Core Java 面试题与答案
Test your skills through the online practice test: Core Java Quiz Online Practice Test
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问题 42. Which characters may be used as the second character of an identifier,but not as the first character of an identifier?
The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier.
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问题 43. Is 'abc' a primitive value?
The String literal 'abc' is not a primitive value. It is a String object.
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问题 44. What restrictions are placed on the values of each case of a switch statement?
During compilation, the values of each case of a switch statement must evaluate to a value that can be promoted to an int value.
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问题 45. What is the difference between a field variable and a local variable?
A field variable is a variable that is declared as a member of a class. A local variable is a variable that is declared local to a method.
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