Question

Find and correct at least two errors in each of the following segments of code.

1. a) final int ARRAY_SIZE = 5;
   ARRAY_SIZE = 10;
   int[] table = new int[ARRAY_SIZE]; for (int x = 0; x <= ARRAY_SIZE; x++)

         table[x] = 99;
   

2. b) String[] names = {“Mina” , “George”};
   int totalLength = 0;
   for (int i = 0; i <= names.length() ; i++)

           totalLength += names[i].length;
   

3. c) String[] words = “Hello”,“Goodbye”; System.out.println(words.toUpperCase());

4. d) public class MyClass { private int x;

         private double y;
         public void MyClass (double a, double b) {
   

   x = a;

   y = b; }

   }

5. e) public class MyClass { private int x;

         private double y;
         public static void myFuncion(int a, double b) {
   

   x = a;

   y = b; }

         public static int myFunction(int a, double b) {
             x = a;
   

   y = b;

   return 1; }

   }

Answer 1

a)

final int ARRAY_SIZE = 5;
int[] table = new int[ARRAY_SIZE]; for (int x = 0; x < ARRAY_SIZE; x++)

      table[x] = 99;

In the code, we cannot modify the value of a variable declared as final. Also, the loop will iterate to less than the value of ARRAY_SIZE.

b)

String[] names = {"Mina" , "George"};
int totalLength = 0;
for (int i = 0; i < names.length ; i++)

totalLength += names[i].length();
   }

In the for loop header, to access the length of the array we use names.length and run the loop to a value less than it.Inside the loop, we get the length of individual string using names[i].length() function.

c) String[] words = {"Hello","Goodbye"};
System.out.println(words[0].toUpperCase());

words will be declared as and array, and a value of words array will be converted to upper case since toUpperCase() method works on string objects.

d)

public class MyClass {

private int x;

private double y;

public MyClass (double a, double b) {

x = a;

y = b; }

}

The constructor does not have a return type in a class.

e)

public class MyClass {

private int x;

private double y;

public void myFuncion(int a, double b) {

x = a;

y = b;

}

public int myFunction(int a, double b) {

x = a;

y = b;

return 1;

}

}

Non-static variables cannot be reference from static context. We just make the methods not static.