Overrides warnings in jdi and jconsole

When building jdk8, there are a couple of overrides warnings in jdi and jconsole:

/Users/khazra/Development/jdk8_push_repo/jdk/src/share/classes/com/sun/tools/jdi/SDE.java:156: warning: [overrides] Class SDE.LineStratum overrides equals, but neither it nor any superclass overrides hashCode method
    class LineStratum {
    ^

/Users/khazra/Development/jdk8_push_repo/jdk/src/share/classes/sun/tools/jconsole/inspector/XObject.java:36: warning: [overrides] Class XObject overrides equals, but neither it nor any superclass overrides hashCode method
public class XObject extends JLabel {
       ^