java – ArrayList . Contain gives strange output
•
Java
Who can explain? I have an ArrayList with a string I'm using it! arraylist. Contain to make sure I don't add duplicates In the following code, I show everything in ArrayList, and then use! arraylist. Contain checks whether the same value exists in ArrayList
public ArrayList<String> getIsiXhosaRecordings(ArrayList<String> must_download,ArrayList<String> all_filenames)
{
database = getReadableDatabase();
for(int x = 0; x < all_filenames.size(); x++)
{
System.out.println("All files: >>>"+all_filenames.get(x)+"<<<");
}
String[] table_names = {"Voice_exercise","Lesson_exercise"};
for(int x = 0; x < table_names.length; x++)
{
String sql = "SELECT * FROM "+table_names[x];
Cursor cursor = database.rawQuery(sql,null);
while(cursor.moveToNext())
{
String audio_isixhosa = cursor.getString(cursor.getColumnIndex("audio_isixhosa"));
if(!all_filenames.contains(audio_isixhosa));
{
System.out.println("Audio file: >>>"+audio_isixhosa+"<<<");
}
}
}
return must_download;
}
And logcat:
09-04 15:30:40.188: D/dalvikvm(14202): GC_CONCURRENT freed 65K,9% free 9852K/10759K,paused 2ms+2ms,total 24ms 09-04 15:30:40.188: W/sqliteConnectionPool(14202): A sqliteConnection object for database '/data/data/com.example.molo/databases/molo.db' was leaked! Please fix your application to end transactions in progress properly and to close the database when it is no longer needed. 09-04 15:30:40.298: I/System.out(14202): All files: >>>clock.jpg<<< 09-04 15:30:40.298: I/System.out(14202): All files: >>>confident.jpg<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>correct.png<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>correct.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>crowd.jpg<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e001.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e003.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e004.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e005.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e007.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e008.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e009.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e010.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e011.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e012.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e013.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e014.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e015.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e016.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e017.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e018.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e019.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e020.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e021.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e022.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>e023.wav<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>goodbye.jpg<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>greeting.jpg<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>how.jpg<<< 09-04 15:30:40.308: I/System.out(14202): All files: >>>howareyou.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>images<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>incorrect.png<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>incorrect.wav<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>kioskmode<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>lock.png<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>map.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>molo.db<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>morning.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>pe.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>question.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>question2.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>sounds<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>stranger.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>thembi.jpg<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>unlock.png<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>webkit<<< 09-04 15:30:40.318: I/System.out(14202): All files: >>>what.jpg<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>who.jpg<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>why.jpg<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>world.jpg<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x001.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x002.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x003.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x004.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x005.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x006.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x007.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x008.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x009.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x010.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x011.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x012.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x013.wav<<< 09-04 15:30:40.328: I/System.out(14202): All files: >>>x014.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x015.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x016.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x017.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x018.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x019.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x020.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x021.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x022.wav<<< 09-04 15:30:40.338: I/System.out(14202): All files: >>>x023.wav<<< 09-04 15:30:40.338: I/System.out(14202): Audio file: >>>x001.wav<<< 09-04 15:30:40.338: I/System.out(14202): Audio file: >>>x004.wav<<< 09-04 15:30:40.338: I/System.out(14202): Audio file: >>>x008.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x005.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x010.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x019.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x020.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x021.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x001.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x002.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x003.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x004.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x005.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x006.wav<<< 09-04 15:30:40.348: I/System.out(14202): Audio file: >>>x007.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x008.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x009.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x010.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x012.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x013.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x014.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x015.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x016.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x017.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x018.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x022.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>x023.wav<<< 09-04 15:30:40.358: I/System.out(14202): Audio file: >>>baboon.wav<<< 09-04 15:35:40.068: W/IInputConnectionWrapper(14202): getSelectedText on inactive InputConnection 09-04 15:35:40.068: W/IInputConnectionWrapper(14202): setComposingText on inactive InputConnection 09-04 15:35:40.068: W/IInputConnectionWrapper(14202): getExtractedText on inactive InputConnection
I added "> > >" and "< < < make sure I don't miss spaces, and I'll use ArrayList must_download later. Why do all_filenames.contains and! All_filenames.constants list the same values? I've tried to make each. Tostring() but got the same results. I also used similar methods for similar file names, and they work well. Thank you
Solution
Semicolon termination statement after if
if(!all_filenames.contains(audio_isixhosa));
{ // <-- new block separate from if.
So the body is an empty block Delete semicolon
if(!all_filenames.contains(audio_isixhosa)) {
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