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DecimalFormat removes zero after dot

I want to format user's input and it's okay, but when I try to input zero after dot DecimalFormat removes it.
I use the following code:
DecimalFormat df = new DecimalFormat("#,###.##");
Number n = df.parse(v);
amountEdit.setText(df.format(n));
Example Input/Output:
9.0 -> 9.
9.9 -> 9.9
9.90 -> 9.9
It removes zeros!
EDIT:
I have EditText with TextChangedListener
The idea is to format user's input like 999 999 999.99 (this is max value).
amountEdit.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (data.document.isPaymentPossible) {
if (s.toString().contains(String.valueOf(df.getDecimalFormatSymbols().getDecimalSeparator())) || s.toString().contains(".")) {
hasDot = true;
} else {
hasDot = false;
}
}
}
#Override
public void afterTextChanged(Editable s) {
String string = s.toString().replaceAll("\\.", ",");
if (string.equals(",") || string.equals(".")) {
amountEdit.setText("");
return;
}
amountEdit.removeTextChangedListener(this);
payCustomAmount.setEnabled(amountEdit.getText().length() != 0);
try {
if (string.contains(",")) {
try {
String afterDot = string.split(",")[1];
if (afterDot.length() > 2) {
string = string.substring(0, string.length() - 1);
Number n = df.parse(string);
amountEdit.setText(df.format(n).replace(",", "."));
amountEdit.setSelection(amountEdit.getText().length());
amountEdit.addTextChangedListener(this);
showOverPaidText();
return;
}
} catch (Exception e) {
if (BuildConfig.DEBUG) {
SysUtils.logf("PaymentOptions input: " + s + "Exception: " + e);
}
}
} else {
if (string.length() > 11) {
string = string.substring(0, string.length() - 1);
Number n = dfnd.parse(string);
amountEdit.setText(dfnd.format(n));
amountEdit.setSelection(amountEdit.getText().length());
showOverPaidText();
amountEdit.addTextChangedListener(this);
return;
}
}
int inilen, endlen;
inilen = amountEdit.getText().length();
String v = string.replace(String.valueOf(df.getDecimalFormatSymbols().getGroupingSeparator()), "");
int cp = amountEdit.getSelectionStart();
if (hasDot) {
Number n = df.parse(v);
String ss = df.format(n).replace(",", ".");
amountEdit.setText(ss);
} else {
Number n = dfnd.parse(v);
amountEdit.setText(dfnd.format(n));
}
endlen = amountEdit.getText().length();
int sel = (cp + (endlen - inilen));
if (sel > 0 && sel <= amountEdit.getText().length()) {
amountEdit.setSelection(sel);
} else {
amountEdit.setSelection(amountEdit.getText().length() - 1);
}
} catch (NumberFormatException | ParseException e) {
showOverPaidText();
amountEdit.addTextChangedListener(this);
if (BuildConfig.DEBUG) {
SysUtils.logf("PaymentOptions input: " + s + "Exception: " + e);
}
return;
}
showOverPaidText();
amountEdit.addTextChangedListener(this);
return;
}
});
My onCreate contains:
df = new DecimalFormat("#,###.00");
df.setDecimalSeparatorAlwaysShown(true);
dfnd = new DecimalFormat("#,###");
hasDot = false;

It removes zeros!
Well yes, it would - you've specifically used .## which means "only include digits if they're significant". If you want to always have at least one decimal place, use
DecimalFormat df = new DecimalFormat("#,###.0#");
If you always want to have two decimal places, use:
DecimalFormat df = new DecimalFormat("#,###.00");
You should probably consider how you want 0.5 to be formatted, too. Do you want "0.5" or ".5"?

