Java Netbeans에서 라이브러리를 사용하여 선형 차트 그래프 프로그램을 만드는 방법

이 기사에서는 NetBeans에서 복잡하지 않고 쉽게 꺾은선형 차트를 만드는 방법을 공유합니다. 아래와 같은 예:

JFreeChart 라이브러리를 사용하여 Netbeans에서 꺾은선형 차트를 만드는 방법

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package GrafikLine;
import java.awt.*;
    import java.awt.geom.*;
    import javax.swing.*;
/**
 *
 * @author buahdjayamandiri
 */
public class LineChart extends JPanel{
    public LineChart() {
this.setPreferredSize(new Dimension(400, 340));
this.setBackground(Color.WHITE);
}
    protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
GeneralPath gp = new GeneralPath(GeneralPath.WIND_NON_ZERO);
gp.moveTo(30,290);
gp.lineTo(370, 290);
gp.moveTo(30,90);
gp.lineTo(370, 90);
gp.moveTo(30, 130);
gp.lineTo(370, 130);
gp.moveTo(30, 170);
gp.lineTo(370, 170);
gp.moveTo(30, 210);
gp.lineTo(370, 210);
gp.moveTo(30, 250);
gp.lineTo(370, 250);
//LineCharts atau garis titik koordinat
gp.moveTo(79, 250);
gp.lineTo(114, 170);
gp.moveTo(114,170);
gp.lineTo(145,90);
gp.moveTo(145,90);
gp.lineTo(180,130);
gp.moveTo(180, 130);
gp.lineTo(215,170);
gp.closePath();
g2.draw(gp);
//membentuk grafik dan variable
g2.drawString("100",7,90);
//g2.drawString("90",13,110);
g2.drawString("80",13,130);
//g2.drawString("70",13,150);
g2.drawString("60",13,170);
//g2.drawString("50",13,190);
g2.drawString("40",13,210);
//g2.drawString("30",13,230);
g2.drawString("20",13,250);
//g2.drawString("10", 13, 270);
g2.drawString("0",20,290);
g2.drawString("2016",70,310);
g2.drawString("2017",105,310);
g2.drawString("2018",140,310);
g2.drawString("2019",175,310);
g2.drawString("2020",210,310);
//titik koordinat
Shape kotak1 = new Rectangle2D.Double(76,250,5,5); //20
Shape kotak2 = new Rectangle2D.Double(111,170,5,5); //60
Shape kotak3 = new Rectangle2D.Double(143,90,5,5); //100
Shape kotak4 = new Rectangle2D.Double(179,128,5,5); //80
Shape kotak5 = new Rectangle2D.Double(213,169,5,5); //60
g2.setColor(Color.red);
g2.fill(kotak1);
g2.fill(kotak2);
g2.fill(kotak3);
g2.fill(kotak4);
g2.fill(kotak5);
}
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package GrafikLine;
import com.sun.glass.events.WindowEvent;
import java.awt.event.WindowAdapter;
import javax.swing.JFrame;
/**
 *
 * @author buahdjayamandiri
 */
public class MainLineChart {
    public static void main(String[] args) {
// TODO code application logic here
JFrame frame = new JFrame("Line Charts");
frame.addWindowFocusListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
//tambahkan panel
LineChart campas = new LineChart();
frame.getContentPane().add(campas);
frame.pack();
frame.setVisible(true);
}
}