linux-t16c:/regression # cd /regression/test/javax/swing/JInternalFrame/4251301
linux-t16c:/regression/test/javax/swing/JInternalFrame/4251301 # /regression/jdk1.7.0_71/bin/javac *.java
bug4251301.java:35: warning: OSInfo is internal proprietary API and may be removed in a future release
import sun.awt.OSInfo;
              ^
bug4251301.java:36: warning: SunToolkit is internal proprietary API and may be removed in a future release
import sun.awt.SunToolkit;
              ^
bug4251301.java:40: warning: SunToolkit is internal proprietary API and may be removed in a future release
    private static final SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
                         ^
bug4251301.java:40: warning: SunToolkit is internal proprietary API and may be removed in a future release
    private static final SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
                                               ^
bug4251301.java:43: warning: OSInfo is internal proprietary API and may be removed in a future release
        if (OSInfo.getOSType() == OSInfo.OSType.MACOSX) {
            ^
bug4251301.java:43: warning: OSInfo is internal proprietary API and may be removed in a future release
        if (OSInfo.getOSType() == OSInfo.OSType.MACOSX) {
                                  ^
6 warnings