单项选择题
A. java.util.Map B. java.util.List C. java.util.Hashable D. java.util.Collection
publicclassTest{ publicstaticvoidmain（String[]args）{ St...
public class Test { public static void main（String[] args） { String str = NULL； System.out.println（str）； } } What is the result？（）
A. NULL B. Compilation fails. C. The code runs with no output. D. An exception is thrown at runtime.
public class Test { private static float[] f = new flo...
public class Test { private static float[] f = new float[2]； public static void main（String args[]） { System.out.println（“f[0] = “ + f[0]）； } } What is the result？（）
A. f[0] = 0 B. f[0] = 0.0 C. Compilation fails. D. An exception is thrown at runtime.
Whatisthenumericalrangeofachar？（）A. 0 ... 32767B. 0 ......
单项选择题What is the numerical range of a char？（）
A. 0 ... 32767 B. 0 ... 65535 C. –256 ... 255 D. –32768 ... 32767 E. Range is platform dependent.