'#' means include this digit if it matters and since 9,0 == 9, the formatting removes it.
If you need a minimum of two digits after decimal then you should replace to format as:
DecimalFormat df = new DecimalFormat("#,###.00");

Decompress a string with more nested strings

The assignment consists in decompress a string. In particular, the code has to work for 3 samples as illustrated in the picture.
My code here works in the first 2 of the samples. However, I am not able to come up with the 3rd sample. Probably I did not understand probably the concept of recursion. Can you help me?
import java.util.Scanner;
public class Compression4 {
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
String input=in.next();
System.out.println(uncompress(input));
}
public static boolean flag = true;
public static String uncompress(String compressedText)
{
return uncompress(compressedText, "", "");
}
public static String getMultiple(String x, int N) {
if (N == 0) return "";
return ""+x+getMultiple(x,N-1);
}
public static String uncompress(String text, String count, String output)
{
if (text.equals(""))
{
return output;
}
if(text.charAt(0) == '(')
{
int FirstIndex = text.indexOf("(")+1;
String inner = text.substring(FirstIndex, text.lastIndexOf(")"));
//System.out.println(inner);
flag = false;
return uncompress (inner, count, output);
}
else if (Character.isLetter(text.charAt(0)))
{
//letter case - need to take the count we have accrued, parse it into an integer and add to output
if (flag==true)
{
//System.out.println(count);// * text.charAt(0);
String s = String.valueOf(text.charAt(0));
output += getMultiple(s,Integer.parseInt(count));
count ="1";
}
else
{
//System.out.println(count);// * text.charAt(0);
output += getMultiple(text,Integer.parseInt(count));
//System.out.println("output: "+output);
count="0";
}
}
else if(Character.isDigit(text.charAt(0)))
{
//digit case - need to add to the count but keep as a string because must be parsed later
if(flag)
count += (""+text.charAt(0));
else
{
count = "0";
count += (""+text.charAt(0));
}
}
//parse the *remainder* of the string, one character at a time, so pass in the substring(1)
return uncompress(text.substring(1), count, output);
}
}

