sb1.append(abc); s1.append(abc);
sb1.append(abc); s1.concat(abc);
sb1.concat(abc); s1.append(abc);
sb1.concat(abc); s1.concat(abc);
sb1.append(abc); s1 = s1.concat(abc);
第1题:
A.However
B.Nevertheless
C.Moreover
D.Although
第2题:
A.Compilation fails.
B.Nothing is added to the file system.
C.Only a new file is created on the file system.
D.Only a new directory is created on the file system.
E.Both a new file and a new directory are created on the file system.
第3题:
A.give
B.have been giving
C.are giving
D.have given
第4题:
public class TestString3 { public static void main(String[] args) { // insert code here System.out.println(s); } } Which two code fragments, inserted independently at line 3, generate the output 4247?()
第5题:
A.Nooutputisproduced.123
B.Nooutputisproduced.234
C.Nooutputisproduced.1234
D.Anexceptionisthrownatruntime.123
第6题:
A.Set set = new TreeSet();
B.Set set = new HashSet();
C.Set set = new SortedSet();
D.List set = new SortedList();
E.Set set = new LinkedHashSet();
第7题:
A. 456:91
B. 123:70
C. 123:440
D. 456:321
E. 123:550
第8题:
If a new key 67 is inserted into the given hash table,what will be its address?
A.3
B.4
C.5
D.6
第9题:
第10题:
Given: Integer i = new Integer (42); Long l = new Long (42); Double d = new Double (42.0); Which two expression evaluate to true?()