EclipseEnumTest - Eclipse compile code but haven't

gistfile1.java

public class EnumTest {
    enum Day {
		// The constructor EnumTest3.Day(int) is undefined
		Monday(1), Sunday(2)
	};

	public static void main(String[] args) {
		Day d = null;
		System.out.println(d.Monday);
	}
}
// null

1. Eclipse javac compile it and produce for console : null
2. console javac haven't compile it : c:\src\enum_\inner>javac EnumTest.java
   EnumTest.java:6: error: constructor Day in enum Day cannot be applied to given t
   ypes;
   Monday(1), Sunday(2)
   ^
   required: no arguments
   found: int
   reason: actual and formal argument lists differ in length
   EnumTest.java:6: error: constructor Day in enum Day cannot be applied to given t
   ypes;
   Monday(1), Sunday(2)
   ^
   required: no arguments
   found: int
   reason: actual and formal argument lists differ in length
   2 errors