No compiler access

[Michael Hall]

	    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
The following is line 54
	    StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);

java.lang.NullPointerException
	at org.cmdline.cmds.dojava.main(dojava.java:54)

I assume known to be missing?