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import java.io.FileReader;
import java.io.LineNumberReader;
public class Main {
public static void main(String[] args) throws Exception {
LineNumberReader r = new LineNumberReader(new FileReader("yourFile.txt"));
String line = null;
while ((line = r.readLine()) != null) {
System.out.println(r.getLineNumber() + ": " + line);
}
r.close();
}
}
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