If all the code snippets below assume properly that an ...



Name____________________________________ APCS A (Java Concepts Worksheet)

Beneath each header below, type or write a brief code snippet.

Be sure to properly declare && || initialize appropriate local variables.

For example;

int x, y, temp, sum;

double average;

boolean isEven = false;

If the problem calls for an array, assume the following array instantiation;

int[] myArray = new int[10];

…

How to average correctly – the simple version!

Type code here.

// the key here is to cast the sum to a double.

How to average correctly in an array

Type code here. Don’t forget your “for” loop!

// the key here is to cast the sum to a double to not lose decimal data

How to find max/min in an array

Type code here. Don’t forget your “for” loop!

// the key here is to properly initialize max and min before entering the for loop

How to swap elements – the simple version!

Begin code here.

// the key here is to perform the swap in the correct order

How to swap elements in an array – the simple version!

Type code here. No loop this time – just a simple swap.

// the key here is to perform the swap in the correct order

How to reverse an array

Begin code here. Remember you’re only looping through half of the array!

// the key here is to perform the swap in the correct order through just half of the array

How to increase the size of an array

Begin code here.

Explain the differences between selection sort and insertion sort algorithms. When would you use one over the other?

Type answer here.

How to turn a number into a String

int x;

String y;

Type answer here…

How to prompt users for input. What lines are necessary to “scan” for input?

Type answer here…

How to compute/generate a random number.

// HINT: you will need to use the math class to do this.

int num1;

double num2;

// First, generate random integer from 0 to 9

Type answer here…

// Second, generate random integer from 1 to 10

Type answer here…

// Third, generate random integer from 20 to 34

Type answer here…

// Fourth, generate random decimal from 0 to 0.99

Type answer here…

// Fifth, generate random decimal from 0 to 5.99

Type answer here…

How to extract individual digits from an integer.

// HINT: the concept is called modulus and you will need to use % operator(remainder)

int num = 12345;

int digitNum; // will be the extracted number

// get the ones digit

Type answer here…

// get the tens digit

Type answer here…

// get the hundreds digit

Type answer here…

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download