Examples of javax.sound.midi.Track.ticks()

javax.sound.midi.Track.ticks()
Obtains the length of the track, expressed in MIDI ticks. (The duration of a tick in seconds is determined by the timing resolution of the Sequence containing this track, and also by the tempo of the music as set by the sequencer.) @return the duration, in ticks @see Sequence#Sequence(float,int) @see Sequencer#setTempoInBPM(float) @see Sequencer#getTickPosition()

        /*
         * create an empty Track
         */
        Sequence seq = new Sequence(Sequence.SMPTE_24, 67, 9);
        Track tr = seq.createTrack();
        assertEquals(0, tr.ticks());
        MidiEvent event1 = new MidiEvent(new MidiMessage1(new byte[] {1, 2, 3}), -10L);
        MidiEvent event2 = new MidiEvent(new MidiMessage1(new byte[] {23, -16, 4}), 2L);
        MidiEvent event3 = new MidiEvent(new MidiMessage1(new byte[] {3, -67, -1}), 6L);
        /*
         * values of Track.ticks() only positive;

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         * contain in the Track; 
         * if I remove event with the biggest value of 
         * tick, value that return method Track.ticks() will be the same
         */
        tr.add(event1);
        assertEquals(0, tr.ticks());
        tr.add(event2);
        assertEquals(2, tr.ticks());
        tr.add(event3);
        assertEquals(6, tr.ticks());
        tr.remove(event3); //I remove event with the biggest tick,...

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         * tick, value that return method Track.ticks() will be the same
         */
        tr.add(event1);
        assertEquals(0, tr.ticks());
        tr.add(event2);
        assertEquals(2, tr.ticks());
        tr.add(event3);
        assertEquals(6, tr.ticks());
        tr.remove(event3); //I remove event with the biggest tick,...
        assertEquals(6, tr.ticks()); //...but value that return method Track.ticks() the same
        tr.remove(event2);

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        tr.add(event1);
        assertEquals(0, tr.ticks());
        tr.add(event2);
        assertEquals(2, tr.ticks());
        tr.add(event3);
        assertEquals(6, tr.ticks());
        tr.remove(event3); //I remove event with the biggest tick,...
        assertEquals(6, tr.ticks()); //...but value that return method Track.ticks() the same
        tr.remove(event2);
        tr.remove(event1);
        assertEquals(6, tr.ticks()); //and even now...

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        tr.add(event2);
        assertEquals(2, tr.ticks());
        tr.add(event3);
        assertEquals(6, tr.ticks());
        tr.remove(event3); //I remove event with the biggest tick,...
        assertEquals(6, tr.ticks()); //...but value that return method Track.ticks() the same
        tr.remove(event2);
        tr.remove(event1);
        assertEquals(6, tr.ticks()); //and even now...
        tr.add(event2);
        assertEquals(6, tr.ticks()); //and now...

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        assertEquals(6, tr.ticks());
        tr.remove(event3); //I remove event with the biggest tick,...
        assertEquals(6, tr.ticks()); //...but value that return method Track.ticks() the same
        tr.remove(event2);
        tr.remove(event1);
        assertEquals(6, tr.ticks()); //and even now...
        tr.add(event2);
        assertEquals(6, tr.ticks()); //and now...
        tr.remove(tr.get(1));
        tr.remove(event2);
        assertEquals(0, tr.size()); //Track is empty

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        assertEquals(6, tr.ticks()); //...but value that return method Track.ticks() the same
        tr.remove(event2);
        tr.remove(event1);
        assertEquals(6, tr.ticks()); //and even now...
        tr.add(event2);
        assertEquals(6, tr.ticks()); //and now...
        tr.remove(tr.get(1));
        tr.remove(event2);
        assertEquals(0, tr.size()); //Track is empty
        assertEquals(0, tr.ticks()); //Track is empty, value that return Track.ticks() equals 0
    }

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        tr.add(event2);
        assertEquals(6, tr.ticks()); //and now...
        tr.remove(tr.get(1));
        tr.remove(event2);
        assertEquals(0, tr.size()); //Track is empty
        assertEquals(0, tr.ticks()); //Track is empty, value that return Track.ticks() equals 0
    }
    
    /**
     * subsidiary class to use abstract class MidiMessage
     *

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         * create an empty Track
         */
        Sequence seq = new Sequence(Sequence.SMPTE_24, 67, 9);
        Track tr = seq.createTrack();
        assertEquals(1, tr.size());
        assertEquals(0, tr.ticks());
        
        byte[] bt = new byte[] {1, 2, 3};
        MidiMessage1 message = new MidiMessage1(bt);
        MidiEvent event = new MidiEvent(message, 10L);

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