17,56 +59,47 @@ public static void main(String[] args) {
  System.out.println(suma);
  printare();
 
- for (int i = 0; i <= 1000; i=i+100) {
-
- System.out.println("Iteratia Numarul : " + i);
-
+ for (int i = 0; i <= 1000; i = i + 100) {
+ System.out.println("Iteratia Numarul : " + i);
  }
 
  int x = 0; //initializare
 
  while (x < 6) {
-
  printeazaValoareaLuiX(x);
-
  int restulImpartirii = x % 2;
-
  if (restulImpartirii == 0) {
-
  System.out.println("Numarul par este : " + x);
-
- }
- else {
+ } else {
  if (restulImpartirii == 1) {
  System.out.println("Am intrat pe ramura 2 de IF : " + x);
  }
  }
 
  System.out.println("--------------");
-
  x++;
 
  }
 
  printare();
 
-
  // Homework JavaBasics Session2
  sumTwoNumbers(1, 2);
  subtractTwoNumbers(100, 91);
- divideTwoNumbers(7, 3);
+ divideTwoNumbers(2134, 13);
  multiplyTwoNumbers(5, 7);
 
  //V1
- for (int i=1; i<=10; i++){
+ for (int i = 1; i <= 10; i++) {
  xToThePowerOfY(2, i);
  }
 
  //V2
  xToThePowerOfYLoop(2, 10);
 
 
-
+ //Java Session 3
+ double y = divideTwoNumbers(3, 0);
  }
 
  private static void printare() {
@@ -81,7 +114,7 @@ private static void printeazaValoareaLuiX(int x) {
 
  }
 
- private static int sumTwoNumbers(int num1, int num2){
+ private static int sumTwoNumbers(int num1, int num2) {
 
  int sum = num1 + num2;
 
@@ -90,7 +123,7 @@ private static int sumTwoNumbers(int num1, int num2){
  return sum;
  }
 
- private static int subtractTwoNumbers(int num1, int num2){
+ private static int subtractTwoNumbers(int num1, int num2) {
 
  int difference = num1 - num2;
 
@@ -99,16 +132,20 @@ private static int subtractTwoNumbers(int num1, int num2){
  return difference;
  }
 
- private static double divideTwoNumbers(int num1, int num2){
+ private static double divideTwoNumbers(double num1, double num2) {
+ //Double division by 0 is infinity
 
- double division = num1 / num2;
+ if (num2 == 0) {
+ System.out.println("Impartirea la 0 nu poate fi rezolvata");
+ return 0;
+ }
 
+ double division = num1 / num2;
  System.out.println("Impartirea numerelor este: " + division);
-
  return division;
  }
 
- private static int multiplyTwoNumbers(int num1, int num2){
+ private static int multiplyTwoNumbers(int num1, int num2) {
 
  int multiplication = num1 * num2;
 
@@ -117,7 +154,7 @@ private static int multiplyTwoNumbers(int num1, int num2){
  return multiplication;
  }
 
- private static int xToThePowerOfY(int x, int y){
+ private static int xToThePowerOfY(int x, int y) {
 
  //We are not in Python anymore, Toto...
  //int result = x ^ y;
@@ -130,7 +167,7 @@ private static int xToThePowerOfY(int x, int y){
  return result;
  }
 
- private static int xToThePowerOfYLoop(int x, int y){
+ private static int xToThePowerOfYLoop(int x, int y) {
 
  int result = 1;
 
@@ -143,8 +180,4 @@ private static int xToThePowerOfYLoop(int x, int y){
  return result;
  }
 
-
-
-
-
 }