import?java.awt.*;
import?java.awt.event.*;
import?java.awt.image.*;
import?java.awt.color.*;
import?java.awt.geom.*;
import?javax.swing.*;
import?java.io.*;

//?圖像縮小與放大演示

public?class?ScaleImageDemo?extends?Jframe?{
	private?JPanel?panel?=?new?JPanel（）;?//面板panel用于容納圖像放大、縮小、還原按鈕
	private?JButton?jbFile?=?new?JButton（“打開圖像文件“）;?//打開圖像文件按鈕
	private?JButton?jbZoomIn?=?new?JButton（“放大“）;?//圖像放大按鈕
	private?JButton?jbZoomOut?=?new?JButton（“縮小“）;?//圖像縮小按鈕
	private?JButton?jbReset?=?new?JButton（“還原“）;?//圖像還原按鈕
	ScalePane?showImagePane?=?new?ScalePane（）;?//創(chuàng)建showImagePane對象用于繪制圖像
	Container?content?=?getContentPane（）;?//獲得窗口的容器

????//構(gòu)造函數(shù)
	public?ScaleImageDemo（）?{
		super（“圖像的縮小與放大“）;?//調(diào)用父類構(gòu)造器設(shè)置窗口標(biāo)題欄
		//為按鈕添加動作監(jiān)聽器
		jbFile.addActionListener（new?ButtonActionListener（））;
		jbZoomIn.addActionListener（new?ButtonActionListener（））;
		jbZoomOut.addActionListener（new?ButtonActionListener（））;
		jbReset.addActionListener（new?ButtonActionListener（））;		

		//把圖像放大按鈕、圖像縮小按鈕

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????12917??1993-04-19?20:13??1.jpg
?????文件??????156054??2004-06-01?23:50??50-1.bmp
?????文件??????156054??2004-06-01?23:51??50-2.bmp
?????文件???????12917??1993-04-19?20:13??image.jpg
?????文件?????????852??2019-09-25?22:33??ScaleImageDemo$1.class
?????文件????????1375??2019-09-25?22:33??ScaleImageDemo$ButtonActionListener.class
?????文件????????2279??2019-09-25?22:33??ScaleImageDemo$ScalePane.class
?????文件????????2572??2019-09-25?22:33??ScaleImageDemo.class
?????文件????????5833??2004-06-06?00:03??ScaleImageDemo.java
?????文件???????16384??2011-02-09?16:50??Thumbs.db