What Java-related features are new to J2SE 5.0
A. Static imports
B. package and import statements
C. Autoboxing and unboxing
D. The enhanced for loop
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The Java Basic I/O API contains what types of classes and interfaces
A. Internationalization
B. RMI, JDBC, and JNDI
C. Data streams, serialization, and file system
D. Collection API and data streams
设某二叉树的前序序列为ABC，中序序列为CBA，则该二叉树的后序序列为
A. BCA
B. CBA
C. ABC
D. CAB
When organizing the elements in a class, which order is preferred
A. Data members, methods, constructors
B. Data members, constructors, methods
Constructors, methods, data members
D. Constructors, data members, methods
E. Methods, constructors, data members
The JCheckBox and JComboBox classes belong to which package
A. java.awt
B. javax.awt
C. java.swing
D. javax.swing
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