FULL PRODUCT VERSION :
java version "1.8.0_102"
Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux, version 3.2.0-99-generic-pae
Mac OS X, version 10.8.5

A DESCRIPTION OF THE PROBLEM :
The following charsets returned by Charset.availableCharsets() does not contain itself
CESU-8
UTF-32
UTF-32BE
UTF-32LE
x-eucJP-Open
x-JISAutoDetect
X-UTF-32BE-BOM
X-UTF-32LE-BOM

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Charset(CESU-8).contains(Charset(CESU-8)) returns true
Charset(UTF-32).contains(Charset(UTF-32)) returns true
Charset(UTF-32BE).contains(Charset(UTF-32BE)) returns true
Charset(UTF-32LE).contains(Charset(UTF-32LE)) returns true
Charset(x-eucJP-Open).contains(Charset(x-eucJP-Open)) returns true
Charset(x-JISAutoDetect).contains(Charset(x-JISAutoDetect)) returns true
Charset(X-UTF-32BE-BOM).contains(Charset(X-UTF-32BE-BOM)) returns true
Charset(X-UTF-32LE-BOM).contains(Charset(X-UTF-32LE-BOM)) returns true
ACTUAL -
Charset(CESU-8).contains(Charset(CESU-8)) returns false
Charset(UTF-32).contains(Charset(UTF-32)) returns false
Charset(UTF-32BE).contains(Charset(UTF-32BE)) returns false
Charset(UTF-32LE).contains(Charset(UTF-32LE)) returns false
Charset(x-eucJP-Open).contains(Charset(x-eucJP-Open)) returns false
Charset(x-JISAutoDetect).contains(Charset(x-JISAutoDetect)) returns false
Charset(X-UTF-32BE-BOM).contains(Charset(X-UTF-32BE-BOM)) returns false
Charset(X-UTF-32LE-BOM).contains(Charset(X-UTF-32LE-BOM)) returns false

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.Map;
import java.nio.charset.Charset;

/**
 * Each charset from all available charsets must contains itself.
 */

public class ContainsTest {


    public int callSystemGC = 1;


    public static void main(String[] args) {

        boolean failed = false;

        for (Map.Entry<String, Charset> entry : Charset.availableCharsets().entrySet()) {
            String name = entry.getKey();
            Charset charset = entry.getValue();
            boolean contains = charset.contains(charset);

            if (!contains) {
                System.out.println("Charset(" + charset.name() + ").contains(Charset(" + charset.name()
                        + ")) returns " + contains);
                failed = true;
            }
        }
        if (failed)
            throw new RuntimeException("Charset.contains(itself) returns false for some charsets");
        return;
    }
}

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