CreativeXtent
Reputation: 59
How i should store array from a multidimensional array with user input
yes, this is my homework. But i am stuck and have been for days. (horrible teacher, horrible lessons. this teacher will never respond to me or anyone about anything)
I have seen something like this on here before but never seen or understood their answers.
In this program, the user inputs a state, then it outputs the states bird and its flower. after the user types none, it should give them a summery of everything they typed in a row. State, Bird, Flower. I have not a clue how to do this... You do not have to tell me how, that is fine. but could you please guide me, in a non vague way haha.
import java.util.Scanner;
public class TheStatesTester {
public static void main(String[] args) {
String theState [][] = {
{"Alabama", "Northern Flicker","Camelia"},
{"Alaska", "Willow PTarmigan","ForgetMeNot"},
{"Arizona", "Cactus Wren","Saguaro Cactus Blossom"},
{"Arkansas", "Mockingbird","Apple Blossom"},
{"California", "California Quail","California Blossom"},
{"Colorado", "Lark Bunting","Rocking Mountain Columbine"},
{"Connecticut", "American Robin","Mountain Laurel"},
{"Delaware", "Blue Hen Chicken","Peach Blossom"},
{"Flordia", "Mockingbird","Orange Blossom"},
{"Georgia", "Brown Thrasher","Cherokee Rose"},
{"Hawaii", "Nene","Hibiscus"},
{"Idaho", "Peregrine Falcon","Mock Orange"},
{"Illinois", " Northern Cardinal","Purple Violet"},
{"Indiana", "Northern Cardinal","Peony"},
{"Iowa", "Eastern Goldrinch","Wild Prairie Rose"},
{"Kansas", "Western Meadowlark","Sunflower"},
{"Kentucky", "Northen Cardinal","Golden Rod"},
{"Louisiana", "Brown Pelican","Magnolia"},
{"Maine", "Black-capped Chickadee","White Pine Tassel and Cone"},
{"Maryland", "Baltimore Oriole","Black-Eyes Susan"},
{"Massachusetts", "Black-Capped Chickadee","Mayflower"},
{"Michigan", "Robin Redbreast","Apple Blossom"},
{"Minnesota", "Common Loon","Pink and White ladyslipper"},
{"Mississippi", "Wood Duck","Magnolia"},
{"Missouri", "Eastern Bluebird","Hawthorn"},
{"Montana", "Western Meadowlark","Bitterroot"},
{"Nebraska", "Western Medowlark","Goldenrod"},
{"Nevada", "Mountain Bluebird","Sagebush"},
{"New Hampshire", "Purple Finch","Purple Lilac"},
{"New Jersey", "Eastern Goldfinch","Violet"},
{"New Mexico", "Roadrunner","Yucca"},
{"New York", "Bluebird","Rose"},
{"North Carolina", "Cardinal","Flowering Dogwood"},
{"North Dakota", "Western Meadowlark","Wild Prairie Rose"},
{"Ohio", "Cardinal","Scarlet Carnation"},
{"Oklahoma", "Scissor-tailed Flycatcher","Mistletoe"},
{"Oregon", "Western Medowlark","Orange Grape"},
{"Pennsylvania", "Ruffed Grouse","Mountain Laurel"},
{"Rhode Island", "Rhode Island Red","Violet"},
{"South Carolina", "Great Carolina Wren","Yellow Jessamine"},
{"South Dakota", "Ring-necked Pheasant","Pasque Flower"},
{"Tennessee", "Mocking Bird","Iris"},
{"Texas", "Mocking Bird","Texas Bluebonnet"},
{"Utah", "Common American Gull","Sego Lily"},
{"Vermont", "Hermit Thrush","Red Clover"},
{"Virginia", "Cardinal","Flowering Dogwood"},
{"Washington", "Willow Goldfinch","Coast Rhodoendron"},
{"West Virginia", "Cardinal","Rhododendron"},
{"Wisconsin", "Robin","Violet"},
{"Wyoming", "Western Medowlark","Indian Paintbrush"},
};
Scanner input1 = new Scanner(System.in);
while (true) {
System.out.println("Enter a State or None to exit: ");
String states = input1.nextLine();
int position=getBirdFlower(theState, states);
if (states.trim().equalsIgnoreCase("None")){
System.out.println("**** Thank you *****\r\n" +
"A summary report for each State, Bird, and Flower is: " );
break;
}
else {
if(position!=-1)
{
System.out.println("Bird: "+theState[position][1]);
System.out.println("Flower: "+theState[position][2]);
}
else
System.out.println("Invalid state entered");
// for (int i=0; i<state.length;i)
// for (int j=0;j<state[i].length;j)
// System.out.println(state[i][j]);
}
}
}
public static int getBirdFlower(String theState[][], String state)
{
int position = -1;
boolean found=false;
for (int index = 0; index < theState.length && !found; index++)
{
if(theState[index][0].equalsIgnoreCase(state))
position = index;
}
return position;
}
}
Upvotes: 1
Views: 369
Answers (2)
drowny
Reputation: 2147
I added some comment to your code for understand clearly. Please read carefully.
