java程序使用JfreeChart畫折線圖

一段簡單的使用JfreeChart繪製折線圖的java程序實現一個小例子。

package org.ncut.decloud.linecharts;

import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class LineCharts extends ApplicationFrame {
	/** * */
	private static final long serialVersionUID = 1L;

	public LineCharts(String s) {
		super(s);
		setContentPane(createDemoLine());
	}

	public static void main(String[] args) {
		LineCharts fjc = new LineCharts("折線圖");
		fjc.pack();
		RefineryUtilities.centerFrameOnScreen(fjc);
		fjc.setVisible(true);

	}// 生成顯示圖表的面板

	public static JPanel createDemoLine() {
		JFreeChart jfreechart = createChart(createDataset());
		return new ChartPanel(jfreechart);
	}// 生成圖表主對象JFreeChart

	public static JFreeChart createChart(DefaultCategoryDataset linedataset) { // 定義圖表對象
		JFreeChart chart = ChartFactory.createLineChart("一季度銷售曲線", // 折線圖名稱
				"時間", // 橫座標名稱
				"銷售額(百萬)", // 縱座標名稱
				linedataset, // 數據
				PlotOrientation.VERTICAL, // 水平顯示圖像
				true, // include legend
				true, // tooltips
				false // urls
				);
		CategoryPlot plot = chart.getCategoryPlot();
		plot.setRangeGridlinesVisible(true); // 是否顯示格子線
		plot.setBackgroundAlpha(0.3f); // 設置背景透明度
		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setAutoRangeIncludesZero(true);
		rangeAxis.setUpperMargin(0.20);
		rangeAxis.setLabelAngle(Math.PI / 2.0);
		return chart;
	}// 生成數據

	public static DefaultCategoryDataset createDataset() {
		DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
		// 各曲線名稱
		String series1 = "冰箱";
		String series2 = "彩電";
		String series3 = "洗衣機";
		// 橫軸名稱(列名稱)
		String type1 = "1月";
		String type2 = "2月";
		String type3 = "3月";
		linedataset.addValue(0.0, series1, type1);
		linedataset.addValue(4.2, series1, type2);
		linedataset.addValue(3.9, series1, type3);
		linedataset.addValue(1.0, series2, type1);
		linedataset.addValue(5.2, series2, type2);
		linedataset.addValue(7.9, series2, type3);
		linedataset.addValue(2.0, series3, type1);
		linedataset.addValue(9.2, series3, type2);
		linedataset.addValue(8.9, series3, type3);
		return linedataset;
	}
}

 

經師兄推薦一個畫圖工具gnuplot貌似更好使，配套gsl計算函數庫，號稱能代替matlab。下一步學習使用上。

 

java實現實現柱狀圖 餅狀圖的實例：http://blog.csdn.net/xuexin25java/article/details/7920476