The answers with decimals now always show two decimals

questionGenerator/src/main/java/questionGenerator/generator/answersAreNotEntites/SizeGenerator.java

@@ -12,6 +12,7 @@
 import main.java.questionGenerator.question.answers.formatAnswers.AddUnitsFormater;
 import main.java.questionGenerator.question.answers.formatAnswers.EmbellishNumbersFormater;
 import main.java.questionGenerator.question.answers.formatAnswers.RemoveEFromNumber;
+import main.java.questionGenerator.question.answers.formatAnswers.SetAmountOfDecimals;
 
 public class SizeGenerator extends AnswersAreNotEntites {
 
@@ -45,7 +46,7 @@ private String getRightAnswerEntity(String url) {
 	@Override
 	public List<String> decorateAnswers(List<String> answers) {
 		AnswerFormater formater = new RemoveEFromNumber(new EmbellishNumbersFormater(
-			new AddUnitsFormater(null, "km^2")));
+				new SetAmountOfDecimals(new AddUnitsFormater(null, "km^2"), 2)));
 		return formater.format(answers);
 	}
 

questionGenerator/src/main/java/questionGenerator/question/answers/formatAnswers/SetAmountOfDecimals.java

@@ -0,0 +1,62 @@
+package main.java.questionGenerator.question.answers.formatAnswers;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import main.java.questionGenerator.question.answers.AbstractFormater;
+import main.java.questionGenerator.question.answers.AnswerFormater;
+
+public class SetAmountOfDecimals extends AbstractFormater {
+
+	private int amount;
+
+	public SetAmountOfDecimals(AnswerFormater formater, int amount) {
+		super(formater);
+		this.amount = amount;
+	}
+
+	@Override
+	public List<String> format(List<String> answers) {
+		List<String> result = new ArrayList<>();
+		for(String answer : answers) {
+			String[] splitted = split(answer);
+			if(splitted.length==0)
+				result.add(answer);
+			else {
+				String decimalPart = formatDecimalPart(splitted[1]);
+				result.add(splitted[0] + '.' + decimalPart);
+			}
+		}
+		return end(result);
+	}
+
+	private String[] split(String answer) {
+		String[] result = {"", ""};
+		int position = 0;
+		for(char c : answer.toCharArray()) {
+			if(c=='.')
+				position = 1;
+			else
+				result[position] += c;
+		}
+		return result;
+	}
+
+	private String formatDecimalPart(String decimalPart) {
+		if(decimalPart.length()<amount) {
+			int diference = amount - decimalPart.length();
+			for(int i=0; i<diference; i++) {
+				decimalPart += "0";
+			}
+		}
+		else if(decimalPart.length()>amount) {
+			char[] aux = decimalPart.toCharArray();
+			decimalPart = "";
+			for(int i=0; i<amount; i++) {
+				decimalPart += aux[i];
+			}
+		}
+		return decimalPart;
+	}
+
+}