Given:11.publicvoidgenNumbers(){12.ArrayListnumbers=newArrayList();13.for(inti=0;i<10;i++){14.intvalue=i*((int)Math.random());15.IntegerintObj=newInteger(value);16.numbers.add(intObj);17.}18.System.out.println(numbers);19.}WhichlineofcodemarkstheearliestpointthatanobjectreferencedbyintObjbecomesacandidateforgarbagecollection?()
A.Line19
B.TheobjectisNOTacandidateforgarbagecollection.
C.Line17
D.Line16
E.Line18
第1题:
4、以下哪段代码可以编译:
A.int i,k; for (i=0, k=9; i<10 && k>0; i++, k--);
B.int i; for (i=5, int j=10; j<10; j-- ) ;
C.int i,j; for (i=0, j=10; i<10, j>0; i++, j--)
D.int i,j; for (i=0; j=10; i<10; i++, j--);
第2题:
3、以下for语句的表示方法,错误的是
A.int i=0; for(i; i<10; i++){}
B.for(int i=0, i<10, i++){}
C.int i; for(i=0; i<10; i++){}
D.for(int i=0; i<10; ){}
第3题:
定义数组: int number[10]; 以下哪个循环可以遍历整个数组且没有越界操作
A.for (int i = 0; i < 10; i++ )
B.for (int i = 9; i >= 0; i-- )
C.for (int i = 0; i < =10; i++ )
D.for (int i = 0; i < = 9; i++ )
E.for (int i = 10; i > 0; i-- )
F.for (int i =1; i < 10; i++ )
G.for (int i =1; i <= 10; i++ )
H.for (int i =1; i <= 9; i++ )
第4题:
以下for语句的表示方法,错误的是
A.int i=0; for(i; i<10; i++){}
B.for(int i=0, i<10, i++){}
C.int i; for(i=0; i<10; i++){}
D.for(int i=0; i<10; ){}
第5题:
本题的功能是计算l~10之间除了5以外的各个自然数的和。
public class javal{
public static void main(String[]args){
int i=1
int sum=0;
while(i<;=10){
if(i= =5){
;
;
}
;
i++;
}
System.out.println("sum="+sum);
}
}
第6题:
A.for(inti=0;i<a.size();i++) System.out.println(a.get(i)));
B.for(inti=0;i<a.size();i++) System.out.println(a[i]);
C.while(iter.hasNext()) System.out.println(iter.next());
D.for(inti=0,i<a.size();i++) System.out.println(iter[i]);
E.for(inti=0;i<a.size();i++) System.out.println(iter.get(i));
第7题:
importjava.util.*;
publicclassNameList{
privateListnames=newArrayList();
publicsynchronizedvoidadd(Stringname){names.add(name);}
publicsynchronizedvoidprintAll(){
for(inti=0;iSystem.out.print(names.get(i)+);
}
}
publicstaticvoidmain(String[]args){
finalNameListsl=newNameList();
for(inti=0;i<2;i++){
newThread(){
publicvoidruin(){
sl.add(”A”);
sl.add(”B”);
sl.add(”C”);
sl.printAll();
}
}.start();
}
}
}
Whichtwostatementsaretrueifthisclassiscompiledandrun?()
第8题:
11.publicvoidgenNumbers(){12.ArrayListnumbers=newArrayList();13.for(inti=0;i<10;i++){14.intvalue=i*((int)Math.random());15.IntegerintObj=newInteger(value);16.numbers.add(intObj);17.}18.System.out.println(numbers);19.}WhichlineofcodemarkstheearliestpointthatanobjectreferencedbyintObjbecomesacandidateforgarbagecollection?()
A.Line16
B.Line17
C.Line18
D.Line19
E.TheobjectisNOTacandidateforgarbagecollection.
第9题:
11.public void genNumbers(){12.ArrayList numbers=new ArrayList();13.for(inti=0;i14.intvalue=i*((int)Math.random());15.IntegerintObj=newInteger(value);16.numbers.add(intObj);17.}18.System.out.println(numbers);19.}Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbagec ollection?()
A.Line16
B.Line17
C.Line18
D.Line19
E.The object is NOT a candidate for garbage collection.