Here is what I did:

I created two files simple.java and simple1.java with the following contents:

simple.java:
---------
import simple1.java;

class demo {
  public static void main(String args[]) {
    Point p;

    p = new Point();
    p.display();
  }
}


simple1.java:
--------
class Point {
  public int x = 10;
  public int y = 20;

  public void display() {
    System.out.print("Point is at: " + x + ", " + y + "\\n");
  }
}

Compile this and you get the following crash: (a number of things are clearly incorrect
but the crash shouldnt have occurred!)

[131][java_examples] ? javac simple.java
simple.java:3: Class simple1.java not found in import.
import simple1.java;
^
java.lang.NullPointerException
at java.tools.tree.MethodExpression.inline(MethodExpression.java)
at java.tools.tree.ExpressionStatement.inline(ExpressionStatement.java)
at java.tools.tree.CompoundStatement.inline(CompoundStatement.java)
at java.tools.javac.SourceField.inline(SourceField.java)
at java.tools.javac.SourceField.code(SourceField.java)
at java.tools.javac.SourceClass.compileClass(SourceClass.java)
at java.tools.javac.SourceClass.compile(SourceClass.java)
at java.tools.javac.Main.compile(Main.java)
at java.tools.javac.Main.main(Main.java)
.//simple.java:3: Class simple1.java not found in import.
import simple1.java;
^
.//simple.java:5: Class demo already defined in simple.java.
class demo {
      ^
.//simple.java:7: Class Point not found in type declaration.
    Point p;
    ^
.//simple.java:9: Class Point not found in new.
    p = new Point();
        ^
.//simple.java:10: Class Point not found in void main(java.lang.String[]).
    p.display();
             ^
error: An exception has occurred in the compiler, please file a bug report (###@###.###).
7 errors
[132][java_examples] ?