多选题public class X { public X aMethod() { return this;} } public class Y extends X { } Which two methods can be added to the definition of class Y?()Apublic void aMethod() {}Bprivate void aMethod() {}Cpublic void aMethod(String s) {}Dprivate Y aMethod() { return null; }Epublic X aMethod() { return new Y(); }
多选题
public class X { public X aMethod() { return this;} } public class Y extends X { } Which two methods can be added to the definition of class Y?()
A
public void aMethod() {}
B
private void aMethod() {}
C
public void aMethod(String s) {}
D
private Y aMethod() { return null; }
E
public X aMethod() { return new Y(); }
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