A.Arrays.sort(s);
B.s=newTreeSet(s);
C.Collections.sort(s);
D.s=newSortedSet(s);
第1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2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3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4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5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6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
第7题
A.Nooutputisproduced.123
B.Nooutputisproduced.234
C.Nooutputisproduced.1234
D.Anexceptionisthrownatruntime.123
E.Anexceptionisthrownatruntime.234
F.Anexceptionisthrownatrijntime.1234
第8题
A.ab
B.bc
C.abc
D.Compilationfails.
E.Anexceptionisthrownatruntime.
第9题
11.classPayload{
12.privateintweight;
13.publicPayload(intwt){weight=wt;}
13.publicvoidsetWeight(mtw){weight=w;}
15.publicStringtoString{returnInteger.toString(weight);}
16.}
17.
18.publicclassTestPayload{
19.staticvoidchangePayload(Payloadp){
20./*insertcodehere*/
21.}
22.
23.publicstaticvoidmain(String[]args){
24.Payloadp=newPayload();
25.p.setWeight(1024);
26.changePayload(p);
27.System.out.println(”Thevalueofpis+p);
28.}
29.}
Whichstatement,placedatline20,causesthecodetoprintThevalueofpis420.”?()
第10题
publicclassItem{
privateStringdesc;
publicStringgetDescription(){returndesc;}
publicvoidsetDescription(Stringd){desc=d;}
publicstaticvoidmodifyDesc(Itemitem,Stringdesc){
item=newItem();
item.setDescription(desc);
}
publicstaticvoidmain(String[]args){
Itemit=newItem();
it.setDescription(”Gobstopper”);
Itemit2=newItem();
it2.setDescription(”Fizzylifting”);
modifyDesc(it,Scrumdiddlyumptious”);
System.out.println(it.getDescription());
System.out.println(it2.getDescription());
}
}
Whatistheoutcomeofthecode?()
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