3,2,1,
1,2,3,
Compilation fails.
The code runs with no output.
An exception is thrown at runtime.
第1题:
A.for(Objecto;list)
B.for(Objecto:list.iterator())
C.for(Objecto:getCollection())
D.for(Iteratori=list.iterator();i.hasNext();)
第2题:
A.Collections.reverseSort(list,newMyComparator());
B.Collections.sort(list,newMyComparator());list.reverse();
C.Collections.sort(list,newInverseComparator(newMyComparator()));
D.Collections.sort(list,Collections.reverseOrder(newMyComparator()));
第3题:
已知x为非空列表,那么表达式x.reverse()==list(reversed(x))的值为__________。
第4题:
public class Alpha{ private static Character() ids; public static void main( String[] args){ ids = new Character[args.length]; for (int i=0; i
第5题:
现有: 3.import java.util.*; 4.class ForInTest { 5.static List list = new ArrayList(); 6.public static void main (String [] args){ 7. 8.list.add("a"); list.add("b"); list.add("c"); 9.//insert code here 10.System.out.print(o); } } 哪一行插入到第9行将导致输出“abc”?()
第6题:
3.importjava.util.*;4.classForInTest{5.staticListlist=newArrayList();6.7.publicstaticvoidmain(String[]args){8.list.add("a");list.add("b");list.add("c");9.//insertcodehere10.System.out.print(o);11.}12.}哪一行插入到第9行将导致输出abc”?()
A.for(Objecto:list)
B.for(Iteratoro:list)
C.for(Objecto:list.iterator())
D.for(Iteratoro:list.iterator();o.hasNext();)
第7题:
publicstaticIteratorreverse(Listlist){Collections.reverse(list);returnlist.iterator();}publicstaticvoidmain(String[]args){Listlist=newArrayList();list.add(”1”);list.add(”2”);list.add(”3”);for(Objectobj:reverse(list))System.out.print(obj+,”);}Whatistheresult?()
A.3,2,1,
B.1,2,3,
C.Compilationfails.
D.Thecoderunswithnooutput.
E.Anexceptionisthrownatruntime.
第8题:
现有:3.importjava.util.*;4.classForInTest{5.staticListlist=newArrayList();6.publicstaticvoidmain(String[]args){7.8.list.add("a");list.add("b");list.add("c");9.//insertcodehere10.System.out.print(o);}}哪一行插入到第9行将导致输出abc”?()
A.for(Objecto:list)
B.for(Iteratoro:list)
C.for(Objecto:list.iterator())
D.for(Iteratoro:list.iterator();o.hasNext();)
第9题:
11. public void addStrings(List list) { 12. list.add(”foo”); 13. list.add(”bar”); 14. } What must you change in this method to compile without warnings?()
第10题:
11. List list = // more code here 12. Collections.sort(list, new MyComparator()); Which code will sort this list in the opposite order of the sort in line 12?()