FULL PRODUCT VERSION :
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 Professional SP1

EXTRA RELEVANT SYSTEM CONFIGURATION :
Netbens 8.0 from official site.

A DESCRIPTION OF THE PROBLEM :
Cant compile applet even if the project properties are set to compile target JDK 1.6.

cannot find symbol
 symbol: method getWindow(MyApplet)
 location: class JSObject
----
(Alt-Enter shows hints)
 
Problem:
Not found netscape.javascript.JSObject.getWindow(java.applet.Applet applet).

REGRESSION. Last worked in version 7u51

ADDITIONAL REGRESSION INFORMATION:
package netscape.javascript;

public abstract class JSObject {

    protected JSObject() {
        // <editor-fold defaultstate="collapsed" desc="Compiled Code">
        /* 0: aload_0
         * 1: invokespecial java/lang/Object."<init>":()V
         * 4: return
         * */
        // </editor-fold>
    }

    public abstract Object call(String string, Object[] os) throws JSException;

    public abstract Object eval(String string) throws JSException;

    public abstract Object getMember(String string) throws JSException;

    public abstract void setMember(String string, Object o) throws JSException;

    public abstract void removeMember(String string) throws JSException;

    public abstract Object getSlot(int i) throws JSException;

    public abstract void setSlot(int i, Object o) throws JSException;
}


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Simple Java SE project:

package test;

import javax.swing.JApplet;
import netscape.javascript.JSObject;

public class MyApplet extends JApplet {

    private static JSObject thisWindow;

    @Override
    public void init() {
        try {
            thisWindow = JSObject.getWindow(this);
        } catch (Throwable thr) {
            System.out.println(thr);
        }
    }
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compilation
ACTUAL -
Error. No compilation.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
cannot find symbol
 symbol: method getWindow(MyApplet)
 location: class JSObject
----
(Alt-Enter shows hints)
 

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package test;

import javax.swing.JApplet;
import netscape.javascript.JSObject;

public class MyApplet extends JApplet {

    private static JSObject thisWindow;

    @Override
    public void init() {
        try {
            thisWindow = JSObject.getWindow(this);
        } catch (Throwable thr) {
            System.out.println(thr);
        }
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Downgrading JDK version by uninstalling new one.

SUPPORT :
YES