import java.util.ArrayList;
import java.util.Scanner;
public class TheStatesTester {
public static void main(String[] args) {
String theState[][] = {
{"Alabama", "Northern Flicker", "Camelia"},
{"Alaska", "Willow PTarmigan", "ForgetMeNot"},
{"Arizona", "Cactus Wren", "Saguaro Cactus Blossom"},
{"Arkansas", "Mockingbird", "Apple Blossom"},
{"California", "California Quail", "California Blossom"},
{"Colorado", "Lark Bunting", "Rocking Mountain Columbine"},
{"Connecticut", "American Robin", "Mountain Laurel"},
{"Delaware", "Blue Hen Chicken", "Peach Blossom"},
{"Flordia", "Mockingbird", "Orange Blossom"},
{"Georgia", "Brown Thrasher", "Cherokee Rose"},
{"Hawaii", "Nene", "Hibiscus"},
{"Idaho", "Peregrine Falcon", "Mock Orange"},
{"Illinois", " Northern Cardinal", "Purple Violet"},
{"Indiana", "Northern Cardinal", "Peony"},
{"Iowa", "Eastern Goldrinch", "Wild Prairie Rose"},
{"Kansas", "Western Meadowlark", "Sunflower"},
{"Kentucky", "Northen Cardinal", "Golden Rod"},
{"Louisiana", "Brown Pelican", "Magnolia"},
{"Maine", "Black-capped Chickadee", "White Pine Tassel and Cone"},
{"Maryland", "Baltimore Oriole", "Black-Eyes Susan"},
{"Massachusetts", "Black-Capped Chickadee", "Mayflower"},
{"Michigan", "Robin Redbreast", "Apple Blossom"},
{"Minnesota", "Common Loon", "Pink and White ladyslipper"},
{"Mississippi", "Wood Duck", "Magnolia"},
{"Missouri", "Eastern Bluebird", "Hawthorn"},
{"Montana", "Western Meadowlark", "Bitterroot"},
{"Nebraska", "Western Medowlark", "Goldenrod"},
{"Nevada", "Mountain Bluebird", "Sagebush"},
{"New Hampshire", "Purple Finch", "Purple Lilac"},
{"New Jersey", "Eastern Goldfinch", "Violet"},
{"New Mexico", "Roadrunner", "Yucca"},
{"New York", "Bluebird", "Rose"},
{"North Carolina", "Cardinal", "Flowering Dogwood"},
{"North Dakota", "Western Meadowlark", "Wild Prairie Rose"},
{"Ohio", "Cardinal", "Scarlet Carnation"},
{"Oklahoma", "Scissor-tailed Flycatcher", "Mistletoe"},
{"Oregon", "Western Medowlark", "Orange Grape"},
{"Pennsylvania", "Ruffed Grouse", "Mountain Laurel"},
{"Rhode Island", "Rhode Island Red", "Violet"},
{"South Carolina", "Great Carolina Wren", "Yellow Jessamine"},
{"South Dakota", "Ring-necked Pheasant", "Pasque Flower"},
{"Tennessee", "Mocking Bird", "Iris"},
{"Texas", "Mocking Bird", "Texas Bluebonnet"},
{"Utah", "Common American Gull", "Sego Lily"},
{"Vermont", "Hermit Thrush", "Red Clover"},
{"Virginia", "Cardinal", "Flowering Dogwood"},
{"Washington", "Willow Goldfinch", "Coast Rhodoendron"},
{"West Virginia", "Cardinal", "Rhododendron"},
{"Wisconsin", "Robin", "Violet"},
{"Wyoming", "Western Medowlark", "Indian Paintbrush"},
};
Scanner input1 = new Scanner(System.in);
ArrayList<String> userInputStates = new ArrayList<>();
while (true) {
System.out.println("Enter a State or None to exit: ");
String states = input1.nextLine();
if (states.trim().equalsIgnoreCase("None")) {
System.out.println("**** Thank you *****\r\n" +
"A summary report for each State, Bird, and Flower is: ");
//printing the userList
printUserList(userInputStates);
break;
} else {
//I moved this getBirdFlower method call to heere, because if not none , call from here
