Is this a valid java array? modelName[i] == inputName?

Question

if this is not how do i acheive this?
I am trying to read the array value of modelName[i] store it in inputName and the determine if inputName is == to the variable i am looking for (the models name) and then if it is display the whole line of code.

while ( response != null && response.length() > 0){
System.out.println("You are searching for " + response);
for (int i = 0; i < modelName.length; i++)
{
modelName[i] == inputName;
if (inputName == response)
System.out.println( modelName[i] + "\t\t" + digitStockNumber[i] + "\t" + modelColor[i] + "\t" + integerPrice[i] );
}
}

ok but now my thing is in an infinite loop?

Answer 1

(1) "==" is for comparison, not assignment. The line "modelName[i] == inputName" doesn't do anything (other than evaluate to true or false). It should instead be something like:

String inputName = modelName[i];

(2) "==" tests for object identity, and is not what you want to use for Strings in most cases.

"foo" == "foo" is not necessarily true, since there can be multiple (different) String objects whose contents is the same ("foo").

You want to use something like:

response.equals( inputName)
or
response.equalsIgnoreCase( inputName)

... depending whether you want a case-sensitive or case-insensitive compare. Also, since you've already checked response for null, it's better to use that as the object on which equals() is called -- otherwise unless you are very certain that each modelName[i] is non-null, you'd have to check inputName for null, before you could write it in the other order ("inputName.equals( response)")

---------
You have an infinite loop because you are not changing response within the while loop. Replace "while" with "if" -- or if you want to accept multiple responses from the user, then do that within the while loop (at the bottom, reassign response to the next line of input, or whatever).

Answer 2

You need to change the first "while" loop to an "if" to avoid the endless loop problem. To assign a value to the variable inputName use
inputName = modelName[i].
To compare inputName with the response use the String objects equals method e.g. inputName.equals(response)

Answer 3

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