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How can I express that two values are not equal to eachother?

Asked 2011-12-03T04:57:36.400
13

Is there a method similar to equals() that expresses "not equal to"?

An example of what I am trying to accomplish is below:

if (secondaryPassword.equals(initialPassword)) 
{
    JOptionPane.showMessageDialog(null, "You've successfully completed the program.");
} else {
    secondaryPassword = JOptionPane.showInputDialog(null, "Your passwords do not match. Please enter you password again."); 
}

I am trying to find something that will not require me to use if ( a != c).

java if-statement equals boolean-expression
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2 Answers

34

"Not equals" can be expressed with the "not" operator ! and the standard .equals. 

if (a.equals(b)) // a equals b
if (!a.equals(b)) // a not equal to b
answered 2011-12-03T04:59:43.043
1

If the class implements comparable, you could also do 

int compRes = a.compareTo(b);
if(compRes < 0 || compRes > 0)
    System.out.println("not equal");
else
    System.out.println("equal);

doesn't use a !, though not particularly useful, or readable....

answered 2011-12-03T05:35:33.483

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