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sun sites java Sample Question ??

 
Ranch Hand
Posts: 144
Redhat Java Ubuntu
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5. Which correctly creates an array of five empty Strings (select all that apply)?
a>String a [ ] = new String [5]; for (int i = 0; i < 5; a[i++] = ""); <br /> b>String a [ ] = {"", "", "", "", ""};
c>String a [5];
d>String [ ] a = new String [5]; for (int i = 0; i < 5; a[i++] = null); <br /> e>String [5] a;


..
.
.
...
.
.
the correct answers are A and B.
Now I want to know why not D?
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Greenhorn
Posts: 17
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There's no Strings created in d.
-VG.
 
Ranch Hand
Posts: 4716
9
Scala Java
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the answer is that a null string is not the same thing as an empty string.
String s;
System.out.println(s)//prints "null"
String s = "";
System.out.println(s)//prints nothing
 
Greenhorn
Posts: 23
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Surprisingly, when I run the program it promped null in both the cases, Not blank and null, why? Are both the same? Then I have doubt about the original question. If it's null for A then A is also wrong answer. For your info. I have been using JDK 1.3.
 
sunil choudhary
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Redhat Java Ubuntu
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Thanks Randell
I get your point.
in 1.2 it works fine
Albait:-> I had to assign the string to null.
________
Logic is the art of Non Contradictary existence
 
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