Program: 37904
Project: 37904
Buggy source:
public void init(ITimeSeriesModel timeSeries,String seriesTitle,int lowerRangeBoundary,int upperRangeBoundary,int gradientColorStart,int gradientColorEnd,int gradientEndCoordinateY,int lineAndPointColor){
  getLegendWidget().setVisible(false);
  getBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
  getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);
  getGraphWidget().setRangeLabelWidth(30.0f);
  getGraphWidget().setDomainLabelWidth(20.0f);
  getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getDomainGridLinePaint().setColor(Color.GRAY);
  getGraphWidget().getRangeGridLinePaint().setColor(Color.GRAY);
  getGraphWidget().getDomainGridLinePaint().setPathEffect(new DashPathEffect(new float[]{1,1},1));
  getGraphWidget().getRangeGridLinePaint().setPathEffect(new DashPathEffect(new float[]{1,1},1));
  getGraphWidget().getDomainOriginLinePaint().setColor(Color.GRAY);
  getGraphWidget().getRangeOriginLinePaint().setColor(Color.GRAY);
  setBorderStyle(Plot.BorderStyle.SQUARE,null,null);
  getBorderPaint().setStrokeWidth(1);
  getBorderPaint().setAntiAlias(true);
  getBorderPaint().setColor(Color.WHITE);
  Paint lineFill=new Paint();
  lineFill.setAlpha(80);
  lineFill.setShader(new LinearGradient(0,0,0,gradientEndCoordinateY,gradientColorStart,gradientColorEnd,Shader.TileMode.MIRROR));
  LineAndPointFormatter formatter=new LineAndPointFormatter(lineAndPointColor,lineAndPointColor,Color.WHITE,null);
  formatter.setFillPaint(lineFill);
  XYTimeSeries series=new XYTimeSeries(timeSeries,seriesTitle);
  addSeries(series,formatter);
  setRangeBoundaries(lowerRangeBoundary,upperRangeBoundary,BoundaryMode.FIXED);
  setDomainStep(XYStepMode.SUBDIVIDE,10);
  setRangeStep(XYStepMode.SUBDIVIDE,11);
  getGraphWidget().getDomainLabelPaint().setTextSize(20);
  getGraphWidget().getRangeLabelPaint().setTextSize(20);
  NumberFormat nf=NumberFormat.getNumberInstance();
  nf.setMaximumFractionDigits(2);
  setRangeValueFormat(nf);
  setDomainValueFormat(new Format(){
    private SimpleDateFormat formatDay=new SimpleDateFormat("String_Node_Str");
    private SimpleDateFormat formatHour=new SimpleDateFormat("String_Node_Str");
    public StringBuffer format(    Object obj,    StringBuffer toAppendTo,    FieldPosition pos){
      long timestamp=((Number)obj).longValue();
      Date date=new Date(timestamp);
      return formatHour.format(date,toAppendTo,pos);
    }
    public Object parseObject(    String source,    ParsePosition pos){
      return null;
    }
  }
);
}

Fixed version (ground truth):
public void init(ITimeSeriesModel timeSeries,String seriesTitle,int lowerRangeBoundary,int upperRangeBoundary,int gradientColorStart,int gradientColorEnd,int gradientEndCoordinateY,int lineAndPointColor){
  getLegendWidget().setVisible(false);
  getBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getDomainLabelPaint().setColor(Color.BLACK);
  getGraphWidget().getRangeLabelPaint().setColor(Color.BLACK);
  getGraphWidget().setRangeLabelWidth(45.0f);
  getGraphWidget().setDomainLabelWidth(20.0f);
  getGraphWidget().getGridBackgroundPaint().setColor(Color.WHITE);
  getGraphWidget().getDomainGridLinePaint().setColor(Color.GRAY);
  getGraphWidget().getRangeGridLinePaint().setColor(Color.GRAY);
  getGraphWidget().getDomainGridLinePaint().setPathEffect(new DashPathEffect(new float[]{1,1},1));
  getGraphWidget().getRangeGridLinePaint().setPathEffect(new DashPathEffect(new float[]{1,1},1));
  getGraphWidget().getDomainOriginLinePaint().setColor(Color.GRAY);
  getGraphWidget().getRangeOriginLinePaint().setColor(Color.GRAY);
  setBorderStyle(Plot.BorderStyle.SQUARE,null,null);
  getBorderPaint().setStrokeWidth(1);
  getBorderPaint().setAntiAlias(true);
  getBorderPaint().setColor(Color.WHITE);
  Paint lineFill=new Paint();
  lineFill.setAlpha(80);
  lineFill.setShader(new LinearGradient(0,0,0,gradientEndCoordinateY,gradientColorStart,gradientColorEnd,Shader.TileMode.MIRROR));
  LineAndPointFormatter formatter=new LineAndPointFormatter(lineAndPointColor,lineAndPointColor,Color.WHITE,null);
  formatter.setFillPaint(lineFill);
  XYTimeSeries series=new XYTimeSeries(timeSeries,seriesTitle);
  addSeries(series,formatter);
  setRangeBoundaries(lowerRangeBoundary,upperRangeBoundary,BoundaryMode.FIXED);
  setDomainStep(XYStepMode.SUBDIVIDE,10);
  setRangeStep(XYStepMode.SUBDIVIDE,11);
  getGraphWidget().getDomainLabelPaint().setTextSize(20);
  getGraphWidget().getRangeLabelPaint().setTextSize(20);
  NumberFormat nf=NumberFormat.getNumberInstance();
  nf.setMaximumFractionDigits(1);
  setRangeValueFormat(nf);
  setDomainValueFormat(new Format(){
    private SimpleDateFormat formatDay=new SimpleDateFormat("String_Node_Str");
    private SimpleDateFormat formatHour=new SimpleDateFormat("String_Node_Str");
    public StringBuffer format(    Object obj,    StringBuffer toAppendTo,    FieldPosition pos){
      long timestamp=((Number)obj).longValue();
      Date date=new Date(timestamp);
      return formatHour.format(date,toAppendTo,pos);
    }
    public Object parseObject(    String source,    ParsePosition pos){
      return null;
    }
  }
);
}