IT 401 Business Computer Languages Java programs

Description

IT 401 Business Computer Languages Java programs

Q1.:
Write a complete Java program (code + screenshot of output) that performs the following:
Given the following marks of a student: 84, 72, 91, 61, 69, 77
• Create an array (marksArray) to include all of student marks.
• Create a method (smallest) to find the smallest mark and print its value.
• Create a method (average) to compute the average of a student marks and return its value to the caller.
• Create a new array (backup) to copy all marks of the current array (marksArray). (Hint: use Arrays.copyOf method)
Answer:

Q2.:
Write a complete Java program (code + screenshot of output) that performs the following:
• Create an array list and add the following items: [Toyota, Nissan, Mercedes, Mazda].
• Print out the existing items of the array list on the screen.
• Replace the item “Mercedes” with “Kia”, and remove the item “Mazda”.
• Print out the current array list items in the opposite order.
Answer:

Q3.:
Write a complete Java program (code + screenshot of output) that performs the following:
• Write a while loop that reads integer values entered by user.
• Stop when a user enters any non-integer value.
• Compute the sum of all entered values that are greater than Zero and print the result on the screen.
Answer:

Q4.:
Each of the following Java code contains one or more errors. Find the error(s) and modify the code so that it will work properly.
# Original Code Correct Code
1. int[] values= values [10];
for (int i = 0; i <= 10; i++)
  {
     values [i] = i * i;
  } 

2. int count= -10;
while (count<0)
 {
   System.out.println(count);
 } 

3. 
for (double i : values)
 {
   Sum = sum + values [i];
   i++;
 }
 
4. int fractions[] = [2.8, 5.5, 4.6]; 

5. ArrayList arr = new ArrayList();
arr.add(5);
System.out.println(arr.length); 

6. for (int i = 0; i < arrSize; i++)
{
  System.out.println(values);
}