cat.java

来自「初级学习资料必读本」· Java 代码 · 共 47 行

import java.io.*;

public class Cat {
    public static void concatenate(String fileName) {
	RandomAccessFile raf = null;
	String line = null;

	try {
	    raf = new RandomAccessFile(fileName, "r");
	    while ((line = raf.readLine()) != null) {
		System.out.println(line);
	    }
	    return;
	} catch(FileNotFoundException fnf) {
	    System.err.println("File: " + fileName + " not found.");
	} catch(Exception e) {
	    System.err.println(e.toString());
	} finally {
	    if (raf != null) {
		try {
		    raf.close();
		} catch(IOException io) {
		}
	    }
	}
	
    }

    public static void main(String[] args) {
	for (int i = 0; i < args.length; i++) 
	    Cat.concatenate(args[i]);
    }
}