I am trying to iterate a string that contains the users inputed values. I want to validate that the user only enters 4 characters and that all of them are between 1 and 4. For example, prompts the user to enter 4 values using commas, therefore they can only enter 1,2,3,4. If they enter anything else, then they will be asked again. I have included the section of my code where I am trying to perform the validation. I am also experiencing an unreachable code error which does not make sense to me. This takes place after I close the while (true) loop.
//Entering by ROWS
//This is for a 4x4 board size using rows
if (dataSelection == 1) {
if (boardSize == 1) {
int row = 1;
while (row < 5)
{
String row1Values4x4 = "-1";
while (true)
{
Scanner firstRow4x4 = new Scanner(System.in);
System.out.println("Please enter four values using commas for row " + row); //this needs to loop
row1Values4x4 = firstRow4x4.next();
row1Values4x4 = row1Values4x4.replaceAll(" ",""); //this is in case user enters numbers with spaces
for (int i = 0; i < row1Values4x4.length(); i++) {
char c = row1Values4x4.charAt(i);
if (row1Values4x4.length() == 7 && c == 48) //I entered 48 in order to test if it is using ascii value (48 = 0) {
break;
}
}
} //I think I need to include another break in order to escape the second loop?
String strArray[] = row1Values4x4.split(","); //This is where I get an unreachable code error
int arraySidesInteger[] = new int[strArray.length];
for (int i = 0; i < strArray.length; i++) {
arraySidesInteger[i] = Integer.parseInt(strArray[i]);
}
fourArray[row-1] = arraySidesInteger;
for (int i = 0; i < fourArray.length; i++) {
for (int j = 0; j < fourArray.length; j++)
System.out.print(fourArray[i][j] + " ");
System.out.println();
}
row++;
}
Please let me know if there
Your comment is right; you need a second break
in there. The break
that exists only breaks out of the for
loop, but not the while
loop.
Perhaps instead of
while (true)
{
// do some stuff
for (/* some other stuff */)
{
// even more stuff
if (/* should we break */)
{
break;
}
}
}
you could try something like
boolean done = false;
while (!done)
{
// do some stuff
for (/* some other stuff */)
{
// even more stuff
if (/* should we break */)
{
done = true;
break;
}
}
}
Why not use the split method in strings
String s = userInput;
String[] inputArray = s.split(",");
for(int i = 0; i < inputArray.length; i++){
// check if the character is correct here
}
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