Can any one explain the asserTrue why it is failed?

Question

Possible Duplicate:
How do I compare strings in Java?
Java String.equals versus ==

I am new to Selenium and Java.

I have tried the below to compare the field value of last name to the one which i supplied.

String lastname=selenium.getValue("//*[@id='lastName']");
System.out.println(lastname);
assertTrue (lastname == "xxx");

It is keep on failing.

Just literally tried to change the last line with help of Eclipse (just trial and error)

assertTrue("lastname.equals("xxx"));

It is working fine... Why it is failed in first case? == is not allowed to compare strings?

This has to be the most common gotcha in Java. – Peter Lawrey Jan 03 '13 at 08:55 — Peter Lawrey, Jan 03 '13 at 08:55

score 2 · Accepted Answer · edited May 23 '17 at 12:04

2

Short answer: == checks for same object .equals checks for the same value.

More info in How do I compare strings in Java?

edited May 23 '17 at 12:04

Community

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answered Jan 03 '13 at 08:50

Karthik T

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score 0 · Answer 2 · answered Jan 03 '13 at 08:50

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equals function checks the actual contents of the lastname. == operator checks whether the references to the objects are equal.

answered Jan 03 '13 at 08:50

Chandana

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More Info: http://stackoverflow.com/questions/767372/java-string-equals-versus – Chandana Jan 03 '13 at 08:51

score 0 · Answer 3 · answered Jan 03 '13 at 08:51

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You must use equals() to compare strings with Java, as you guessed.

answered Jan 03 '13 at 08:51

Arcadien

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score 0 · Answer 4 · answered Jan 03 '13 at 08:51

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You're actually comparing pointers (or really reference equality) when you use == with strings. In other words you're testing if two objects are the same, rather than the content of the objects.

answered Jan 03 '13 at 08:51

Anders R. Bystrup

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score 0 · Answer 5 · answered Jan 03 '13 at 08:52

For comparing equality of string ,We Use equals() Method. There are two ways of comparison in java. One is "==" operator and another "equals()" method . "==" compares the reference value of string object whereas equals() method is present in the java.lang.Object class. This method compares content of the string object.

Can any one explain the asserTrue why it is failed?

5 Answers5