Package org.jfree.data.general

Examples of org.jfree.data.general.DefaultPieDataset.clear()

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     */
    public void testClear() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.addChangeListener(this);
        // no event is generated if the dataset is already empty
        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
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        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
        assertNotNull(this.lastEvent);
        assertEquals(0, d.getItemCount());
    }

    /**
 
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     */
    public void testClear() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.addChangeListener(this);
        // no event is generated if the dataset is already empty
        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
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        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
        assertNotNull(this.lastEvent);
        assertEquals(0, d.getItemCount());
    }

    /**
 
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     */
    public void testClear() {
        DefaultPieDataset d = new DefaultPieDataset();
        d.addChangeListener(this);
        // no event is generated if the dataset is already empty
        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
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        d.clear();
        assertNull(this.lastEvent);
        d.setValue("A", 1.0);
        assertEquals(1, d.getItemCount());
        this.lastEvent = null;
        d.clear();
        assertNotNull(this.lastEvent);
        assertEquals(0, d.getItemCount());
    }
   
    /**
 
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