单项选择题
public class Test {
public static void main(String [] args) {
System.out.println(args.length > 4 &&
args[4].equals(“-d”));
}
}
If the program is invoked using the command line: java Test One Two Three –d
What is the result?()
A. true
B. false
C. Compilation fails.
D. An exception is thrown at runtime.
相关考题
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多项选择题
Giventhatbandcrefertoinstancesofwrapperclasses,whichtwostatementsaretrue?()
A. b.equals(b) returns true.
B. b.equals(c) returns the same result as b == c.
C. b.eqials(c) can return false even if c.equals(b) returns true.
D. b.equals(c) throws an exception if b and c are different wrapper types.
E. b.equals(c) returns false if the type of wrapper objects being compared are different. -
单项选择题
String a = null; a.concat(“abc”); a.concat(“def”); System.out.println(a); What is the result?()
A. abc
B. null
C. abcdef
D. Compilation fails.
E. The code runs with no output.
F. An exception is thrown at runtime. -
多项选择题
public static void main( String[] args ) { Integer a = new Integer(10); Integer b = new Integer(10); Integer c = a; int d = 10; double e = 10.0; } Which three evaluate to true?()
A. (a == c)
B. (d == e)
C. (b == d)
D. (a == b)
E. (b == c)
F. (d == 10.0)
