摘要：
代码如下import java.awt.BasicStroke;import java.awt.Color;import java.awt.Font;import java.awt.GradientPaint;import java.io.File;import java.io.IOException;import javax.swing.JPanel;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.ChartUtilities;import org.jfr 阅读全文
