初学JAVA时所写的。可以通过菜单选择、鼠标拖曳图片两种方式来选择图片。可以放大、缩小、旋转、幻灯片等方式显示图片，同时显示图片属性。-When written in JAVA beginner. Through menu options, drag and drop images in two ways to select picture. Can enlarge, narrow, rotate, slide show images, etc., at the same time show the picture properties.