Sorry for the long code but it's more easy to explain with code than with words.
Premise:
I think to the problem as an interpreter of a language to render a string
the language is simple and functional so recursive interpretation is possible
Algorithm phases:
First: tokenize the expression (to work at an higher level of abstraction)
Second: parse the expression just tokenized
Recursion: the logic is based on the syntax of the language. Key concepts of a recursion:
the base cases and the recursive cases
the state necessary to a single recursion (local variables of recursion, those passed as parameters to the recursive method)
the state for the all recursion (global variables of recursion, those read/write in some specific recursion)
I've made many comments to explain what the algorithm is doing. If it's not clear I can explain it better.
import java.util.ArrayList;
import java.util.List;
public class TestStringDecompression {
// simpleExpr examples: a | b | 123a | 123b | 123(a) | 123(ab) | 123(ba) | (ab) | (ba)
// 11ab = aaaaaaaaaaab = = expression = simpleExpr simpleExpr = 11a b
// 4(ab) = abababab = expression = simpleExpr = 4(ab)
// 2(3b3(ab)) = bbbabababbbbababab = expression = compositeExpr = 2 ( simpleExpr simpleExpr ) = 2 ( 3b 3(ab) )
public static void main(String[] args) {
System.out.println(new StringInflater().inflate("11ab"));
System.out.println(new StringInflater().inflate("4(ab)"));
System.out.println(new StringInflater().inflate("2(3b3(ab))"));
}
public static class StringInflater {
// This store the position of the last parsed token
private int posLastParsedToken = 0;
public String inflate(String expression) {
return parse(tokenize(expression), 0, false);
}
/**
* Language tokens:
* <ul>
* <li>literals:
* <ul>
* <li>intLiteral = [0-9]*</li>
* <li>charLiteral = [ab]</li>
* </ul>
* </li>
* <li>separators:
* <ul>
* <li>leftParen = '('</li>
* <li>rightParen = ')'</li>
* </ul>
* </li>
* </ul>
*/
private Object[] tokenize(String expression) {
List<Object> tokens = new ArrayList<Object>();
int i = 0;
while (i < expression.length()) {
if ('0' <= expression.charAt(i) && expression.charAt(i) <= '9') {
String number = "";
while ('0' <= expression.charAt(i) && expression.charAt(i) <= '9' && i < expression.length()) {
number += expression.charAt(i++);
}
tokens.add(Integer.valueOf(number));
} else {
tokens.add(expression.charAt(i++));
}
}
return tokens.toArray(new Object[tokens.size()]);
}
/**
* Language syntax:
* <ul>
* <li>simpleExpr = [intLiteral] charLiteral | [intLiteral] leftParen charLiteral+ rightParen</li>
* <li>compositeExpr = [intLiteral] leftParen (simpleExpr | compositeExpr)+ rightParen</li>
* <li>expression = (simpleExpr | compositeExpr)+</li>
* </ul>
*/
private String parse(Object[] tokens, int pos, boolean nested) {
posLastParsedToken = pos;
String result = "";
if (tokens[pos] instanceof Integer) {
/** it's a intLiteral */
// get quantifier value
int repetition = (int) tokens[pos];
// lookahead for (
if (tokens[pos + 1].equals("(")) {
// composite repetition, it could be:
// simpleExpr: "[intLiteral] leftParen charLiteral+ rightParen"
// compositeExpr: "[intLiteral] leftParen (simpleExpr | compositeExpr)+ rightParen"
result = parse(tokens, pos + 1, true);
} else {
// simple repetition, it could be:
// simpleExpr: [intLiteral] charLiteral
result = parse(tokens, pos + 1, false);
}
result = repeat(result, repetition);
// evaluate the rest of the expression because syntax allows it
if (posLastParsedToken + 1 == tokens.length) {
// end of the expression
return result;
} else {
// there are other simpleExpr or compositeExpr to parse
return result + parse(tokens, posLastParsedToken + 1, false);
}
} else if (tokens[pos].equals('(')) {
/** it's a leftParen */
// an open paren means what follow this token is considered nested (useful for string to treat as char sequence)
return parse(tokens, pos + 1, true);
} else if (tokens[pos].equals(')')) {
/** it's a rightParen */
// a closed paren, nothing to render
return "";
} else {
/** it's a charLiteral */
if (nested) {
// it's nested between paren, so more parsing is requested to consume next charLiteral or next simpleExpr or compositeExpr
return tokens[pos] + parse(tokens, pos + 1, nested);
} else {
// it's not nested between paren, return charLiteral as is
return "" + tokens[pos];
}
}
}
private String repeat(String s, int repetition) {
StringBuilder result = new StringBuilder();
for (int i = 0; i < repetition; i++) {
result.append(s);
}
return result.toString();
}
}
}

How can I format a String number to have commas in android Edit Field

For what function I can use in android to display the number into different formats.
For eg:
If I enter 1000 then it should display like this 1,000.
If I enter 10000 then it should display like this 10,000.
If I enter 1000000 then it should display like this 1,000,000.
Please guide me.

You could use DecimalFormat and just format the number
DecimalFormat formatter = new DecimalFormat("#,###,###");
String yourFormattedString = formatter.format(100000);
The result will be
1,000,000 for 1000000
10,000 for 10000
1,000 for 1000
Update 12/02/2019
This String.format("%,d", number) would be a better(less hardcoded) solution as indicated in the comments below by #DreaminginCode so I thought I would add it here as an alternative

try this one hope it will help.
System.out.println(NumberFormat.getNumberInstance(Locale.US).format(1000));

private String getFormatedAmount(int amount){
return NumberFormat.getNumberInstance(Locale.US).format(amount);
}

int[] numbersToFormat = new int[]
{ 1, 10, 100, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
for (int number : numbersToFormat) {
System.out.println(
NumberFormat.getNumberInstance(Locale.getDefault()).format(number));
}
OUTPUT
1
10
100
10,000
100,000
1,000,000
10,000,000
100,000,000
1,000,000,000

Add this function in common class
public static String getFormatedNumber(String number){
if(!number.isEmpty()) {
double val = Double.parseDouble(number);
return NumberFormat.getNumberInstance(Locale.US).format(val);
}else{
return "0";
}
}
And use that function every where like this:
String newNumber = Utils.getFormatedNumber("10000000");

