Try It Yourself: parameter passing

What gets printed when the method question1 is called?

  public static void question1() {
     int x = 84, y = 59;

     System.out.println("In main: x = " + x + "  y = " + y);
     swap(x, y);
     System.out.println("In main: x = " + x + "  y = " + y);
  }

  public static void swap(int x, int y) {
     System.out.println("In swap: x = " + x + "  y = " + y);
     int temp = x;
     x = y;
     y = temp;
     System.out.println("In swap: x = " + x + "  y = " + y);
  }

Suppose the class Question2 is defined as follows:

class Question2 {
   private double x;
   private double y;
   private double z;

   public Question2(double x, double y) {
      this.x = x;
      this.y = y;
      this.z = 14.6;
      System.out.println("x = " + x + "  y = " + y + "  z = " + z);
   }

   public double method1(double x) {
      x = x + y;
      y = 4 * x;
      System.out.println("x = " + x + "  y = " + y + "  z = " + z);
      return x;
   }

   public void method2() {
      double z;
      z = method1(y);
      System.out.println("x = " + x + "  y = " + y + "  z = " + z);
   }

   public void method3() {
      System.out.println("x = " + x + "  y = " + y + "  z = " + z);
   }
}

What is the output for the following lines of code?

Question2 q = new Question2(3.0, 7.0);
q.method3();
q.method2();
q.method3();

Suppose the class Question3 is defined as follows:

class Question3 {
   private int[] arr;
   private int count;
   private String s;

   public Question3(int size, String name) {
      arr = new int[size];
      for (int i = 0; i < arr.length; i++) 
         arr[i] = 2 * i;
      count = size - 3;
      s = name;
   }

   public void method1(String s) {
      s = "hi";
      arr[s.length()] = 5;
   }

   public void method2(int count, int[] a) {
      for (int i = 0; i < a.length; i += 2)
         a[i] = 10;
      arr[count] = arr[s.length()];
   }

   public void print() {
      System.out.println("s = " + s);
      System.out.println("count = " + count);
      System.out.print("arr = ");
      for (int i = 0; i < arr.length; i++)
         System.out.print(arr[i] + " ");
      System.out.println();
   }
}

What is the output for the following lines of code?

Question3 q = new Question3(5, "name");
int[] arr = {1, 1, 2, 3, 5}; 
q.print();
q.method1("bye");
q.print();
q.method2(1, arr);
q.print();
System.out.print("arr = ");
for (int i = 0; i < arr.length; i++) 
   System.out.print(arr[i] + " ");
System.out.println();