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单项选择题
A.public interface Jextends I{}
B.public interface Jimplements I{}
C.public interface Jinherits I{}
D.public interface Jinstanceof I{}
单项选择题
A.returncode.hashCode();
B.returncode.hashCode()+age*11;
C.returncode.hashCode()+name.hashCode()+age*11;
D.returnsuper.hashCode();