// multiple extend | |
import java.io.*; | |
class c1 {} | |
class c2 implements Serializable, Externalizable { | |
public void writeExternal(ObjectOutput out) throws IOException { | |
} | |
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { | |
} | |
} | |
class a <error descr="Class cannot extend multiple classes">extends c1,c2</error> { | |
} |