CODEWITHSUNDEEP
javastring
Liamnator1
Liamnator1

Reputation: 21

How do I set a string variable to a string contained in another variable

For example, I have a string variable line 

(line.contains("for") || line.contains("def") || line.contains("if")    || line.contains("while") || line.contains("else") || line.contains("elif")

and I want to set a new string variable keyword to the keyword in this conditional statement, how would be able to do this, like keyword = keyword in line.

Upvotes: 2

Views: 114

Answers (3)

The Scientific Method
The Scientific Method

Reputation: 2436

alternative here:

List<String> keywords = new LinkedList<String>;
keywords.add("for");  // put your keywords in a list
keywords.add("def");
keywords.add("if");
keywords.add("else");
String strword;
for(keyword:keywords){
 if(line.contains(keyword)){
    String strword = keyword;
 }    
}

Upvotes: 0

Benoit
Benoit

Reputation: 5394

Stream provide a simple and elegant solution in this case:

    String keyword = Stream.of("elif", "for", "def", "if", "while", "else")
            .filter(line::contains)
            .findFirst()
            .orElse("no-keyword-found");

Note: "elif" must be placed before "if"

Upvotes: 4

Michael
Michael

Reputation: 44110

Why not something like this?

public static Optional<String> getFirstMatch(String string, String... subStrings)
{
    return Arrays.stream(subStrings).filter(string::contains).findFirst();
}

Sample usage:

Optional<String> match = getFirstMatch("myInput", "my", "Input");
if (match.isPresent())
{
    String foo = match.get();
    //...
}

Upvotes: 0

Related Questions