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  Compare an object in an array with all objects in another array?  (Read 365 times)
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Offline Gamerulf

Junior Duke


Medals: 2



« Posted 2013-03-22 13:51:12 »

I have 2 arrays. The first one stores 100 JButtons and the second one stores 4 of those JButtons.
And I want an if-statement that compares one object in Array1 with the 4 objects in Array2.

This is along the lines of how I want it to look..
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// r = random number.
if(array1[r] == array2[] )
{
//Do stuff
}


Any method or something I could use to look through every index of array2?

- Gamerulf
Offline BenniBanni
« Reply #1 - Posted 2013-03-22 14:03:35 »

Maybe you want to compare objects using Object1.equals(Object2) for good results.

something like

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// assuming:
// JButton buttonToSearchFor is the random button
// and the 4 Buttons are in: JButton[] theButtonArray
for(JButton testButton : theButtonArray) {
   if(buttonToSearchFor.equals(testButton)) {
      // Jump and dance
   }
}
Offline StrideColossus
« Reply #2 - Posted 2013-03-22 14:18:09 »

Not sure exactly what your requirement is - are you saying you want to check that the 4 buttons in array2 are members of array1?

If so something along these lines:

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final List<Jbutton> list = Arrays.asList( array1 );
for( JButton b : array2 ) {
    if( list.indexOf( b ) == -1 ) return false;
}
return true;


If your array1 is already sorted you could use:

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Arrays.binarySearch( array1, b );

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Offline Gamerulf

Junior Duke


Medals: 2



« Reply #3 - Posted 2013-03-22 15:40:49 »

Wasn't quite as simple as I thought.
But everything works "fine" now.

Thanks for the help!


- Gamerulf
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