String issue in Java with slashes

Question

I've a simple code as below and it returns false when I have a space after "N/A" string.

String a = "N/A ";
if((a.trim())=="N/A")
{
 System.out.println("true");
}
else{
 System.out.println("false");
}

if I remove the space as "N/A" then it returns true. What am I missing here. I know I'm making a silly mistake couldn't figure it out.

Thanks in advance.

Use equals() instead of == also fix the (())) issue in if condition — aviad, May 19 '12 at 07:48

score 5 · Answer 1 · answered May 19 '12 at 07:50

5

First of all, don't compare strings using == operator. Use if(a.trim().equals("N/A")), it should help. Read for example here about comparing objects in Java.

answered May 19 '12 at 07:50

Piotr Sobczyk

6,215
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score 2 · Answer 2 · answered May 19 '12 at 07:50

2

Try below...

String a = "N/A ";
if(a.trim().equals("N/A"))
{
 System.out.println("true");
}
else{
 System.out.println("false");
}

== compares object and .equals() compares values.

see this

answered May 19 '12 at 07:50

Ketan

5,011
8
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score 1 · Accepted Answer · answered May 19 '12 at 07:48

1

Have you tried using equals to compare instead of object identity?

answered May 19 '12 at 07:48

Has QUIT--Anony-Mousse

73,503
12
131
189

score 1 · Answer 4 · answered May 19 '12 at 07:51

1

Use equals() instead of == also fix the the paratheses issue in if condition

answered May 19 '12 at 07:51

aviad

7,775
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String issue in Java with slashes

4 Answers4