费解!怎么就不行呢?
dx1 = nSysX * ( this.getSize().width / imageBackground.getWidth(null) );
dx2 = ( nSysX + imageWidthSystem ) * ( this.getSize().width / imageBackground.getWidth(null) );
dy1 = nSysY * ( this.getSize().height / imageBackground.getHeight(null) );
dy2 = ( nSysY + imageHeightSystem ) * ( this.getSize().height / imageBackground.getHeight(null) );
sx1 = 0;
sy1 = 0;
sx2 = imageWidthSystem;
sy2 = imageHeightSystem;
//To show image of system
g.drawImage(imageSystem,dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2,null);