用Java写一个涂鸦板控制鼠标移动结合画图功能实现。鼠标拖拽才开始绘制，松开鼠标则停止绘制。

好的，以下是一个简单的Java涂鸦板程序的示例代码，希望能帮到您：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class DrawingBoard extends JFrame implements MouseListener, MouseMotionListener {
    private int lastX, lastY;
    private boolean isDragging;
    private Graphics g;

    public DrawingBoard() {
        super("Java涂鸦板");
        setSize(600, 400);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);

        addMouseListener(this);
        addMouseMotionListener(this);
    }

    public void mousePressed(MouseEvent e) {
        lastX = e.getX();
        lastY = e.getY();
        isDragging = true;
    }

    public void mouseReleased(MouseEvent e) {
        isDragging = false;
    }

    public void mouseDragged(MouseEvent e) {
        if (isDragging) {
            int x = e.getX();
            int y = e.getY();
            g.drawLine(lastX, lastY, x, y);
            lastX = x;
            lastY = y;
        }
    }

    public void mouseClicked(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}
    public void mouseMoved(MouseEvent e) {}

    public void paint(Graphics g) {
        super.paint(g);
        this.g = g;
        g.setColor(Color.BLUE);
    }

    public static void main(String[] args) {
        new DrawingBoard();
    }
}

该程序使用了Java的Swing库来创建图形用户界面，实现了MouseListener和MouseMotionListener接口来监听鼠标事件，以及Graphics类来进行画图操作。当鼠标拖动时，使用drawLine()方法绘制线条，松开鼠标则停止绘制。希望对您有所帮助。