Iteration with 2D array
2D array
The following code outputs the monkeys horizontally in an imperative programming style.
/*
* Creator: Nighthawk Coding Society
* Mini Lab Name: Hello Series,featuring Monkey Jumpers
*/
/**
* Class for Monkeys: a 2D array of Monkeys
* As well as method to print the Poem
*/
class MonkeyLoop {
//The area between class definition and the 1st method is where we keep data for object in Java
String [][] monkeys; //2D Array: AP CSA Unit 8: 2D array of strings
//2D array is like a grid [x][y]
// or like a spreadsheet [row][column]
/**
* Constructor initializes a 2D array of Monkeys
*/
public MonkeyLoop() {
//Storing Data in 2D arrays
monkeys = new String[][]{ //2D array above is just a name, "new" makes a container ("object")
//Monkey 0
{
"ʕง ͠° ͟ل͜ ͡°)ʔ ", //[0][0] eyes
" \\_⏄_/ ", //[0][1] chin
" --0-- ", //[0][2] body
" ⎛ ⎞ " //[0][3] legs
},
//Monkey 1
{
" ʕ༼ ◕_◕ ༽ʔ", //[1][0]
" \\_⎏_/ ",
" ++1++ ",
" ⌋ ⌊ "
},
//Monkey 2
{
" ʕ(▀ ⍡ ▀)ʔ", //[2][0]
" \\_⎐_/ ",
" <-2-> ",
" 〈 〉 "
},
//Monkey 3
{
" ʕ ͡° ͜ʖ ° ͡ʔ", //[3][0]
" \\_⍾_/ ",
" ==3== ",
" _/ \\_ "
},
//Monkey 4
{
" (◕‿◕✿) ", //[4][0]
" \\_⍾_/ ", //[4][1]
" ==4== ", //[4][2]
" _/ \\_ " //[4][3]
},
};
}
/**
* Loop and print monkeys in array
* ... repeat until you reach zero ...
*/
public void printPoem() {
//begin the poem
System.out.println();
System.out.println("Monkey Jumpers Poem in Java Loopy");
// monkeys (non-primitive) defined in constructor knows its length
int monkeyCount = monkeys.length;
for (int i = monkeyCount; i >= 1; i--) //loops through 2D array length backwards
{
//this print statement shows current count of Monkeys
// concatenation (+) of the loop variable and string to form a countdown message
System.out.println(i + " little monkeys jumping on the bed...");
//how many separate parts are there in a monkey monkey?
for (int col = 0; col < monkeys[col].length; col++) { //cycles through "cells" of 2d array
/*cycles through columns to print
each monkey part by part, will eventually print entire column*/
for (int row = 0; row < monkeyCount; row++) {
// prints specific part of the monkey from the column
System.out.print(monkeys[row][col] + " ");
//this is new line between separate parts
// PREVENT NEW LINE FROM POPPING UP
//System.out.println();
}
//this new line gives separation between stanza of poem
System.out.println();
}
//countdown for poem, decrementing monkeyCount variable by 1
monkeyCount -= 1;
}
//out of all the loops, prints finishing messages
System.out.println("No more monkeys jumping on the bed");
System.out.println("0000000000000000000000000000000000");
System.out.println(" THE END ");
}
/**
* A Java Driver/Test method that is the entry point for execution
*/
public static void main(String[] args) {
new MonkeyLoop().printPoem(); //a new monkey list and output in one step
}
}
MonkeyLoop.main(null);
public class MonkeyLoop {
public MonkeyLoop() {
// nothing
}
public void printHead(int num) {
String monkeyHead[] = {"ʕง ͠° ͟ل͜ ͡°)ʔ", " ʕ༼ ◕_◕ ༽ʔ", " ʕ(▀ ⍡ ▀)ʔ", " ʕ ͡° ͜ʖ ° ͡ʔ", " (◕‿◕✿)"};
System.out.print(monkeyHead[num]);
}
public void printNeck(int num) {
String monkeyNeck[] = {" \\_⏄_/ ", " \\_⎏_/ ", " \\_⎐_/ ", " \\_⍾_/ ", " \\_⍾_/ "};
System.out.print(monkeyNeck[num]);
}
public void printBody(int num) {
String monkeyBody[] = {" --0-- ", " ++1++ ", " <-2-> ", " ==3== ", " ==4== "};
System.out.print(monkeyBody[num]);
}
public void printLegs(int num) {
String monkeyLegs[] = {" ⎛ ⎞ ", " ⌋ ⌊ ", " 〈 〉 ", " _/ \\_ ", " _/ \\_ "};
System.out.print(monkeyLegs[num]);
}
public static void main(String[] args) {
MonkeyLoop monkeyPrint = new MonkeyLoop();
for (int verse = 5; verse > 0; verse--) {
System.out.println(verse + " little monkeys jumping on the bed.");
for (int i = 0; i < verse; i++) {
monkeyPrint.printHead(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printNeck(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printBody(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printLegs(i);
}
System.out.println("");
}
}
}
MonkeyLoop.main(null);
How to access arrays?
If you want to access individual elements within an array, you can access them with arrayName[row index][column index].
What if I want to print all of the contents in an array?
We can use a for loop to achieve this.
for (int row = 0; row < totalRow; row++) {
for (int column = 0; column < totalColumn; column++) {
System.out.println("arrayEx[row][column]");
}
}public class MonkeyLoop {
public MonkeyLoop() {
// nothing
}
public void printHead(int num) {
String monkeyHead[] = {"ʕง ͠° ͟ل͜ ͡°)ʔ", " ʕ༼ ◕_◕ ༽ʔ", " ʕ(▀ ⍡ ▀)ʔ", " ʕ ͡° ͜ʖ ° ͡ʔ", " (◕‿◕✿)"};
System.out.print(monkeyHead[num]);
}
public void printNeck(int num) {
String monkeyNeck[] = {" \\_⏄_/ ", " \\_⎏_/ ", " \\_⎐_/ ", " \\_⍾_/ ", " \\_⍾_/ "};
System.out.print(monkeyNeck[num]);
}
public void printBody(int num) {
String monkeyBody[] = {" --0-- ", " ++1++ ", " <-2-> ", " ==3== ", " ==4== "};
System.out.print(monkeyBody[num]);
}
public void printLegs(int num) {
String monkeyLegs[] = {" ⎛ ⎞ ", " ⌋ ⌊ ", " 〈 〉 ", " _/ \\_ ", " _/ \\_ "};
System.out.print(monkeyLegs[num]);
}
public void doctor(int num) {
String doctorMsg[] = {".----.", "===(_)== No more monkeys jumping on the bed!", "// 6 6 \\ /", "( 7 )", "\\ '--' /", "\\_ ._/", "__) (__"};
System.out.println(doctorMsg[num]);
}
public static void main(String[] args) {
MonkeyLoop monkeyPrint = new MonkeyLoop();
MonkeyLoop doctorText = new MonkeyLoop();
for (int verse = 5; verse > 0; verse--) {
System.out.println(verse + " little monkeys jumping on the bed.");
for (int i = 0; i < verse; i++) {
monkeyPrint.printHead(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printNeck(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printBody(i);
}
System.out.println("");
for (int i = 0; i < verse; i++) {
monkeyPrint.printLegs(i);
}
System.out.println("");
System.out.println("One fell off and bumped his head.");
System.out.println("εミ(×。×)ο");
System.out.println("Mama called the doctor and the doctor said");
for (int i = 0; i < 7; i++){
doctorText.doctor(i);
}
System.out.println("");
}
System.out.println("oof");
}
}
MonkeyLoop.main(null);