001:import java.io.FileReader;
002:import java.io.BufferedReader;
003:import java.io.FileNotFoundException;
004:import java.io.IOException;
005:
006:public class ReadLineDemo1 {
007: public static void main(String[] args) {
008: String fileName = "data1.txt";
009: if(args.length>0) fileName = args[0];
010:
011: try {
012: BufferedReader reader =
013: new BufferedReader( new FileReader(fileName) );
014: while(true) {
015: String line = reader.readLine();
016: if(line==null) break;
017: System.out.println(line);
018: }
019: reader.close();
020: } catch(FileNotFoundException e) {
021: System.out.println("ファイルがありません");
022: } catch(IOException e) {
023: System.out.println("入出力エラーです");
024: }
025: }
026:}