我正在尝试使用用户输入的字符串来填充 Java 中的二维数组。我已经得到了字符串,并且已经弄清楚如何创建数组。我只是无法弄清楚如何将值放入数组中。如果您想知道,是的,我必须使用数组。这是我到目前为止所拥有的:
private static int[][] parseTwoDimension(String strInput)
{
int rows = 0; //number of rows in the string
for (int i = 0; i < strInput.length(); i++)
{
if (strInput.charAt(i) == '!') //the ! is an indicator of a new row
{
rows++;
}
}
int[][] arr = new int[rows][]; //create an array with an unknown number of columns
int elementCounter = 0; //keep track of number of elements
int arrayIndexCounter = 0; //keep track of array index
for (int i = 0; i < strInput.length(); i++)
{
if (strInput.charAt(i) != '!') //while not the end of the row
{
elementCounter++; //increase the element count by one
}
else //reached the end of the row
{
arr[arrayIndexCounter] = new int[elementCounter]; //create a new column at the specified row
elementCounter = 0; //reset the element counter for the next row
arrayIndexCounter++; //increase the array index by one
}
}
/*
This is where I need the help to populate the array
*/
char c; //each character in the string
int stringIndex = -1; //keep track of the index in the string
int num; //the number to add to the array
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
{
stringIndex++; //increment string index for next element
c = strInput.charAt(stringIndex); //the character at stringIndex
if (c == '!') //if it is the end of the row, do nothing
{
}
else //if it is not the end of the row...
{
String s = Character.toString(c); //convert character to String
num = Integer.parseInt(s); //convert String to Integer
arr[i][j] = num; //add Integer to array
}
}
}
return arr; //return a two dimensional array the user defined
}
非常感谢任何帮助:)
最佳答案
我已经编辑了您的代码并将其发布在下面。这是如何解决该问题的概述:
使用 string.split("!") 用分隔符 '!' 分隔字符串。这将返回一个数组
然后,使用 string.split("") 将字符串分割成单个字符
代码贴在下面:
private static int[][] parseTwoDimension(String strInput)
{
String[] rows = strInput.split("!");
int[][] arr = new int[rows.length()][];
for(int i = 0; i < rows.length; i++)
{
String[] elements = rows[i].split("");
int[] intElements = new int[elements.length];
for(int j = 0; j < elements.length; j++)
{
intElements[j] = Integer.parseInt(elements[j]);
}
arr[i] = intElements;
}
}
请告诉我这是否有效。 string.split() 函数在将字符串解析为数组时非常有用
关于java - 如何使用用户输入在 Java 中填充二维数组?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40034493/