進口？Java . awt . canvas；進口？Java . awt . graphics；進口？Java . awt . graphics 2d；進口？Java . awt . rendering hints；進口？Java . awt . image . buffered image；？/**?*?@作者？正業生？*/公共？班級？RotateImageCanvas？延伸？畫布？器物？Runnable{private？靜電？決賽？龍？serialVersionUID？=?-1997487731464495923 l；？BufferedImage？imgBufferedImage？rotatedImg？int？輩分？=?0;？公？RotateImageCanvas(buffered image？img){ super()；this.img？=?img新的？線程(這個)。start()；}?@Overridepublic？作廢？run(){while？(真){//A，配合B的代碼確定轉速降級？+=?1;輩分？%=?360;repaint()；試試{如果？(輩分？==?0){// Set Thread.sleep(3？*?1000);}else{//考慮到視覺的流暢度，這裏應該不是40左右。thread . sleep(30)；} }抓？(中斷異常？e){//？托多？自動生成？接住？blocke . printstacktrace()；}}}?@Overridepublic？作廢？油漆(圖形？graphics){super.paint(圖形)；//獲取旋轉了指定角度的圖像。為了避免累積誤差，這裏是原圖像旋轉的rotatedImg？=?rotateImage(img，輩分)；//繪制旋轉後的圖片graphics.drawImage(rotatedImg，？0,?0,?這個)；}?/**?*?將圖片旋轉到指定的角度。？*?註:1。該方法實現了基於中點的圖像旋轉。如果要繞指定點旋轉，需要配合Matrix類。*2.為了避免圖像被裁剪，結果圖像的大小也需要動態計算？*3.現在有壹個旋轉後的黑色背景。如果不需要這種效果，需要設置結果圖的Alpha模式？**?@param？bufferedimage？*目標圖像？*?@param？學位？*旋轉角度？*?@回歸？*/私人？BufferedImage？rotateImage(BufferedImage？bufferedimage，？int？度){int？w？=?buffered image . getwidth()；int？h？=?buffered image . get height()；int？類型？=?bufferedimage.getColorModel()。get transparency()；BufferedImage？imgGraphics2D？graphics2d(graphics2d？=?(img？=?新的？BufferedImage(w，h，？類型))。createGraphics())。setRenderingHint(rendering hints。關鍵_插值，？呈現提示。值_插值_雙線性)；graphics 2d . rotate(math . tora dians(degree)，？w？/?2,?h？/?2);graphics 2d . draw image(buffered image，？0,?0,?null)；graphics 2d . dispose()；回歸？img}}
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