A.ListmyList=myArray.asList();
B.ListmyList=Arrays.asList(myArray);
C.ListmyList=newArrayList(myArray);
D.ListmyList=Collections.fromArray(myArray);
第1题
stem.out.println(Collections.binarySearch(list,a”));}WhatistheresultofcallingsearchwithavalidListimplementation?()
A.0
B.1
C.a
D.b
E.c
F.Theresultisundefined.
第2题
gs=newArrayList();strings.add(?aAaA”);strings.add(”AaA”);strings.add(?aAa”);strings.add(”AAaa”);Collections.sort(strings);for(Strings:strings){System.out.print(s+);}}}Whatistheresult?()
A.Compilationfails.
B.aAaAaAaAAaaAaA
C.AAaaAaAaAaaAaA
D.AaAAAaaaAaAaAa
E.aAaAaAaAaAAAaa
F.Anexceptionisthrownatruntime.
第3题
A.Collections.sort(a,a.reverse());intresult=Collections.binarySearch(a,“6”);
B.Comparatorc=Collections.reverseOrder();Collections.sort(a,c);intresult= Collections.binarySearch(a,“6”);
C.Comparatorc=Collections.reverseOrder();Collections.sort(a,c);intresult=Collections.binarySearch(a,“6”,c);
D.Comparatorc=Collections.reverseOrder(a);Collections.sort(a,c);intresult=Collections.binarySearch(a,“6”,c);
E.Comparatorc=newInverseComparator(newComparator());Collections.sort(a);intresult=Collections.binarySearch(a,“6”,c);
第4题
34.HashMapprops=newHashMap();35.props.put(”key45”,somevalue”);36.props.put(”key12”,someothervalue”);37.props.put(”key39”,yetanothervalue”);38.Sets=props.keySet();39.//insertcodehereWhat,insertedatline39,willsortthekeysinthepropsHashMap?()
A.Arrays.sort(s);
B.s=newTreeSet(s);
C.Collections.sort(s);
D.s=newSortedSet(s);
第5题
oidprocess(byte[]){/*morecodehere*/}4.}1.packageapp;2.publicclassSomeApp{3.publicstaticvoidmain(String[]args){4.byte[]bytes=newbyte[256];5.//insertcodehere6.}7.}Whatisrequiredatline5inclassSomeApptousetheprocessmethodofBitUtils?()
A.process(bytes);
B.BitUtils.process(bytes);
C.util.BitUtils.process(bytes);
D.SomeAppcannotusemethodsinBitUtils.
E.importutil.BitUtils.*;process(bytes);
第6题
trings){returns+s;}5.}andgivenanotherclassDemo:1.//insertcodehere2.3.publicclassDemo{4.publicstaticvoidmain(String[]args){5.System.out.println(twice(”pizza”));6.}7.}Whichcodeshouldbeinsertedatline1ofDemo.javatocompileandrunDemotoprintpizzapizza”?()
A.importutils.*;
B.staticimportutils.*;
C.importutils.Repetition.*;
D.staticimportutils.Repetition.*;
E.importutils.Repetition.twice();
F.importstaticutils.Repetition.twice;
G.staticimportutils.Repetition.twice;
第7题
implementsDeclareStuff{publicstaticvoidmain(String[]args){intx=5;newTestDeclare().doStuff(++x);}voiddoStuff(ints){s+=EASY+++s;System.out.println(”s+s);}}Whatistheresult?()
A.s14
B.s16
C.s10
D.Compilationfails.
E.Anexceptionisthrownatruntime.
第8题
1.interfaceDoStuff2{2.floatgetRange(intlow,inthigh);}3.4.interfaceDoMore{5.floatgetAvg(inta,intb,intc);}6.7.abstractclassDoAbstractimplementsDoStuff2,DoMore{}8.9.classDoStuffimplementsDoStuff2{10.publicfloatgetRange(intx,inty){return3.14f;}}11.12.interfaceDoAllextendsDoMore{13.floatgetAvg(inta,intb,intc,intd);}Whatistheresult?()
A.Thefilewillcompilewithouterror.
B.Compilationfails.Onlyline7containsanerror.
C.Compilationfails.Onlyline12containsanerror.
D.Compilationfails.Onlyline13containsanerror.
E.Compilationfails.Onlylines7and12containerrors.
F.Compilationfails.Onlylines7and13containerrors.
G.Compilationfails.Lines7,12,and13containerrors.
第9题
licstaticvoidmain(String[]args){//morecodehere}}Assumethattheclassfileislocatedin/foo/com/sun/sjcp/,thecurrentdirectoryis/foo/,andthattheclasspathcontains.(currentdirectory).WhichcommandlinecorrectlyrunsCommander?()
A.javaCommander
B.javacom.sim.sjcp.Commander
C.javacom/sun/sjcp/Commander
D.java-cpcom.sun.sjcpCommander
E.java-cpcom/sun/sjcpCommander
第10题
p=newPass2();p.doStuff(x);System.out.print(”mainx=+x);}voiddoStuff(intx){System.out.print(”doStuffx=+x++);}}Whatistheresult?()
A.Compilationfails.
B.Anexceptionisthrownatruntime.
C.doStuffx=6mainx=6
D.doStuffx=6mainx=7
E.doStuffx=7mainx=6
F.doStuffx=7mainx=7
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