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javastring
arun abimaniyu
arun abimaniyu

Reputation: 167

The match function not working in Java

I am doing some match functions with the Java. I have some string like this park,reserved_parking etc.. If i search for the word park like this

if(input.trim().contains ("Park"))
dummies = dummies + "   1";
else 
dummies = dummies + "   0";

It prints the values for reserved_parking also. I don't know how to find the exact match in Java. any help will be appreciated.

Upvotes: 0

Views: 108

Answers (4)

javatutorial
javatutorial

Reputation: 1944

To find an exact match, you will need a Regular Expression, like this:

private boolean isMatching(String source, String stringToSearch){
     String pattern = "\\b" + stringToSearch + "\\b";
     Pattern p = Pattern.compile(pattern);
     Matcher m = p.matcher(source);
     return m.find();
}

The \b option in the regular expression means "word bonduary". So, this will match exactly "Park" if you pass that as a parameter in the stringToSearch, but it won't match "reserved_parking", returning false.

Upvotes: 0

Aron_dc
Aron_dc

Reputation: 863

Contains does what it says. It tests if the String you give as input, is somewhere in the String you test against. So "batteryparkhorsewidow".contains("park") will return true.

What you are looking for may be the equals method. This method tests for String equality. So it will only return true if your String is "park" nothing more, nothing less.

Please mind that equals works case sensitive. For a case insensitive equality check use equalsIgnoreCase

Upvotes: 2

kanly
kanly

Reputation: 129

It seems a case issue. You can lowercase or uppercase the string before checking it.

input.trim().toUpperCase().contains("PARK")

Or use some external library like Apache Commons Lang's containsIgnoreCase

StringUtils.containsIgnoreCase(input, "Park");

Upvotes: 0

Ankur Singhal
Ankur Singhal

Reputation: 26067

You might need to go for case in-sensitive search,

change both the input and matched String to Upper case/lower case and then match

.

Input - park

public static void main(String[] args) {
        String input = "park";
        if (input.trim().toUpperCase().contains("Park".toUpperCase()))
            dummies = dummies + "   1";
        else
            dummies = dummies + "   0";

        System.out.println(dummies);
    }

Output

   1

Input - reserved_parking

public static void main(String[] args) {
        String input = "reserved_parking";
        if (input.trim().toUpperCase().contains("Park".toUpperCase()))
            dummies = dummies + "   1";
        else
            dummies = dummies + "   0";

        System.out.println(dummies);
    }

Output

   1

Upvotes: 0

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