Databases
StackOverflow2013
Postsdbo
POTranspose arrayLists with .split(",")
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POTranspose arrayLists with .split(",")
    primarykey
    data
    text
    <p>I have a program reading in arrayLists and transposing it. The input file is<BR> <code>C0 F0 D0 E0 G0 B0</code><BR> <code>C1 F1 D1 E1 G1 B1</code><BR> <code>C2 F2 D2 E2 G2 B2</code><BR> <code>C3 F3 D3 E3 G3 B3</code><BR> <code>C4 F4 D4 E4 G4 B4</code><BR> <code>C5 F5 D5 E5 G5 B5</code><BR> I want to know how to change the program so that the input is<BR> <code>C0,F0,D0,E0,G0,B0</code><BR> <code>C1,F1,D1,E1,G1,B1</code><BR> <code>C2,F2,D2,E2,G2,B2</code><BR> <code>C3,F3,D3,E3,G3,B3</code><BR> <code>C4,F4,D4,E4,G4,B4</code><BR> <code>C5,F5,D5,E5,G5,B5</code><BR> So somewhere the .split(",") has to be used. I'd also like to know how to make the program read in a general number of columns. So how 2-dimensional arrayLists have to be used? Here is the code:<BR></p> <pre><code>import java.util.*; import java.lang.*; import java.io.*; public class list { public static void main(String[] args) { FileOutputStream out; PrintStream p; try { File file = new File(args[0]); String fileName= file.getName(); int len = fileName.length(); StringBuffer sb = new StringBuffer(fileName); sb.replace(len-4,len,".hr"); out = new FileOutputStream(sb.toString()); p = new PrintStream( out ); try { List&lt;String&gt; column1 = new ArrayList&lt;String&gt;(); List&lt;String&gt; column2 = new ArrayList&lt;String&gt;(); List&lt;String&gt; column3 = new ArrayList&lt;String&gt;(); List&lt;String&gt; column4 = new ArrayList&lt;String&gt;(); List&lt;String&gt; column5 = new ArrayList&lt;String&gt;(); List&lt;String&gt; column6 = new ArrayList&lt;String&gt;(); Scanner myfile = new Scanner(new DataInputStream(new FileInputStream(args[0]))); while (myfile.hasNext()) { column1.add(myfile.next()); column2.add(myfile.next()); column3.add(myfile.next()); column4.add(myfile.next()); column5.add(myfile.next()); column6.add(myfile.next()); } myfile.close(); p.println(column1); p.println(column2); p.println(column3); p.println(column4); p.println(column5); p.println(column6); } catch (Exception e) { e.printStackTrace(); } } catch (Exception e) { System.err.println ("Error writing to file"); } } // End of MAIN } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USHele
    1. USuser1189952
    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
    1. VO
      singulars
      1. POTranspose arrayLists with .split(",")
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COOh my! Please format the text of your question a bit. You can mark up code blocks to make it look like code, see other questions for examples.
      singulars
      1. POTranspose arrayLists with .split(",")
      1. USThe Nail
    2. COYou should learn how to post formatted, properly indented code.
      singulars
      1. POTranspose arrayLists with .split(",")
      1. USHot Licks
    3. COPlease put your code inside a "code snippet" (the {} icon above the editor) and format it, so it becomes readable.
      singulars
      1. POTranspose arrayLists with .split(",")
      1. USPer
 

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