How do I get the instance of sun.misc.Unsafe?

Question

How do I get the instance of the unsafe class?

I always get the security exception. I listed the code of the OpenJDK 6 implementation. I would like to mess around with

Answer 1

If you use Spring, you can use its class called UnsafeUtils

at org.springframework.objenesis.instantiator.util.UnsafeUtils

public final class UnsafeUtils {
    private static final Unsafe unsafe;

    private UnsafeUtils() {
    }

    public static Unsafe getUnsafe() {
        return unsafe;
    }

    static {
        Field f;
        try {
            f = Unsafe.class.getDeclaredField("theUnsafe");
        } catch (NoSuchFieldException var3) {
            throw new ObjenesisException(var3);
        }

        f.setAccessible(true);

        try {
            unsafe = (Unsafe)f.get((Object)null);
        } catch (IllegalAccessException var2) {
            throw new ObjenesisException(var2);
        }
    }
}