6.13: Java Examples
- Page ID
- 10683
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Arrays
// This program demonstrates array processing, including: // display, total, max, min, parallel arrays, sort // multidimensional arrays, and dynamic arrays. import java.util.*; class Main { public static void main(String[] args) { String[] names = {"Lisa", "Michael", "Ashley", "Jacob", "Emily"}; int[] ages = {49, 48, 26, 19, 16}; displayArray(ages); int total = sum(ages); int maximum = max(ages); int minimum = min(ages); System.out.println("total: " + total); System.out.println("maximum: " + maximum); System.out.println("minimum: " + minimum); displayParallel(names, ages); Arrays.sort(ages); displayArray(ages); displayMultidimensional(); dynamicArray(); } public static void displayArray(int[] array) { for (int index = 0; index < array.length; index++) { System.out.println("array[" + index + "] = " + array[index]); } } public static int sum(int[] array) { int total = 0; for (int index = 0; index < array.length; index++) { total += array[index]; } return total; } public static int max(int[] array) { int maximum = array[0]; for (int index = 1; index < array.length; index++) { if (maximum < array[index]) { maximum = array[index]; } } return maximum; } public static int min(int[] array) { int minimum = array[0]; for (int index = 1; index < array.length; index++) { if (minimum > array[index]) { minimum = array[index]; } } return minimum; } public static void displayParallel(String[] names, int[] ages) { for (int index = 0; index < names.length; index++) { System.out.println(names[index] + " is " + ages[index] + " years old"); } } public static void displayMultidimensional() { String[][] game = { {"X", "O", "X"}, {"O", "O", "O"}, {"X", "O", "X"} }; for (int row = 0; row < 3; row++) { for (int column = 0; column < 3; column++) { System.out.print(game[row][column]); if (column < 2) { System.out.print(" | "); } } System.out.println(); } } public static void dynamicArray() { ArrayList<Integer> array = new ArrayList<Integer>(); for (int index = 0; index < 5; index++) { int number = (int) Math.floor(Math.random() * 100); array.add(number); } System.out.println(array); } }
Output
array[0] = 49 array[1] = 48 array[2] = 26 array[3] = 19 array[4] = 16 total: 158 maximum: 49 minimum: 16 Lisa is 49 years old Michael is 48 years old Ashley is 26 years old Jacob is 19 years old Emily is 16 years old array[0] = 16 array[1] = 19 array[2] = 26 array[3] = 48 array[4] = 49 X | O | X O | O | O X | O | X [49, 83, 75, 13, 17]