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POCreate a two dimensional array like a matrix
 

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  1. POCreate a two dimensional array like a matrix
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    <p>I am not so familiar with java and i have a project with very short deadlines. Let's get to the point. I have the following class:</p> <pre class="lang-java prettyprint-override"><code>public static void getAllDataDB1() // Catching all the data from "bank1" database { try { MetaData1 = connection1.getMetaData(); catalogs1 = MetaData1.getCatalogs(); String[] types = {"TABLE"}; resTables1 = MetaData1.getTables(null,null,"%",types); while (resTables1.next()) { db1TableName = resTables1.getString("TABLE_NAME"); System.out.println("|=====================================================|"); System.out.println("| CATCHING " +dbName1+"."+db1TableName+ " DATA |"); System.out.println("|=====================================================|"); System.out.println("|=====================================================|"); System.out.println("| THE QUERY IS IN PROGRESS. PLEASE WAIT... |"); System.out.println("|=====================================================|"); resTablesStr1 = statement1.executeQuery("SELECT * FROM "+db1TableName+";"); resColumns1 = resTablesStr1.getMetaData(); db1ColNum = resColumns1.getColumnCount(); db1FirstColName = resColumns1.getColumnName(1); for (int i=1; i&lt;=db1ColNum; i++) { db1FirstColName = resColumns1.getColumnName(1); db1ColName = resColumns1.getColumnName(i); System.out.println("| COLUMN: " +db1ColName+ " |"); System.out.println("\n"); resTablesData1 = statement1.executeQuery("SELECT "+db1ColName+" FROM "+db1TableName+" GROUP BY "+db1FirstColName+";"); while (resTablesData1.next()) { db1RowNum++; } columnsArrayDB1 = new String[db1RowNum][db1ColNum]; resTablesData1 = statement1.executeQuery("SELECT "+db1ColName+" FROM "+db1TableName+" GROUP BY "+db1FirstColName+";"); resTablesData1.next(); String rowData = resTablesData1.getString(db1ColName); for (int j=0; j&lt;db1RowNum; j++) { System.out.println(); for (int k=0; k&lt;db1ColNum; k++) { columnsArrayDB1[j][k] = rowData; System.out.println("|-----------------------------------------------------|"); System.out.print("| "+columnsArrayDB1[j][k]+" |"+"\t"); System.out.println("|-----------------------------------------------------|"); //columnsArrayDB1[j][x+1]=columnsArrayDB1[j][x]; } } /*while (resTablesData1.next()) { String rowData = resTablesData1.getString(db1ColName); for (int j=0; j&lt;db1RowNum; j++) { System.out.println(rowData); //columnsArrayDB1[j] = rowData; //System.out.print(columnsArrayDB1[j]+" "); } System.out.println(rowData); }*/ } } } catch (SQLException e) { System.err.println("Connection Failed! Check output console " + e.getMessage()); System.exit(0); } } </code></pre> <p>I am trying to catch ALL data from a specific database and store them to an array as matrix style. The result i receive when compile and run the above code is something like that:</p> <pre><code>1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 | COLUMN: Gender | female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female female </code></pre> <p>As you realize i want a result like this:</p> <pre><code>1 female Mrs. 2 male Mr. etc... etc... </code></pre> <p>Please advise what should i do because i am stuck here looking the pc... George.</p>
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      1. POCreate a two dimensional array like a matrix
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    1. COYou have this in your loop: `columnsArrayDB1[j][k] = rowData;` but you never change `rowData`. If you want the data to be different, you'll have to do something that sets `rowData` to something new, inside your loop. However, I'm not familiar with using SQL in Java, so I can't help you with that part right away.
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    2. COOK, what if you move the `resTablesData1.next` and `resTablesData1.getString` inside the loop?
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    3. COalso check [this](http://docs.oracle.com/javase/tutorial/jdbc/basics/retrieving.html)
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      1. USFoo Bar User
 

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