[英]Randomly filling a 2d array with certain restrictions
因此,我必須用預先確定的單詞隨機填充一個字符串數組,但是每個單詞都有一定數量的限制,可以在數組上使用
這是我編碼的內容,但是它返回一個空數組,我不知道為什么:
package test;
import java.util.Random;
public class Main {
public static void main (String []args){
String [][] array = new String [4][4];
String [] words = new String [6];
int limits[] = new int [4];
int counter[] = {0, 0, 0, 0};
words[0] = "Roberto";
words[1] = "Matias";
words[2] = "Carlitos";
words[3] = "Leonel";
limits[0] = 2;
limits[1] = 3;
limits[2] = 5;
limits[3] = 1;
//when filled its true means that the correspondent word has reached its limits.
boolean filled []= new boolean [4];
filled [0] = false;
filled [1] = false;
filled [2] = false;
filled [3] = false;
Random rnd = new Random();
//not f
boolean notfilled = true;
while(notfilled){
int x = 0, y =0;
for(int i = 0;i<counter.length; i++ ){
if(counter[i]==limits[i]){
filled[i] = true;
}
}
if (filled[0] == true && filled[1] == true && filled[2] == true && filled[3] == true){
notfilled = false;
}
int rndm = rnd.nextInt(4);
switch(rndm){
case 1:{
if(filled[0] != true){
array[x][y] = words[rndm];
}
}
case 2:{
if(filled[1] != true){
array[x][y] = words[rndm];
}
}
case 3:{
if(filled[2] != true){
array[x][y] = words[rndm];
}
}
case 4:{
if(filled[3] != true){
array[x][y] = words[rndm];
}
}
if(x == array.length){
y++;
x = 0;
}else{x++;}
}
}
}
}
質疑其mi代碼有什么問題以及如何解決
您的代碼有幾個問題。 正如Boddington所提到的,您的限制總共需要加16。此外,x和y需要在while循環之外進行初始化,以便不會被重置。
int x = 0, y =0;
boolean notfilled = true;
while(notfilled){
正如Mnemomic所說,案例4將永遠不會執行。 要解決此問題,請在0處開始您的案例,並在每個案例的末尾添加一個中斷。 您的最后一個問題是,如果隨機選擇的單詞用完了,代碼將跳過矩陣中的空格。 要解決此問題,僅當未填充隨機詞時才需要移動x和y
畢竟,您的case語句應如下所示
case 0:{
if(filled[0] != true){
array[x][y] = words[0];
counter[0]++;
x++;
if(x == array.length){
y++;
x = 0;
}
}
break;
}
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