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我是在java中使用paint和lines的新手，如果答案很明显，我很抱歉。无论如何，我希望我的线条流畅，这就是为什么我有“圆圈”加入来制作一条带圆角的线条，问题是它无法识别鼠标何时释放，所以当我尝试写另一个字母将碎石上的两个点连接起来。对我的应用程序进行编程以在不连接的情况下获得流畅线条的最佳方法是什么？

package pac;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.geom.Line2D;
import java.util.ArrayList;

import javax.swing.*;

public class Frame extends JPanel{

    private final ArrayList<Point> point = new ArrayList<>();

    public Frame() {
        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent event) {
                point.add(event.getPoint());
                repaint();
            }
        });

        addMouseMotionListener(new MouseMotionAdapter() {
        public void mouseDragged(MouseEvent event) {
            point.add(event.getPoint());
            repaint();
        }
    });
}

public void paintComponent(Graphics g) {
    super.paintComponents(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.setColor(new Color(0, 0, 128));
    g2.setStroke(new BasicStroke(15f,
                                 BasicStroke.CAP_ROUND,
                                 BasicStroke.JOIN_ROUND));
 //   if(!mouserelased) {
        for (int i = 1; i < point.size(); i++)
            g2.draw(new Line2D.Float(point.get(i-1), point.get(i)));
 //   }
    }

public static void main(String[] args) {
    JFrame f = new JFrame();
    f.add(new Frame());
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(800, 600);
    f.setVisible(true);
}
}
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