OCJP(310-065)章节练习(2019.05.07)

A.int Long
B.Short Long
C.Compilation fails.
D.An exception is thrown at runtime.

A.final
B.static
C.native
D.public
E.private

A.b = nf.parse（ input ）；
B.b = nf.format（ input ）；
C.b = nf.equals（ input ）；
D.b = nf.parseObject（ input ）；

A.any class
B.only the Target class
C.any class in the test package
D.any class that extends Target

A.The file will compile without error.
B.Compilation fails. Only line 7 contains an error.
C.Compilation fails. Only line 12 contains an error.
D.Compilation fails. Only line 13 contains an error.
E.Compilation fails. Only lines 7 and 12 contain errors.

A.If the compile is successful， Utils.class is added to the source directory.
B.The compiler returns an invalid flag error.
C.If the compile is successful， Utils.class is added to the classes directory.
D.If the compile is successful， Utils.class is added to the bigProject directory.

A.Compilation fails because of an error in line 3.
B.Compilation fails because of an error in line 7.
C.Compilation fails because of an error in line 9.
D.If you define D e = new E（）， then e.bMethod（） invokes the version of bMethod（） defined in Line 5.
E.If you define D e = （D）（new E（））， then e.bMethod（） invokes the version of bMethod（） defined in Line 5.
F.If you define D e = （D）（new E（））， then e.bMethod（） invokes the version of bMethod（） defined in Line 9.

A.public void addStrings(List list) {
B.public void addStrings(List<String> list) {
C.public void addStrings(List<? super String> list) {
D.public void addStrings(List<? extends String> list) {  B,C

A.Canada
B.null Canada
C.Canada null
D.Canada Canada
E.Compilation fails due to an error on line 26.
F.Compilation fails due to an error on line 29.

A.The value of s is 14-dic-2000.
B.The value of s is Dec 14， 2000.
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 13.