单项选择题
public class X {
public static void main （String[]args） {
String s1 = new String （“true”）；
Boolean b1 = new Boolean （true）；
if （s2.equals（b1）） {
System.out.printIn（“Equal”）；
}
}
}
What is the result？（）
A. The program runs and prints nothing.
B. The program runs and prints “Equal”
C. An error at line 5 causes compilation to fail.
D. The program runs but aborts with an exception.
相关考题
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单项选择题
String foo = “blue”； Boolean[]bar = new Boolean [1]； if （bar[0]） { foo = “green”； } What is the result？ （）
A. Foo has the value of “”
B. Foo has the value of null.
C. Foo has the value of “blue”
D. Foo has the value of “green”
E. An exception is thrown.
F. The code will not compile. -
多项选择题
Whichtwovaliddeclarationsofachar？（）
A. Char ch = “a”；
B. Char ch = ‘\’ ‘；
C. Char ch = ‘cafe’；
D. Char ch = “cafe”；
E. Char ch = ‘\ucafe’；
F. Char ch = ‘\u10100’；
G. Char ch = （char） true； -
单项选择题
public class foo { static String s； public static void main （String[]args） { system.out.printIn （“s=” + s）； } } What is the result？（）
A. The code compiles and “s=” is printed.
B. The code compiles and “s=null” is printed.
C. The code does not compile because string s is not initialized.
D. The code does not compile because string s cannot be referenced.
E. The code compiles， but a NullPointerException is thrown when toString is called.
