Databases
StackOverflow2013
Postsdbo
POcopying elements of an array-list to the other array-list
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POcopying elements of an array-list to the other array-list
    primarykey
    data
    text
    <p>I have written such a simple code:</p> <ul> <li><p>I have written this line in my class's constructor : <code>List element = new ArrayList();</code></p></li> <li><p>I have a variable named <code>cost</code> which its type is <code>int</code> </p></li> <li><p>one method will return three lists with different objects: <code>listOne, listTwo, listThree</code></p></li> <li><p>in another method I have written below code which this method will use those lists that are created in the method above.this method will be called three times for three lists above. each call for each list.</p> <pre><code>// begining of the method: int cost = 0; if(cost==0){ element = listOne; cost = 3; } if(cost&lt;4){ element = listtwo; cost = 6; } // end System.out.println(element.toString()); </code></pre></li> </ul> <p>Unfortunately, instead of printing <code>listTwo</code> it will print <code>listThree</code> (if we have 4 or more lists it will print the last one)!</p> <p>Is there any problem with if-else condition?</p> <p>thanks</p> <p>EDIT: this is my main code but its condition is like the code above: <code>auxiliaryList</code> in the code below is <code>listOne</code> or <code>list Two</code> or <code>listThree</code> respectively.</p> <pre><code>cost = 0; public void method { System.out.println(element.toString());//number one if (cost== 0) { element = auxiliaryList; cost = 3; } else if( cost&lt;4){ element =auxiliaryList; cost = 6; } } return; } } </code></pre> <p>also the line which is declared with <code>//number one</code> shows me that before going to the if/else condition ,the element list will be set to the current list in the method.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser472221
    1. USuser472221
    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. POcopying elements of an array-list to the other array-list
      1. USDeepak
      1. VTFavorite
    1. COI don't see a if-else condition, only two if
      singulars
      1. POcopying elements of an array-list to the other array-list
      1. USoliholz
    2. COseems like its printing last list only. can you debug the value of cost. One more check could be the lists might be getting empty because of initializing the constructor. else move the initialization List element = new ArrayList(); outside of constructor
      singulars
      1. POcopying elements of an array-list to the other array-list
      1. USRustum
    3. COthe value of cost is Ok!! but as I said for Jon Skeet:I have checked that before going in to the if-else condition ,the element list will be set with the current list.I mean for the third list,before going in to the if-else condition,the element list will be set to thirdList!!!
      singulars
      1. POcopying elements of an array-list to the other array-list
      1. USuser472221
 

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