JAVA做一个可以鼠标绘图键盘写字的画板

Posted 2020-11-02 huchangqing

工具：eclipse

语言：java

成果：

源代码：

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionAdapter;

 

import javax.swing.JFrame;

import javax.swing.JPanel;

 

class HuiTu{

    JFrame mFrame=new JFrame("画板");

    JPanel mPanel=new JPanel();

    int LastX=0;

    int LastY=0;

public HuiTu() {

        // TODO Auto-generated constructor stub

    mFrame.setSize(800, 800);

    mFrame.setVisible(true);

    mFrame.setForeground(Color.BLUE);

    mFrame.add(mPanel);

    mPanel.setBackground(Color.WHITE);

      

      

    mFrame.addMouseListener(new MouseAdapter() {

        public void mousePress(MouseEvent e) {

            LastX = e.getX();

            LastY = e.getY();

                

            }

        });

    mFrame.addMouseMotionListener(new MouseMotionAdapter() {

        public void mouseDragged(MouseEvent e) {

            int x=e.getX();

            int y=e.getY();

            Graphics g =mFrame.getGraphics();

            g.drawLine(LastX, LastY, x, y);

            LastX=e.getX();

            LastY=e.getY();

                

            }

        });

    mFrame.addKeyListener(new KeyAdapter() {

        public void keyTyped(KeyEvent e) {

            String string=String.valueOf(e.getKeyChar());

            mFrame.getGraphics().drawString(string, LastX, LastY);

            LastX += 30;

          

                

            }

        });

    }

 

}

public class C5T8 {

 

    public static void main(String[] args) {

        // TODO Auto-generated method stub

new HuiTu();

    }

 

}