填空题
Public class test (
Public static void stringReplace (String text) (
Text = text.replace (‘j’ , ‘i’);
)
public static void bufferReplace (StringBuffer text) (
text = text.append (“C”)
)
public static void main (String args[]} (
String textString = new String (“java”);
StringBuffer text BufferString = new StringBuffer (“java”);
stringReplace (textString);
bufferReplace (textBuffer);
System.out.printLn (textString + textBuffer);
)
)
What is the output?()
javajavaC
相关考题
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单项选择题
String a = “ABCD”; String b = a.toLowerCase(); b.replace(‘a’, ‘d’); b.replace(‘b’, ‘c’); System.out.println(b); What is the result? ()
A. abcd
B. ABCD
C. dccd
D. dcba
E. Compilation fails.
F. An exception is thrown at runtime. -
单项选择题
System.out.println(Math.sqrt(-4D));Whatistheresult?()
A. –2
B. NaN
C. Infinity
D. Compilation fails.
E. An exception is thrown at runtime. -
单项选择题
Whichinterfacedoesjava.util.Hashtableimplement?()
A. java.util.Map
B. java.util.List
C. java.util.Hashable
D. java.util.Collection
