单项选择题
A.add import animals. mammals.*； at line 2 in Salmon.java
B.add import animals.fish.*； at line 2 in GrizzlyBearjava
C.add import animals.fish.Salmon.*； at line 2 in GrizzlyBear.java
D.add import animals. mammals.GrizzlyBear*； at line 2 in Salmon.java
多项选择题 And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." （current directory）.Which two java commands entered at the command line will run MainClass？（）
单项选择题 Given the following directory structure： And the following command line invocation： javac –d classes source/Utils.java Assume the current directory is bigProject， what it the result？（）
单项选择题 Which code， inserted at line 16， will cause a java.lang.ClassCastException？（）