int position = getBirdFlower(theState, states);
if (position != -1) {
System.out.println("Bird: " + theState[position][1]);
System.out.println("Flower: " + theState[position][2]);
//Add user's found properties to arrayList.
userInputStates.add("- State: " + theState[position][0] + " Bird: " + theState[position][1] + " Flower: " + theState[position][2]);
} else
System.out.println("Invalid state entered");
}
}
}
private static void printUserList(ArrayList<String> userInputStates) {
//print userInputStates.
for (String userState : userInputStates) {
System.out.println(userState);
}
}
public static int getBirdFlower(String theState[][], String state) {
//you dont need to keep boolean , if found -> return current index
for (int index = 0; index < theState.length; index++) {
if (theState[index][0].equalsIgnoreCase(state))
return index;
}
//if not found, return -1
return -1;
}
}
Sample output from code ;
Enter a State or None to exit: Wyoming Bird: Western Medowlark Flower: Indian Paintbrush Enter a State or None to exit: Utah Bird: Common American Gull Flower: Sego Lily Enter a State or None to exit: InvalidState Invalid state entered Enter a State or None to exit: none **** Thank you ***** A summary report for each State, Bird, and Flower is: - State: Wyoming Bird: Western Medowlark Flower: Indian Paintbrush - State: Utah Bird: Common American Gull Flower: Sego Lily
Upvotes: 1
Charles
Reputation: 954
The trick is to store the user input as he types it. In this case I made my life easier by using an ArrayList but this can be done with normal arrays as well but there is more work managing the array. I also added some comment explaining each step.
public class TheStatesTester {
public static void main(String[] args) {
String theStates[][] = { { "Alabama", "Northern Flicker", "Camelia" },
{ "Alaska", "Willow PTarmigan", "ForgetMeNot" }, { "Arizona", "Cactus Wren", "Saguaro Cactus Blossom" },
{ "Arkansas", "Mockingbird", "Apple Blossom" },
{ "California", "California Quail", "California Blossom" },
{ "Colorado", "Lark Bunting", "Rocking Mountain Columbine" },
{ "Connecticut", "American Robin", "Mountain Laurel" },
{ "Delaware", "Blue Hen Chicken", "Peach Blossom" }, { "Flordia", "Mockingbird", "Orange Blossom" },
{ "Georgia", "Brown Thrasher", "Cherokee Rose" }, { "Hawaii", "Nene", "Hibiscus" },
{ "Idaho", "Peregrine Falcon", "Mock Orange" }, { "Illinois", " Northern Cardinal", "Purple Violet" },
{ "Indiana", "Northern Cardinal", "Peony" }, { "Iowa", "Eastern Goldrinch", "Wild Prairie Rose" },
{ "Kansas", "Western Meadowlark", "Sunflower" }, { "Kentucky", "Northen Cardinal", "Golden Rod" },
{ "Louisiana", "Brown Pelican", "Magnolia" },
{ "Maine", "Black-capped Chickadee", "White Pine Tassel and Cone" },
{ "Maryland", "Baltimore Oriole", "Black-Eyes Susan" },
{ "Massachusetts", "Black-Capped Chickadee", "Mayflower" },
{ "Michigan", "Robin Redbreast", "Apple Blossom" },
{ "Minnesota", "Common Loon", "Pink and White ladyslipper" },
{ "Mississippi", "Wood Duck", "Magnolia" }, { "Missouri", "Eastern Bluebird", "Hawthorn" },
{ "Montana", "Western Meadowlark", "Bitterroot" }, { "Nebraska", "Western Medowlark", "Goldenrod" },
