Databases
StackOverflow2013
Postsdbo
POerror in java program
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POerror in java program
    primarykey
    data
    text
    <p>I am working with file reader and writer using text files. Basically implementing a dfa of pascal grammer that will handle comments in a program. For this I have used 3 text files 1 file to read data from, 1 to write token in it and 1 to write error token in it. The pascal compiler does not consider this {{ as a comment because the comment syntax is "{this is a comment}" . I used an array of [5][4] for this purpose and I used file reader to read from a text file name "code.txt" containing this text "{a}". But the problem is that when i write this into a new text file name "token.txt" (initially writing it in token.txt but it should be in error.tx), it prints this {{a} means that it prints the first character two times like {{ . I want to output same as I have written it in the code.txt file. Thanks in advance.</p> <pre><code>public class Lex { public static char dfa1[][] = new char[5][4]; /* * for(int i=0; i&lt;5; i++) { for(int j=0; j&lt;4; j++) { * System.out.println("arr["+i+"]["+j+"]"+dfa1[i][j]); } } */ //FileReader fr = new FileReader(filename); //BufferedReader br = new BufferedReader(fr); File file = new File("code.txt"); BufferedReader reader = null; int StartState = 1; char CurrentState = '1'; int acp =0; String temptok = new String(); try { reader = new BufferedReader(new FileReader(file)); int i; // repeat until EOF while ((i = reader.read()) != -1) { char c = (char) i; if (c == '{') { if (CurrentState == dfa1[1][0]) { CurrentState = '2'; acp =0; temptok = temptok.concat(String.valueOf(c)); } else if (CurrentState == dfa1[2][0]) { temptok = temptok.concat(String.valueOf(c)); acp =0; CurrentState = '4'; } else if (CurrentState == dfa1[3][0]) { temptok = temptok.concat(String.valueOf(c)); CurrentState = '4'; acp =0; } else if (CurrentState == dfa1[4][0]) { temptok = temptok.concat(String.valueOf(c)); acp =0; break; } } if (c == '}') { if (CurrentState == dfa1[1][0]) { acp =0; temptok = temptok.concat(String.valueOf(c)); break; } else if (CurrentState == dfa1[2][0]) { temptok = temptok.concat(String.valueOf(c)); CurrentState = '3'; acp = 1; } else if (CurrentState == dfa1[3][0]) { temptok = temptok.concat(String.valueOf(c)); CurrentState = '3'; acp = 1; } else if (CurrentState == dfa1[4][0]) { temptok = temptok.concat(String.valueOf(c)); acp = 0; break; } } if (c != '}') { if (CurrentState == dfa1[1][0]) { temptok = temptok.concat(String.valueOf(c)); acp =0; break; } else if (CurrentState == dfa1[2][0]) { temptok = temptok.concat(String.valueOf(c)); CurrentState = '2'; acp =0; } else if (CurrentState == dfa1[3][0]) { temptok = temptok.concat(String.valueOf(c)); acp =0; break; } else if (CurrentState == dfa1[4][0]) { temptok = temptok.concat(String.valueOf(c)); acp =0; break; } } //System.out.println(temptok); PrintWriter writer = new PrintWriter("token.txt", "UTF-8"); PrintWriter ewriter = new PrintWriter("error.txt", "UTF-8"); if(acp == 1){ writer.println(temptok); writer.close(); } else if(acp == 0) { ewriter.println(temptok); ewriter.close(); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USandroid_guy
    1. USandroid_guy
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POerror in java program
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POerror in java program
      1. This table or related slice is empty.
      1. VTModeratorReview
    3. VO
      singulars
      1. POerror in java program
      1. This table or related slice is empty.
      1. VTClose
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload