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You can do this with Files.lines: try(Stream<String> lines = Files.lines(Paths.get("...")) ) { if(lines.anyMatch("omar"::equals)) { //or lines.anyMatch(l -> l.contains("omar")) System.out.println("found"); } else { System.out.println("not found"); } }
8 Ιαν 2024 · In this tutorial, we’ll review several ways of checking if a String contains a substring, and we’ll compare the performance of each. 2. String.indexOf. Let’s first try using the String.indexOf method. indexOf gives us the first position where the substring is found, or -1 if it isn’t found at all.
2 Φεβ 2024 · Use String indexOf() Method to Check if a String Contains Character. Use the Enhanced for Loop to Check if a String Contains Character. Use Java Streams anyMatch() Method to Check if a String Contains a Character. Use the matches() Method With Regular Expressions to Check if a String Contains Character. Conclusion.
The contains() method checks whether a string contains a sequence of characters. Returns true if the characters exist and false if not. Syntax. public boolean contains(CharSequence chars) Parameter Values. The CharSequence interface is a readable sequence of char values, found in the java.lang package. Technical Details. String Methods.
11 Μαρ 2014 · If you are looking to match "are" with spaces around it, simply add spaces like so: " are " and see if the line contains that string (taking some edge cases into account).
25 Μαΐ 2022 · The easiest way to check if a string contains another character is to use the contains() method on the String class. This method is called on a the string itself and takes in a string as the parameter to look for.
20 Μαΐ 2009 · Check for each character ( == string.substring(i,i+1) ) if character.getBytes()[0] equals 63 for '?' if Character.getType(character.charAt(0)) returns OTHER_SYMBOL