{ "Nevada", "Mountain Bluebird", "Sagebush" }, { "New Hampshire", "Purple Finch", "Purple Lilac" },
{ "New Jersey", "Eastern Goldfinch", "Violet" }, { "New Mexico", "Roadrunner", "Yucca" },
{ "New York", "Bluebird", "Rose" }, { "North Carolina", "Cardinal", "Flowering Dogwood" },
{ "North Dakota", "Western Meadowlark", "Wild Prairie Rose" },
{ "Ohio", "Cardinal", "Scarlet Carnation" }, { "Oklahoma", "Scissor-tailed Flycatcher", "Mistletoe" },
{ "Oregon", "Western Medowlark", "Orange Grape" },
{ "Pennsylvania", "Ruffed Grouse", "Mountain Laurel" },
{ "Rhode Island", "Rhode Island Red", "Violet" },
{ "South Carolina", "Great Carolina Wren", "Yellow Jessamine" },
{ "South Dakota", "Ring-necked Pheasant", "Pasque Flower" }, { "Tennessee", "Mocking Bird", "Iris" },
{ "Texas", "Mocking Bird", "Texas Bluebonnet" }, { "Utah", "Common American Gull", "Sego Lily" },
{ "Vermont", "Hermit Thrush", "Red Clover" }, { "Virginia", "Cardinal", "Flowering Dogwood" },
{ "Washington", "Willow Goldfinch", "Coast Rhodoendron" },
{ "West Virginia", "Cardinal", "Rhododendron" }, { "Wisconsin", "Robin", "Violet" },
{ "Wyoming", "Western Medowlark", "Indian Paintbrush" },
};
Scanner scanner = new Scanner(System.in);
ArrayList<String> visitedStates = new ArrayList<>();//using this to store the states already asked.
while (true) {//loop forever... i'm not a fan of this
System.out.println("Enter a State or None to exit: ");
String state = scanner.nextLine().trim();//remove extra spaces and set the state
if ("None".equalsIgnoreCase(state)) {//check if user is done
System.out
.println("**** Thank you *****\r\n" + "A summary report for each State, Bird, and Flower is: ");
for(String vistedState : visitedStates) {//loop though all the visited states
int stateIndex = getStateIndex(theStates, vistedState);//find the index of the visited states
System.out.println(Arrays.toString(theStates[stateIndex]));//print out the info for the state
}
break;//exit the while loop
} else {//if the user is not done
int position = getStateIndex(theStates, state);//find the state index
if (position != -1) {//make sure it's a valid input
System.out.println("Bird: " + theStates[position][1]);//print out the bird
System.out.println("Flower: " + theStates[position][2]);//print out the flower
visitedStates.add(state);//add it to the list of visited states
} else {
System.out.println("Invalid state entered");//bad input we don't print and don't store
}
}
}
}
public static int getStateIndex(String theState[][], String state) {
int position = -1;
boolean found = false;
for (int index = 0; index < theState.length && !found; index++) {
if (theState[index][0].equalsIgnoreCase(state))
position = index;
}
return position;
}
}
Sample output:
Enter a State or None to exit:
Idaho
Bird: Peregrine Falcon
Flower: Mock Orange
Enter a State or None to exit:
Nevada
Bird: Mountain Bluebird
Flower: Sagebush
Enter a State or None to exit:
None
**** Thank you *****
A summary report for each State, Bird, and Flower is:
[Idaho, Peregrine Falcon, Mock Orange]
[Nevada, Mountain Bluebird, Sagebush]
Upvotes: 0
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