You can use Numberformat
public static double getNumberByString(String s) throws ParseException {
return NumberFormat.getInstance(Locale.getDefault()).parse(s).doubleValue();
}

Add a text change listener as below (Also make sure that the input type selected for Edittext is Number) :
etTest.addTextChangedListener(new TextWatcher() {
boolean isManualChange = false;
#Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
if (isManualChange) {
isManualChange = false;
return;
}
try {
String value = s.toString().replace(",", "");
String reverseValue = new StringBuilder(value).reverse()
.toString();
StringBuilder finalValue = new StringBuilder();
for (int i = 1; i <= reverseValue.length(); i++) {
char val = reverseValue.charAt(i - 1);
finalValue.append(val);
if (i % 3 == 0 && i != reverseValue.length() && i > 0) {
finalValue.append(",");
}
}
isManualChange = true;
etTest.setText(finalValue.reverse());
etTest.setSelection(finalValue.length());
} catch (Exception e) {
// Do nothing since not a number
}
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});

public static String formatNumber(int number){
return NumberFormat.getNumberInstance(Locale.getDefault()).format(number);
}
public static String formatNumber(String number){
return NumberFormat.getNumberInstance(Locale.getDefault()).format(Integer.parseInt(number));
}

I wrote this Kotlin extension function may can help.
fun String.formatPoint(): String {
val sb = StringBuilder()
this.reversed().forEachIndexed { index, c ->
// 123,123,123
if ((index + 1) % 3 == 0) {
if (index != this.length - 1) {
sb.append("$c,")
} else {
sb.append(c)
}
} else {
sb.append(c)
}
}
return sb.toString().reversed()
}

Recommended and preferred way is to do it with the strings.xml file
<string name="format_denominated">%,d</string>
from your Kotlin/Java code
getResources().getString(R.string.format_denominated, value)
Even better with databinding
<TextView
android:text="#{#string/format_denominated(value)}"
............/>

How can I parse ASCII Art to HTML using Java or Javascript? [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I saw that the Neo4j API uses ASCII Art very cleverly with its API:
http://jaxenter.com/getting-started-with-neo4j-the-java-graph-database-47955.html
I want to try something similar, but with ASCI Art to HTML. How can ASCII art be parsed, so for example, given an ASCII Art input something like:
--------------------------------
I I
I ------- ------- I
I I I I I I
I I A I I B I I
I I I I I I
I ------- ------- I
I I
I I
--------------------------------
: could result in HTML output something like:
<div>
<div style='display:inline;'>
A
</div>
<div style='display:inline;'>
B
</div>
</div>
Update
The question was closed citing that I need to "demonstrate a minimal understanding of the problem being solved.". I do have an understanding of the problem to be solved. The problem is that I want to solve is to make templated HTML easier to understand in source code for the following web framework:
https://github.com/zubairq/coils
: although the solution could be applied to any web framework. I have since seen someone attempt to make an initial version in C++ here:
https://github.com/h3nr1x/asciidivs2html/blob/master/asciidivs2html.cpp
: very impressive! If you can get it to work in Java or Clojure then if we can get the question reopened I will nominate a bounty so you can get more points for the solution :)
I ran the Java solution provided by #meewok and here is the result:
$ java AsciiToDIVs.RunConverter
Created a box(ID=0,X=0,Y=0,width=33,height=10)
Created a box(ID=1,X=2,Y=4,width=8,height=5,parent=0)
Created a char(Char=A,X=4,Y=7,parent=1)
Created a box(ID=2,X=2,Y=21,width=8,height=5,parent=0)
Created a char(Char=B,X=4,Y=24,parent=2)
<div><div><div>A</div></div><div><div>B</div></div></div>

