FULL PRODUCT VERSION :
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) Client VM (build 25.0-b70, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 32-bit

A DESCRIPTION OF THE PROBLEM :
javax.script.Bindings hides "Date" key.
After
        bindings.put("Abc", "123");
        bindings.put("Date", "666");
        bindings.put("Time", "777");
        bindings.put("Xyz", "789");
it says it only contains "Abc", "Time" and "Xyz".

Please find the evidence test case below:



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute the following statements:
        bindings.put("Abc", "123");
        bindings.put("Date", "666");
        bindings.put("Time", "777");
        bindings.put("Xyz", "789");
And then print "bindings" variable.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
bindings = [Abc=123, Date=666, Time=777, Xyz=789]
bindings['Date'] = 666
ACTUAL -
bindings = [Abc=123, Time=777, Xyz=789]
bindings['Date'] = 666

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.script.Bindings;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class BindingsBugTest {
    public static void main(String... args) {
        ScriptEngine scriptEngine = new ScriptEngineManager().getEngineByName("JavaScript");
        final Bindings bindings = scriptEngine.createBindings();
        bindings.put("Abc", "123");
        bindings.put("Date", "666");
        bindings.put("Time", "777");
        bindings.put("Xyz", "789");
        System.out.println("bindings = " + bindings.entrySet());
        System.out.println("bindings['Date'] = " + bindings.get("Date"));
    }

}
---------- END SOURCE ----------

SUPPORT :
YES