通过移动坐标定位JTextField？

Question

（上图来自AutoCAD）

我的应用程序使用两个Point类变量在JPanel上绘制一条线：＆＃34; startPoint＆＃34;和＆＃34; finishPoint＆＃34;。

＆＃34;的startPoint＆＃34;从第一次鼠标单击设置。一旦建立起始点，就在光标位置上设置finishPoint变量。因此，线条随着鼠标移动动态移动/增长，直到＆＃34; finishPoint＆＃34;通过第二次鼠标点击确定。

在建立startPoint且线条动态变化的时间段内，我想将JTextField定位在线条中点（如果可能的话，稍微偏离中心，以免它遮挡线条） ？

我知道如果我在不使用布局管理器的情况下尝试定位组件，我会大声嚷嚷，但我无法看到布局管理器如何提供帮助。我想使用坐标来定位JTextField。我能想到的唯一方法是以某种方式将文本字段添加到形状中。除此之外，我不知所措。

有人能让我朝着正确的方向前进吗？

我的代码应该有人想看到它：

package Drawing;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.Line2D;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JPanel;

/*
 * An extension to P2PLines. A line from point A to point B but with an     animation.
 */

public class LineAnimation extends JPanel implements MouseListener,     MouseMotionListener
{
    private Graphics g;
    private Point lineStart = new Point(0, 0);
    private Point lineFinish = new Point(0, 0);
    private boolean drawing;
    int globalX = 0, globalY;
    ArrayList<Line2D> edges = new ArrayList<>();

public LineAnimation()
{
    setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
    drawing = false;
}

@Override public void mouseClicked(MouseEvent me) {}   
@Override public void mousePressed(MouseEvent me) 
{
    if (drawing) 
    {
        g = getGraphics();  // Get Graphics content
        g.setColor(Color.black);
        lineFinish.move(me.getX(), me.getY());
        g.drawLine(lineStart.x, lineStart.y, me.getX(), me.getY());
        edges.add(new Line2D.Float(lineStart.x, lineStart.y, lineFinish.x, lineFinish.y));
        drawing = false;
        g.dispose();
    }
    else 
    {
        lineStart.move(me.getX(), me.getY());
        drawing = true;
    }
}

@Override public void paintComponent(Graphics g)
{
    super.paintComponent(g);        
    drawPreviousLine((Graphics2D)g);

    if (drawing)
    {g.drawLine(lineStart.x, lineStart.y, globalX, globalY);}
}

private void drawPreviousLine(Graphics2D g)
{
    for(Line2D lines: edges)
    {g.draw(lines);}
}

@Override
public void mouseMoved(MouseEvent me) 
{
    repaint();
    globalX = me.getX();
    globalY = me.getY();        
}

@Override public void mouseReleased(MouseEvent me) {}
@Override public void mouseEntered(MouseEvent me) {}
@Override public void mouseExited(MouseEvent me) {}
@Override public void mouseDragged(MouseEvent me) {}

public static void main(String[] args)
{
    JFrame frame = new JFrame("Drawing Frame");
    frame.setSize(500, 500);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLocationRelativeTo(null);

    LineAnimation drawingFrame = new LineAnimation();
    frame.add(drawingFrame);
    frame.setVisible(true);
    drawingFrame.addMouseListener(drawingFrame);
    drawingFrame.addMouseMotionListener(drawingFrame);
}

}