JAVA - String contains char letter. Possible to check?
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How can I check if a single character appears in a string?
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How would you count occurrences of a string (actually a char) within a string?
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How to detect the language of a string?
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Python - Check If Word Is In A String
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How to check if the string is empty?
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Test whether string is a valid integer
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Validating user's UTF-8 name in Javascript
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why javascript's charAt() with a string returns the first letter
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is there any way to decode string?
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How to get the ASCII value of a character
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Valid characters in a Java class name
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Checking whole string with a regex
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How do I compare strings in Java?
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How do you use: isalnum, isdigit, isupper to test each character of a string?
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Reading string from input with space character?
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How can I search for special characters?
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How to get the last characters in a String in Java, regardless of String size