[英]Write a program using 1-D arrays with values from a random generator to print out how many times each combination was rolled by a pair of dice
[英]Random combination of strings using arrays
我正在試圖弄清楚如何組合用戶輸入的2個隨機字符串。 這個節目有點像瘋狂的自由游戲,但它是用來創作一首詩。 我首先要求用戶輸入要使用的名詞數量,然后將它們存儲到數組中,然后詢問形容詞的數量,這些形容詞也存儲在數組中。
確切地說,問題如下:
通過選擇名詞和形容詞的隨機組合來產生你的詩。 在分別使用用戶提供的所有名詞和形容詞組之前,不允許再次選擇名詞或形容詞。
現在我被要求通過組合輸入的名詞和形容詞來生成一首詩,但是生成器需要是隨機的。 我該怎么做? 到目前為止,我的計划如下:
import java.util.Scanner;
public class A3Question1
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
boolean loop1 = false;
boolean loop2 = false;
boolean loop3 = false;
int numNouns = 0, numAdjectives = 0;
String[] nouns = new String[numNouns];
String[] adjectives = new String[numAdjectives];
System.out.println("-----------------------------------------");
System.out.println(" Let's write a poem! ");
System.out.println("-----------------------------------------");
System.out.println();
while (!loop1)
{
System.out.print("How many nouns? (min 3): ");
numNouns = keyboard.nextInt();
if (numNouns < 3)
{
continue;
}
else
{
loop1 = true;
}
System.out.println("Enter " + numNouns + " nouns: ");
nouns = new String[numNouns];
for (int i = 0; i < numNouns; i++)
{
nouns[i] = keyboard.next();
}
}
while (!loop2)
{
System.out.print("How many adjectives? (min 3): ");
numAdjectives = keyboard.nextInt();
if (numAdjectives < 3)
{
continue;
}
else
{
loop2 = true;
}
System.out.println("Enter " + numAdjectives + " adjectives: ");
adjectives = new String[numAdjectives];
for (int j = 0; j < numAdjectives; j++)
{
adjectives[j] = keyboard.next();
}
while (!loop3)
{
System.out.println("\n-----------------------------------");
System.out.println(" Here is my Java Poem! ");
System.out.println(" **LOOK AROUND** ");
System.out.println("-----------------------------------");
System.out.println();
for (int i = 0; i < numNouns && i < numAdjectives; i++)
{
int num1 = (int) (Math.random() * numNouns);
int num2 = (int) (Math.random() * numAdjectives);
System.out.println(nouns[num1] + adjectives[num2]);
}
System.out.println("\nAnother poem? (y/n): ");
String again = keyboard.next();
if (again.charAt(0) == 121 || again.charAt(0) == 89)
{
continue;
}
else
{
loop3 = true;
}
}
System.out.println("Thank you for using POEM GENERATOR! Have a good day!");
}
keyboard.close();
}
}
樣本輸出:
https://postimg.org/image/6ogwggw9f/
編輯**:我清理了代碼並將數組隨機組合在一起。 但是,生成的隨機數組不能再次重用,我試圖弄清楚如何避免這個問題。 如圖所示,我還需要正確縮進這首詩。 例如,第一個輸出沒有空格,第二個輸出有一個選項卡,第三個輸出有兩個選項卡。
使用Random
對象選擇數組中的隨機索引。 第二個隨機可以選擇是否應該從中挑選名詞或形容詞數組。
public String randomPoem(String[] nouns, String[] adjectives) {
Random random = new Random();
ArrayList<String> nounList = new ArrayList<>(Arrays.asList(nouns));
ArrayList<String> adjList = new ArrayList<>(Arrays.asList(adjectives));
String value = "";
if (random.nextBoolean()) {
int index = random.nextInt(nounList.size());
value += nounList.remove(index);
} else {
int index = random.nextInt(adjList.size());
value += adjList.remove(index);
}
return value;
}
您必須將數組隨機化。 一個簡單的方法是選擇數組中的任何2個元素並相互交換。 做足夠多次,你將有一個隨機陣列。
這是一個樣本
package com.example;
import java.util.Random;
public class RandomTest {
public static void main(String[] args) {
String[] nouns = {"roses", "tulips", "grass"};
shuffle(nouns, 50);
String[] adjectives = {"red", "lovely", "gorgeous", "green"};
shuffle(adjectives, 50);
for(int i = 0; i < nouns.length && i < adjectives.length; i++) {
System.out.println(adjectives[i] + " " + nouns[i]);
}
}
public static void shuffle(String[] list, int swapCount) {
Random random = new Random();
for(int i = 0; i < swapCount; i++) {
int index1 = random.nextInt(list.length);
int index2 = random.nextInt(list.length);
//Swap these two with each other
String temp = list[index1];
list[index1] = list[index2];
list[index2] = temp;
}
}
}
連續運行輸出
lovely tulips
gorgeous roses
red grass
lovely grass
gorgeous tulips
green roses
lovely tulips
red roses
green grass
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.