Methodology
A solution to implement is the following:
create an in memory 2D array (array of arrays) which is similar to a chessboard.
Then i will create an algorith that when it detects "-" characters, i initialize acall to a method to detect the remaining corners ( top right, bottom left, bottom right) following the characters and where they end.
Example ( quick pseudocode ):
while(selectedCell==I)
selectedCell=selectedCell.goDown();
Using such a strategy you can map out your boxes and which boxes are contained within which.
Remaining would be to print this info as html..
Quick and Dirty Implementation
Since I was in the mood I spent an hour+ to quickly cook up a toy implementation.
The below is non-optimized in respect to that I do not make use of Iterators to go over Cells, and would need refactoring to become a serious framework.
Cell.java
package AsciiToDIVs;
public class Cell {
public char Character;
public CellGrid parentGrid;
private int rowIndex;
private int colIndex;
public Cell(char Character, CellGrid parent, int rowIndex, int colIndex)
{
this.Character = Character;
this.parentGrid = parent;
this.rowIndex = rowIndex;
this.colIndex = colIndex;
}
public int getRowIndex() {
return rowIndex;
}
public int getColIndex() {
return colIndex;
}
}
CellGrid.java
package AsciiToDIVs;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
public class CellGrid {
private ArrayList<ArrayList<Cell>> CellGridData;
public CellGrid(String asciiFile) throws IOException {
readDataFile(asciiFile);
}
public ArrayList<FoundObject> findBoxes(FoundBoxObject parent)
{
int startRowIndex = 0, startColIndex = 0,
parentRowLimit = Integer.MAX_VALUE,
parentColLimit = Integer.MAX_VALUE,
startingColIndex = 0;
if(parent != null)
{
startRowIndex = parent.getRowIndex()+1;
startColIndex = startingColIndex = parent.getColIndex()+1;
parentRowLimit = parent.getRowIndex() + parent.getHeight();
parentColLimit = parent.getColIndex() + parent.getWidth();
}
ArrayList<FoundObject> results = new ArrayList<FoundObject>();
Cell currentCell;
if(startRowIndex>=CellGridData.size())
return null;
for(; startRowIndex<CellGridData.size() && startRowIndex<parentRowLimit; startRowIndex++ )
{
startColIndex = startingColIndex;
for(; startColIndex< CellGridData.get(startRowIndex).size() && startColIndex<parentColLimit; startColIndex++)
{
FoundBoxObject withinBox = checkWithinFoundBoxObject(results, startRowIndex, startColIndex);
if(withinBox !=null)
startColIndex+=withinBox.getWidth();
currentCell = getCell(startRowIndex, startColIndex);
if(currentCell!=null)
{
if(currentCell.Character == '-') // Found a TOP-CORNER
{
int boxHeight = getConsecutiveIs(startRowIndex+1, startColIndex) + 1;
if(boxHeight>1)
{
int boxWidth = getConsecutiveDashes(startRowIndex, startColIndex);
FoundBoxObject box = new FoundBoxObject(startRowIndex, startColIndex, boxWidth, boxHeight, parent);
results.add(box);
findBoxes(box);
startColIndex+=boxWidth;
}
}
//This is a character
else if(currentCell.Character != '-' && currentCell.Character != 'I' && currentCell.Character != ' '
&& currentCell.Character != '\n' && currentCell.Character != '\n' && currentCell.Character != '\t')
{
FoundCharObject Char = new FoundCharObject(startRowIndex, startColIndex, parent, currentCell.Character);
results.add(Char);
}
}
}
}
if(parent!=null)
parent.containedObjects = results;
return results;
}
public static String printDIV(ArrayList<FoundObject> objects)
{
String result = "";
Iterator<FoundObject> it = objects.iterator();
FoundObject fo;
while(it.hasNext())
{
result+="<div>";
fo = it.next();
if(fo instanceof FoundCharObject)
{
FoundCharObject fc = (FoundCharObject)fo;
result+=fc.getChar();
}
if(fo instanceof FoundBoxObject)
{
FoundBoxObject fb = (FoundBoxObject)fo;
result+=printDIV(fb.containedObjects);
}
result+="</div>";
}
return result;
}
private FoundBoxObject checkWithinFoundBoxObject(ArrayList<FoundObject> results, int rowIndex, int colIndex)
{
Iterator<FoundObject> it = results.iterator();
FoundObject f;
FoundBoxObject fbox = null;
while(it.hasNext())
{
f = it.next();
if(f instanceof FoundBoxObject)
{
fbox = (FoundBoxObject) f;
if(rowIndex >= fbox.getRowIndex() && rowIndex <= fbox.getRowIndex() + fbox.getHeight())
{
if(colIndex >= fbox.getColIndex() && colIndex <= fbox.getColIndex() + fbox.getWidth())
{
return fbox;
}
}
}
}
return null;
}
private int getConsecutiveDashes(int startRowIndex, int startColIndex)
{
int counter = 0;
