/* * Example_27.java * * Copyright (c) 2026 PDFjet Software * Licensed under the MIT License. See LICENSE file in the project root. */ package examples; import java.io.*; import com.pdfjet.*; import com.pdfjet.fonts.*; /** * Example_27.java * * Draws bar charts. The first page is a horizontal bar chart of the ten * longest rivers, each bar in its own color with its length inside it, and a * color key under the chart. The second page draws two charts with vertical * bars from the same data: the two series grouped by month, and the same * series stacked. */ final public class Example_27 { public Example_27() throws Exception { PDF pdf = new PDF( new BufferedOutputStream(new FileOutputStream("Example_27.pdf"))); pdf.setCompliance(Compliance.PDF_UA_1); pdf.setTitle("Bar Charts"); drawHorizontal(pdf); drawVertical(pdf); pdf.complete(); } private void drawHorizontal(PDF pdf) throws Exception { Font f1 = new Font(pdf, IBMPlexSans.Bold); f1.setSize(15f); Font f2 = new Font(pdf, IBMPlexSans.Regular); f2.setSize(9f); Font f3 = new Font(pdf, IBMPlexSans.Bold); f3.setSize(9f); Font f4 = new Font(pdf, IBMPlexSans.Regular); f4.setSize(8f); Page page = new Page(pdf, Letter.PORTRAIT); // The heading of the page, above the chart new TextLine(f1, "Rivers of the World") .setStructureType(StructElem.H1) .setFontSize(18f) .setLocation(36f, 40f) .drawOn(page); String[] rivers = { "Nile", "Amazon", "Yangtze", "Mississippi-Missouri", "Yenisey-Baikal-Selenga", "Huang He (Yellow)", "Ob-Irtysh", "Paraná", "Congo", "Amur"}; float[] lengths = {6650f, 6400f, 6300f, 5971f, 5540f, 5464f, 5410f, 4880f, 4700f, 4444f}; int[] colors = { 0x477aa8, 0x5f7e5f, 0x8b6f47, 0x8e7152, 0x517aa0, 0x967110, 0x687b68, 0x8e7155, 0x5c5c5c, 0x897154}; BarChart chart = new BarChart(f1, f2); chart.setLocation(36f, 70f); chart.setSize(540f, 400f); chart.setTitle("10 Longest Rivers in the World"); chart.setSubtitle("Length in kilometers · Color reflects typical sediment / pollution character"); chart.setCategories(rivers); chart.addSeries("", lengths, colors); chart.setHorizontal(true); chart.setGroupGap(0.4f); chart.setValueAxisMinMax(0f, 8000f, 4); chart.setGridLineWidth(0.75f); chart.setGridLineColor(0xe0e0e0); chart.setGridLineDashPattern("[] 0"); chart.setAxisLineWidth(0f); chart.setDrawValueLabels(true); chart.setValueLabelsInside(true); chart.setGroupingUsed(true); chart.setAltDescription( "The ten longest rivers in the world, in kilometers: Nile 6,650, Amazon 6,400, Yangtze 6,300, Mississippi-Missouri 5,971, Yenisey-Baikal-Selenga 5,540, Huang He (Yellow) 5,464, Ob-Irtysh 5,410, Paraná 4,880, Congo 4,700, Amur 4,444."); chart.drawOn(page); // The color key under the chart int gray = 0x444444; new TextLine(f3, "Color key (illustrative):") .setTextColor(gray).setLocation(171f, 496f).drawOn(page); int[] keyColors = {0x477aa8, 0x5f7e5f, 0x8e7155, 0x967110, 0x5c5c5c}; String[] keyTexts = { "Clear / low sediment", "Sediment-rich, relatively clean", "Polluted / industrial & agricultural", "Heavy natural sediment (loess)", "Natural dark tannin stain (Congo)"}; float[] keyX = {171f, 262f, 398f, 171f, 313f}; float[] keyY = {512f, 512f, 512f, 527f, 527f}; for (int i = 0; i < keyColors.length; i++) { // The swatches are rectangles, drawn as artifacts next to their text. new Rect(keyX[i], keyY[i] - 8.5f, 10.5f, 10.5f).setFillColor(keyColors[i]).drawOn(page); new TextLine(f4, keyTexts[i]) .setTextColor(gray).setLocation(keyX[i] + 15f, keyY[i]).drawOn(page); } String note = "Color mapping is illustrative; lengths and conditions vary by source and season."; new TextLine(f4, note) .setTextColor(0x696969).setLocation(576f - f4.stringWidth(note), 550f).drawOn(page); } private void drawVertical(PDF pdf) throws Exception { Page page = new Page(pdf, Letter.PORTRAIT); Font f1 = new Font(pdf, IBMPlexSans.Bold); f1.setSize(10f); Font f2 = new Font(pdf, IBMPlexSans.Regular); f2.setSize(8f); // The heading of the document, above the charts new TextLine(f1, "Sales in 2025 and 2026") .setStructureType(StructElem.H1) .setFontSize(18f) .setLocation(70f, 45f) .drawOn(page); String[] months = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; float[] units2025 = {45f, 65f, 31f, 45f, 65f, 31f, 38f, 52f, 47f, 59f, 66f, 72f}; float[] units2026 = {75f, 20f, 73f, 75f, 20f, 73f, 61f, 58f, 69f, 64f, 77f, 80f}; BarChart chart = new BarChart(f1, f2); chart.setLocation(70f, 70f); chart.setSize(500f, 300f); chart.setTitle("Units sold by month"); chart.setXAxisTitle("Month"); chart.setYAxisTitle("Units"); chart.setCategories(months); chart.addSeries("2025", units2025, Color.seagreen); chart.addSeries("2026", units2026, Color.indianred); chart.setGroupGap(0.4f); chart.setBarGap(0.1f); chart.setAltDescription("Units sold by month in 2025 and 2026, side by side: from 31 to 72 a month in 2025 and from 20 to 80 in 2026, the most in December in both years."); chart.drawOn(page); BarChart stacked = new BarChart(f1, f2); stacked.setLocation(70f, 420f); stacked.setSize(500f, 300f); stacked.setTitle("Units sold by month, stacked"); stacked.setXAxisTitle("Month"); stacked.setYAxisTitle("Units"); stacked.setCategories(months); stacked.addSeries("2025", units2025, Color.seagreen); stacked.addSeries("2026", units2026, Color.indianred); stacked.setStacked(true); stacked.setDrawValueLabels(true); stacked.setAltDescription("Units sold by month in 2025 and 2026, stacked: from 85 a month, in February and May, to 152 in December."); stacked.drawOn(page); } public static void main(String[] args) throws Exception { long time0 = System.currentTimeMillis(); new Example_27(); long time1 = System.currentTimeMillis(); System.out.printf("Example_27 => %4d ms%n", time1 - time0); } } // End of Example_27.java