drawRect画一个矩形，怎么在这个矩形中显示文字

import java.awt.Color;import java.awt.Cursor;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Point;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import javax.swing.JFrame;import javax.swing.JTextArea;import javax.swing.text.BadLocationException;public class AA extends JFrame{        public static void main(String[] args) {        new AA();    }        public AA(){        setResizable(false);        setSize(new Dimension(500,400));        setLocationRelativeTo(null);        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setVisible(true);        initData();    }        private void initData(){        this.add(new MyTextArea());    }        /**     * 自定义JTextArea     * @author Administrator     *     */    private class MyTextArea extends JTextArea implements MouseMotionListener,MouseListener{                private Point pressPoint;        //按下时坐标位置                private Point currenPoint;        //当前鼠标拖动时的位置        public MyTextArea(){            setPreferredSize(new Dimension(500,400));            setLineWrap(true);            this.addMouseListener(this);            this.addMouseMotionListener(this);            setSelectionColor(Color.white);                    }                public void paint(Graphics g){            super.paint(g);            if(pressPoint != null && currenPoint != null){                g.setColor(Color.BLACK);                int drawRectPara[] = new int[4];        //画矩形的4个参数                if(pressPoint.x < currenPoint.x){                    drawRectPara[0] = pressPoint.x;                    drawRectPara[2] = currenPoint.x - pressPoint.x;                }else{                    drawRectPara[0] = currenPoint.x;                    drawRectPara[2] = pressPoint.x - currenPoint.x;                }                                if(pressPoint.y < currenPoint.y){                    drawRectPara[1] = pressPoint.y;                    drawRectPara[3] = currenPoint.y - pressPoint.y;                }else{                    drawRectPara[1] = currenPoint.y;                    drawRectPara[3] = pressPoint.y - currenPoint.y;                }                            g.drawRect(drawRectPara[0],drawRectPara[1],drawRectPara[2],drawRectPara[3]);            }        }                @Override        public void mouseDragged(MouseEvent arg0) {            // TODO Auto-generated method stub            currenPoint = arg0.getPoint();            repaint();        }                @Override        public void mousePressed(MouseEvent arg0) {            // TODO Auto-generated method stub            pressPoint = arg0.getPoint();            this.setCursor(new Cursor(Cursor.HAND_CURSOR));        }        @Override        public void mouseReleased(MouseEvent arg0) {            // TODO Auto-generated method stub            pressPoint = null;            this.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));        }                                @Override        public void mouseMoved(MouseEvent arg0) {            // TODO Auto-generated method stub                    }        @Override        public void mouseClicked(MouseEvent arg0) {            // TODO Auto-generated method stub                    }        @Override        public void mouseEntered(MouseEvent arg0) {            // TODO Auto-generated method stub                    }        @Override        public void mouseExited(MouseEvent arg0) {            // TODO Auto-generated method stub                    }            }}