单项选择题

23.intz=5；24.25.publicvoidstuff1（intx）{26.assert（x>0）；27.switch（x）{28.case2：x=3；29.default：assertfalse；}}30.31.privatevoidstuff2（inty）{assert（y<0）；}32.33.privatevoidstuff3（）{assert（stuff4O）；}34.35.privatebooleanstuff4（）{z=6；returnfalse；}Whichistrue？（）
A.Alloftheassertstatementsareusedappropriately.
B.Onlytheassertstatementonline31isusedappropriately.
C.Theassertstatementsonlines29and31areusedappropriately.
D.Theassertstatementsonlines26and29areusedappropriately.
E.Theassertstatementsonlines29and33areusedappropriately.
F.Theassertstatementsonlines29，31，and33areusedappropriately.
G.Theassertstatementsonlines26，29，and31areusedappropriately.

A.intz=5；24.25.publicvoidstuff1（intx）{26.assert（x>0）；27.switch（x）{28.case2：x=3；29.default：assertfalse；}}30.31.privatevoidstuff2（inty）{assert（y<0）；}32.33.privatevoidstuff3（）{assert（stuff4O）；}34.35.privatebooleanstuff4（）{z=6；returnfalse；}Whichistrue？（）
A.Alloftheassertstatementsareusedappropriately.
B.Onlytheassertstatementonline31isusedappropriately.
C.Theassertstatementsonlines29and31areusedappropriately.
D.Theassertstatementsonlines26and29areusedappropriately.
E.Theassertstatementsonlines29and33areusedappropriately.
F.Theassertstatementsonlines29，31，and33areusedappropriately.
G.Theassertstatementsonlines26，29，and31areusedappropriately.

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11.publicstaticvoidmain（String[]args）{12.Integeri=uewInteger（1）+newInteger（2）；13.switch（i）{14.case3：System.out.println（”three”）；break；15.default：System.out.println（”other”）；break；16.}17.}Whatistheresult？（）
A.three
B.other
C.Anexceptionisthrownatruntime.
D.Compilationfailsbecauseofanerroronline12.
E.Compilationfailsbecauseofanerroronline13.
F.Compilationfailsbecauseofanerroronline15.

A.publicstaticvoidmain（String[]args）{12.Integeri=uewInteger（1）+newInteger（2）；13.switch（i）{14.case3：System.out.println（”three”）；break；15.default：System.out.println（”other”）；break；16.}17.}Whatistheresult？（）
A.three
B.other
C.Anexceptionisthrownatruntime.
D.Compilationfailsbecauseofanerroronline12.
E.Compilationfailsbecauseofanerroronline13.
F.Compilationfailsbecauseofanerroronline15.

单项选择题

10.classLine{11.publicclassPoint{publicintx，y；}12.publicPointgetPoint（）{returnnewPoint（）；}13.}14.classTriangle{15.publicTriangle（）{16.//insertcodehere17.}18.}Whichcode，insertedatline16，correctlyretrievesalocalinstanceofaPointobject？（）
A.Pointp=Line.getPoint（）；
B.Line.Pointp=Line.getPoint（）；
C.Pointp=（newLine（））.getPoint（）；
D.Line.Pointp=（newLine（））.getPoint（）；

A.classLine{11.publicclassPoint{publicintx，y；}12.publicPointgetPoint（）{returnnewPoint（）；}13.}14.classTriangle{15.publicTriangle（）{16.//insertcodehere17.}18.}Whichcode，insertedatline16，correctlyretrievesalocalinstanceofaPointobject？（）
A.Pointp=Line.getPoint（）；
B.Line.Pointp=Line.getPoint（）；
C.Pointp=（newLine（））.getPoint（）；
D.Line.Pointp=（newLine（））.getPoint（）；