Java OR operator in if string contains statement

Question

I have the following code.

for (String str5 : verticesposition2) {
    if(!str5.contains(("Vertex")||("Name")||("Transmittance")) {
        System.out.println(str5); 
    }                           
}

As you can see above if the string does NOT contain Vertex, Name or Transmittance I want it to print out. However Im getting a compilation error saying that the || operator is undefined for the argument types. I'm relatively new to programming so Im not sure what this means could someone kindly point in the right direction on how to fix my code?

string contains can be only used with CharSequence. your input in the bracket is not CharSequence. docs.oracle.com/javase/7/docs/api/java/lang/… and docs.oracle.com/javase/7/docs/api/java/lang/CharSequence.html — bgth
– bgth, Commented May 14, 2014 at 6:14

Bohemian · Accepted Answer · 2014-05-14 06:09:18Z

17

Java doesn't have a syntax like that, but you can put the "or" in a regex:

if (!str5.matches(".*(Vertex|Name|Transmittance).*")) {

Note that java's matches() (unlike many other languages) must match the whole string to return true, hence the .* at each end of the regex.

answered May 14, 2014 at 6:09

Bohemian♦

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Evan Knowles · Accepted Answer · 2014-05-14 06:09:43Z

6

The || operator works on individual boolean terms, not to provide a bunch of different arguments.

if((!str5.contains("Vertex")||!str5.contains("Name")||!str5.contains("Transmittance")){

answered May 14, 2014 at 6:09

Evan Knowles

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2 Comments

kai Over a year ago

its logically wrong. it should be: if((!str5.contains("Vertex")&&!str5.contains("Name")&&!str5.contains("Transmittance")) because the OP want to know if the string contain not one of the words.

kai Over a year ago

@WhoAmI His statement is true if the str5 not contains "Vertext" for example, but it should only be true if str5 not contains any of the three words-

Alex G · Accepted Answer · 2014-05-14 06:13:25Z

1

try to use this code

 public static void main(String[] args) {
        List<String> verticesposition2 = new ArrayList<String>();
        verticesposition2.add("safdsfVertex");
        verticesposition2.add("safdsfNamesfsd");
        verticesposition2.add("notCONTAINS");

        for (String str5 : verticesposition2){
            if(!(str5.contains("Vertex")||str5.contains("Name")||str5.contains("Transmittance"))){
                System.out.println(str5);
            }
        }
    }

Output:

notCONTAINS

if speed isn't critical -- use those with regexp.

answered May 14, 2014 at 6:13

Alex G

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