Is an extra character in my code?

Question

I use 3 classes: the character class, the Scanner class, and the Test class.

This is a character class:

public class Character {
    private char cargo = '\u0007'; 
    private String sourceText = ""; 
    private int sourceIndex = 0; 
    private int lineIndex = 0;
    private int columnIndex = 0;
    public Character(String sourceText, char cargo, int sourceIndex, int lineIndex, int columnIndex) {
        this.sourceText = sourceText;
        this.cargo = cargo;
        this.sourceIndex = sourceIndex;
        this.lineIndex = lineIndex;
        this.columnIndex = columnIndex;
    }
    /*****************************************************************************************/
    /* Returns the String representation of the Character object                      */
    /*****************************************************************************************/
    @Override
    public String toString() {
        switch (cargo) {
            case ' ': return String.format("%6d %-6d " + "    blank", lineIndex, columnIndex);
            case '\t': return String.format("%6d %-6d " + "    tab", lineIndex, columnIndex);
            case '\n': return String.format("%6d %-6d " + "    newline", lineIndex, columnIndex);
            default: return String.format("%6d %-6d " + cargo, lineIndex, columnIndex);
        }
    }
}

Here is my scanner class:

public class Scanner {
    private String sourceText = ""; 
    private int sourceIndex = -1; 
    private int lineIndex = 0;
    private int columnIndex = -1;
    private int lastIndex = 0;
    /*****************************************************************************************/
    /* Assign proper values                                                                  */
    /*****************************************************************************************/ 
    public Scanner(String sourceText) {
        this.sourceText = sourceText;
        lastIndex = sourceText.length() - 1;
    }
    /*****************************************************************************************/
    /* Returns the next character in the source text                                         */
    /*****************************************************************************************/   
    public Character getNextCharacter() {
        if (sourceIndex > 0 && sourceText.charAt(sourceIndex - 1) == '\n') {
            ++lineIndex;
            columnIndex = -1;
        }
        ++sourceIndex;
        ++columnIndex;
        char currentChar = sourceText.charAt(sourceIndex);
        Character objCharacter = new Character(sourceText, currentChar, sourceIndex, lineIndex, columnIndex);
        return objCharacter;
    }
}

And this is the main method of the Test class:

public static void main(String[] args) {
    String sourceText = "";
    String filePath = "D:\\Somepath\\SampleCode.dat";
    try { sourceText = readFile(filePath, StandardCharsets.UTF_8); }
    catch (IOException io) { System.out.println(io.toString()); }
    LexicalAnalyzer.Scanner sca = new LexicalAnalyzer.Scanner(sourceText);
    LexicalAnalyzer.Character cha;
    int i =0;
    while(i < sourceText.length()) {
        cha = sca.getNextCharacter();
        System.out.println(cha.toString());
        i++;
    }
}

Basically, I try to print every character (including spaces, tabs and newlines) in my source file, as well as other character data such as line number and column number. Also pay attention to my switch and case statement in the method toString()of the Character class.

Say, for example, my file contains text:

This is line #1. 
This is line #2.

From my code, I expect to get:

 0 0      T
 0 1      h
 0 2      i
 0 3      s
 0 4          blank
 0 5      i
 0 6      s
 0 7          blank
 0 8      l
 0 9      i
 0 10     n
 0 11     e
 0 12         blank
 0 13     #
 0 14     1
 0 15     .
 0 16         newline
 1 0      T
 1 1      h
 1 1      i
 1 2      s
 1 3          blank
 1 4      i
 1 5      s
 1 6          blank
 1 7      l
 1 8      i
 1 9      n
 1 10     e
 1 11         blank
 1 12     #
 1 13     2
 1 14     .

However, I get:

 0 0      T
 0 1      h
 0 2      i
 0 3      s
 0 4          blank
 0 5      i
 0 6      s
 0 7          blank
 0 8      l
 0 9      i
 0 10     n
 0 11     e
 0 12         blank
 0 13     #
 0 14     1
 0 15     .
 0 16     
 0 17         newline
 0 18     T
 1 0      h
 1 1      i
 1 2      s
 1 3          blank
 1 4      i
 1 5      s
 1 6          blank
 1 7      l
 1 8      i
 1 9      n
 1 10     e
 1 11         blank
 1 12     #
 1 13     2
 1 14     .

, , . . , , . , Java: http://parsingintro.sourceforge.net/#contents_item_4.2.

, . .

---

%n String.format System.getProperty("line.separator"); . : , ?

Answer 1

Windows.

\r\n, \n.

, . :

case '\r': return String.format("%6d %-6d " + "    winNewline", lineIndex, columnIndex);

:

 0 0      T
 0 1      h
 0 2      i
 0 3      s
 0 4          blank
 0 5      i
 0 6      s
 0 7          blank
 0 8      l
 0 9      i
 0 10     n
 0 11     e
 0 12         blank
 0 13     #
 0 14     1
 0 15     .
 0 16         blank
 0 17         winNewline
 0 18         newline
 0 19     T
 1 0      h
 1 1      i
 1 2      s
 1 3          blank
 1 4      i
 1 5      s
 1 6          blank
 1 7      l
 1 8      i
 1 9      n
 1 10     e
 1 11         blank
 1 12     #
 1 13     2
 1 14     .

Process finished with exit code 0

Answer 2

, , , case ascii char

default: return String.format("%6d %-6d " + Integer.valueOf(cargo), lineIndex, columnIndex);

, ascii char . , char : http://www.asciitable.com/

, char, , - '\ r' ( '\n' char).

, !