Cell cell = getCell(startRowIndex, startColIndex);
while( cell!=null && cell.Character =='-')
{
counter++;
cell = getCell(startRowIndex, startColIndex++);
}
return counter;
}
private int getConsecutiveIs(int startRowIndex, int startColIndex)
{
int counter = 0;
Cell cell = getCell(startRowIndex, startColIndex);
while( cell!=null && cell.Character =='I')
{
counter++;
cell = getCell(startRowIndex++, startColIndex);
}
return counter;
}
public Cell getCell(int rowIndex, int columnIndex)
{
ArrayList<Cell> row;
if(rowIndex<CellGridData.size())
row = CellGridData.get(rowIndex);
else return null;
Cell cell = null;
if(row!=null){
if(columnIndex<row.size())
cell = row.get(columnIndex);
}
return cell;
}
public Iterator<ArrayList<Cell>> getRowGridIterator(int StartRow) {
Iterator<ArrayList<Cell>> itRow = CellGridData.iterator();
int CurrentRow = 0;
while (itRow.hasNext()) {
// Itrate to Row
if (CurrentRow++ < StartRow)
itRow.next();
}
return itRow;
}
private void readDataFile(String asciiFile) throws IOException {
CellGridData = new ArrayList<ArrayList<Cell>>();
ArrayList<Cell> row;
FileInputStream fstream = new FileInputStream(asciiFile);
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
String strLine;
// Read File Line By Line
int rowIndex = 0;
while ((strLine = br.readLine()) != null) {
CellGridData.add(row = new ArrayList<Cell>());
// System.out.println (strLine);
for (int colIndex = 0; colIndex < strLine.length(); colIndex++) {
row.add(new Cell(strLine.charAt(colIndex), this, rowIndex,colIndex));
// System.out.print(strLine.charAt(i));
}
rowIndex++;
// System.out.println();
}
// Close the input stream
br.close();
}
public String printGrid() {
String result = "";
Iterator<ArrayList<Cell>> itRow = CellGridData.iterator();
Iterator<Cell> itCol;
Cell cell;
while (itRow.hasNext()) {
itCol = itRow.next().iterator();
while (itCol.hasNext()) {
cell = itCol.next();
result += cell.Character;
}
result += "\n";
}
return result;
}
}
FoundBoxObject.java
package AsciiToDIVs;
import java.util.ArrayList;
public class FoundBoxObject extends FoundObject {
public ArrayList<FoundObject> containedObjects = new ArrayList<FoundObject>();
public static int boxCounter = 0;
public final int ID = boxCounter++;
public FoundBoxObject(int rowIndex, int colIndex, int width, int height, FoundBoxObject parent) {
super(rowIndex, colIndex, width, height);
if(parent!=null)
System.out.println("Created a box(" +
"ID="+ID+
",X="+rowIndex+
",Y="+colIndex+
",width="+width+
",height="+height+
",parent="+parent.ID+")");
else
System.out.println("Created a box(" +
"ID="+ID+
",X="+rowIndex+
",Y="+colIndex+
",width="+width+
",height="+height+
")");
}
}
FoundCharObject.java
package AsciiToDIVs;
public class FoundCharObject extends FoundObject {
private Character Char;
public FoundCharObject(int rowIndex, int colIndex,FoundBoxObject parent, char Char) {
super(rowIndex, colIndex, 1, 1);
if(parent!=null)
System.out.println("Created a char(" +
"Char="+Char+
",X="+rowIndex+
",Y="+colIndex+
",parent="+parent.ID+")");
else
System.out.println("Created a char(" +
",X="+rowIndex+
",Y="+colIndex+")");
this.Char = Char;
}
public Character getChar() {
return Char;
}
}
FoundObject.java
package AsciiToDIVs;
public class FoundObject {
private int rowIndex;
private int colIndex;
private int width = 0;
private int height = 0;
public FoundObject(int rowIndex, int colIndex, int width, int height )
{
this.rowIndex = rowIndex;
this.colIndex = colIndex;
this.width = width;
this.height = height;
}
public int getRowIndex() {
return rowIndex;
}
public int getColIndex() {
return colIndex;
}
public int getWidth() {
return width;
}
public int getHeight() {
return height;
}
}
Main Method
public static void main(String args[])
{
try {
CellGrid grid = new CellGrid("ascii.txt");
System.out.println(CellGrid.printDIV(grid.findBoxes(null)));
//System.out.println(grid.printGrid());
} catch (IOException e) {
e.printStackTrace();
}
}
Update
The 'printDIV' should be like this (more '' were being printed than needed).
public static String printDIV(ArrayList<FoundObject> objects)
{
String result = "";
Iterator<FoundObject> it = objects.iterator();
FoundObject fo;
while(it.hasNext())
{
fo = it.next();
if(fo instanceof FoundCharObject)
{
FoundCharObject fc = (FoundCharObject)fo;
result+=fc.getChar();
}
if(fo instanceof FoundBoxObject)
{
result+="<div>";
FoundBoxObject fb = (FoundBoxObject)fo;
result+=printDIV(fb.containedObjects);
result+="</div>";
}
}
return result;
}

