trivialeditor.java

《Java核心技术应用开发》电子工业出版社书籍源代码

package sample;
import java.io.*;

public class TrivialEditor {
    public static void main(String args[]) {
        if(args.length <1){
            System.out.println("usage: TrivialEditor filename");    
                    return;
    
        }
        PrintWriter writer = null;
        try {
            writer = new PrintWriter(new FileWriter(args[0]));
            BufferedReader reader;
            reader = new BufferedReader(new InputStreamReader(System.in));
            String line;
            System.out.print("> ");
            line = reader.readLine();
            while (line != null) {
                writer.println(line);
                System.out.print("> ");
                                writer.flush();
                line = reader.readLine();
            }
            //writer.flush();
        } catch (IOException e) {
            System.out.println("Error: " + e);
        } finally {
            writer.close();
        }
    }
}