Doesn't Output for 1.8x or Below Unlike Old Launcher Did

System.out.println(); doesn't work as well as System.out.print and some other prints that java uses. Why is there no output on the launcher? Fix this I can't do anything on a lan world nor mod anything, nor check any erroring command blocks for 1.8 and below. No output whatsoever none , not from forge, not from vanilla versions nothing