Here's a fairly simple solution in JavaScript, tested via Node. Of course, you'll need to adjust the input and output methods.
var s = "\n\
--------------------------------\n\
I I\n\
I ------- ------- I\n\
I I I I I I\n\
I I A I I B I I\n\
I I I I I I\n\
I ------- ------- I\n\
I I\n\
I I\n\
--------------------------------\n\
";
var lines = s.split('\n');
var outer_box_top_re = /--+/g;
var i;
for (i=0; i<lines.length; i++) {
while ((res = outer_box_top_re.exec(lines[i])) != null) {
L = res.index
R = outer_box_top_re.lastIndex
process_box(i, L, R)
}
}
function process_box(T, L, R) {
console.log('<div top="' + T + '" left="' + L + '" right="' + R + '">')
blank_out(T, L, R)
var i = T;
while (1) {
i += 1;
if (i >= lines.length) {
console.log('Fell off bottom of ascii-art without finding bottom of box');
process.exit(1);
}
var line = lines[i];
if (line[L] == 'I' && line[R-1] == 'I') {
// interior
// Look for (the tops of) sub-boxes.
// (between L+1 and R-2)
var inner_box_top_re = /--+/g;
// Inner and outer need to be separate so that
// inner doesn't stomp on outer's lastIndex.
inner_box_top_re.lastIndex = L+1;
while ((res = inner_box_top_re.exec(lines[i])) != null) {
sub_L = res.index;
sub_R = inner_box_top_re.lastIndex;
if (sub_L > R-1) { break; }
process_box(i, sub_L, sub_R);
}
// Look for any other content (i.e., a box label)
content = lines[i].substring(L+1, R-1);
if (content.search(/[^ ]/) != -1) {
console.log(content);
}
blank_out(i, L, R);
}
else if (line.substring(L,R).match(/^-+$/)) {
// bottom
blank_out(i, L, R);
break;
}
else {
console.log("line " + i + " doesn't contain a valid continuation of the box");
process.exit(1)
}
}
console.log('</div>')
}
function blank_out(i, L, R) {
lines[i] = (
lines[i].substring(0,L)
+ lines[i].substring(L,R).replace(/./g, ' ')
+ lines[i].substring(R)
);
}

