java final 数组的使用技巧

    public static WindowManagerService main(final Context context,            final PowerManagerService pm, final DisplayManagerService dm,            final InputManagerService im,            final Handler uiHandler, final Handler wmHandler,            final boolean haveInputMethods, final boolean showBootMsgs,            final boolean onlyCore) {        final WindowManagerService[] holder = new WindowManagerService[1];        wmHandler.runWithScissors(new Runnable() {            @Override            public void run() {                holder[0] = new WindowManagerService(context, pm, dm, im,                        uiHandler, haveInputMethods, showBootMsgs, onlyCore);            }             }, 0);        return holder[0];    }

使用final 数组类型，才能再run函数里面重新进行赋值。