Android Eclipse Java comparing array contents with string. Not working?

Question

Hi I have an array that stores when radio buttons are checked so that when I load the radio settings again I can set the apporpriate one as checked.

My array is like this :

   |0          |1         |2
----------------------------------
0  |Option1    |data      |false
----------------------------------
1  |Option2    |data      |true
----------------------------------
2  |Option3    |data      |false
----------------------------------
3  |Option4    |data      |false

etc....

Now the index I am interested in is the true/false one as that tells me if that radio button should be checked.

I read these values from a database into the array. That's all working fine and the data is in the array correctly.

For some reason when I do a comparison it does not match it up with what I can see is correct.

This is what I am doing in a loop...

String checked = myarray[i][2];

// This correctly outputs 'false', 'true', 'false' and 'false' as per the array above.            
Toast.makeText(DatabaseTestActivity.this, checked, Toast.LENGTH_LONG).show();

// Now when it gets here it fails to trigger the match for 'true'.
if (checked == "true") {
     active = i;
     Toast.makeText(DatabaseTestActivity.this, "Found Check", Toast.LENGTH_LONG).show();
}

Any idea on what I am doing wrong ? It's just a simple string compare, or so I thought ??

KV Prajapati · Accepted Answer · 2011-10-22 12:45:44Z

2

Use String.equals() to compare strings.

if (checked.equals("true")) {

}

answered Oct 22, 2011 at 12:45

KV Prajapati

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1 Comment

Rog Over a year ago

Thanks ! That was it - I am too used to PHP for my own good, thank you very much :)

MByD · Accepted Answer · 2011-10-22 12:46:17Z

1

You should compare using String#equals or String#equalsIgnoreCase:

checked.equals( "true" )

== compares references, while equals compares the content of the string.

answered Oct 22, 2011 at 12:46

MByD

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