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diff --git a/linter/LongLineCheck.java b/linter/LongLineCheck.java
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+++ b/linter/LongLineCheck.java
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+// Nik Johnson
+// 2-24-2024
+// TA: Andy Ruan
+
+import java.util.*;
+
+// long line checker
+public class LongLineCheck implements Check {
+
+    // if the line being checked is 100 characters or longer, return a new error (code 1)
+    // takes line and line number
+    // returns error inside optional
+    public Optional<Error> lint(String line, int lineNumber) {
+        if (line.length() >= 100) {
+            return Optional.of(new Error(1, lineNumber, 
+            "Line length exceeded maximum length of 100 characters"));
+        }
+
+        return Optional.empty();
+    }
+}