What you want is the idea of 2-dimensional parsing, which detects 2D entities and verifies they have legitimate relationships.
See http://mmi.tudelft.nl/pub/siska/TSD%202DVisLangGrammar.pdf‎
What will be difficult is defining the sets of possible "ASCII Art" constraints.
Do only want to to recognize letters? Made only of the same-letter characters?
"cursive" letters? boxes? (Your example has boxes whose sides aren't made of the same
ASCII character). Boxes with arbitrary thick walls? Nested boxes? Diagrams with (thin/fat) arrows? Kilroy-was-here-nose-over-the-wall?
Pictures of Mona Lisa in which character pixels provide density relations?
What exactly do you mean by "ASCII art"?
The real problem is defining the range of things you intend to recognize. If
you limit that range, your odds of success go way up (see the referenced paper).
The problem here has little to to do specifically with Java or Javascript. This is far more related
to algorithms. Pick a limited class of art, choose the right algorithms, and then what you have is a coding problem which should be relatively easy to solve. No limits, no algorithms --> no amount of Javascript will save you.

How to character and Numeric values restrict in TextField Java

I have two questions regarding character and numeric values limitation. I have listening to focus lost events and validating Name (character) and Contact (numeric) TextFields.
1. How do I restrict numeric data less then 3 digits and not allow more then 13 digits.
Below is the coding of my contact TextField for numeric:
private void txt_contactFocusLost(java.awt.event.FocusEvent evt) {
if (txt_contact.getText().equals("")) {
} else {
String contact = txt_contact.getText();
Pattern pt6 = Pattern
.compile("^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]+$");
Matcher mh6 = pt6.matcher(contact);
boolean matchFound6 = mh6.matches();
if (!(matchFound6)) {
JOptionPane.showMessageDialog(null,
"* Enter the Numaric Values only *");
txt_contact.setText("");
txt_contact.requestFocus();
}
}
}
2. How do I restrict character data less then 3 character and not allow more then 30 characters.
private void txt_nameFocusLost(java.awt.event.FocusEvent evt) {
if (txt_name.getText().equals("")) {
error2.setText("Enter Full Name");
txt_name.setText("");
} else {
String name = txt_name.getText();
Pattern pt1 = Pattern.compile("^[a-zA-Z]+([\\s][a-zA-Z]+)*$");
Matcher mh1 = pt1.matcher(name);
boolean matchFound1 = mh1.matches();
if (!(matchFound1)) {
JOptionPane.showMessageDialog(null,
"* Enter the Character Values only *");
txt_name.setText("");
txt_name.requestFocus();
} else {
error2.setText("");
}
}
}

You can do something easier:
NumberFormat numF = NumberFormat.getNumberInstance();
numF.setMaximumIntegerDigits(13);
numF.setMinimumIntegerDigits(3);
JFormattedTextField THE_FIELD = new JFormattedTextField(numF);
(The same idea for characters)
Now, only numbers are allowed, with the specified length range.
Read more about it: NumberFormat and JFormattedTextField

in the pattern you can use the statement {n,m} n- to m- times
Duo to this you can build your pattern like this
for your charackter comparison
Pattern pt6=Pattern.compile("[a-zA-Z]{3,30}"); // it says, it should be 3-30 non Digits
for the numbers it is
Pattern pt6=Pattern.compile("\\d{3,13}"); // it says, it should be 3-13 Digits

For String
public boolean validateString(String data){
char [] chars = data.toCharArray();
if(chars.length < 3 || chars.length >13)
return false;
return true;
}
For Number
public boolean validateNumber(int number){
String data = number+"";
return validateString(data);
}

I'm using this one. very simple and easy
use the method that you need or both then call where you need pass your JTextField as parameter done...
public static void setNumericOnly(JTextField jTextField){
jTextField.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
char c = e.getKeyChar();
if ((!Character.isDigit(c) ||
(c == KeyEvent.VK_BACK_SPACE) ||
(c == KeyEvent.VK_DELETE))) {
e.consume();
}
}
});
}
public static void setCharacterOnly(JTextField jTextField){
jTextField.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
char c = e.getKeyChar();
if ((Character.isDigit(c) ||
(c == KeyEvent.VK_BACK_SPACE) ||
(c == KeyEvent.VK_DELETE))) {
e.consume();
}
}
});
}