> -_-
> - _ - 

Use BufferedOutputStream, and array of ' ', '-'

BufferedOutputStream out=new BufferedOutputStream(System.out, 1024);

...

String space="                                ";
String dash="--------------------------------";
for (int i=0;i<5;i++) {
	space+=space;
	dash+=dash;
}
this.space=space.getBytes();
this.dash=dash.getBytes();

...

out.write(space, 0, width-alen);
out.write(abytes, 0, alen);
out.write('\n');

...

etc. 1000x faster.