鼠标监听事件、模拟画图工具

本文介绍了如何在Java中利用鼠标监听事件实现一个简单的画图工具。通过监听鼠标按下、移动和释放等操作,实现在画布上绘制图形的功能。

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一、鼠标监听

目的:想要实现鼠标画画!
思路:
在这里插入图片描述

package com.massimo.mouselistener;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.ArrayList;
import java.util.Iterator
function varargout = net1(varargin) % NET1 M-file for net1.fig % NET1, by itself, creates a new NET1 or raises the existing % singleton*. % % H = NET1 returns the handle to a new NET1 or the handle to % the existing singleton*. % % NET1('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in NET1.M with the given input arguments. % % NET1('Property','Value',...) creates a new NET1 or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before net1_OpeningFunction gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to net1_OpeningFcn via varargin. % % *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one % instance to run (singleton)". % % See also: GUIDE, GUIDATA, GUIHANDLES % Last Modified by GUIDE v2.5 02-Aug-2009 23:24:02 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @net1_OpeningFcn, ... 'gui_OutputFcn', @net1_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT % --- Executes just before net1 is made visible. function net1_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % varargin command line arguments to net1 (see VARARGIN) % Choose de
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