文本的输入输出(page52)

2.2.4 再谈输入输出, 所用java类有：Out.java , In.java

public class Cat{

    public static void main(String[] args){

        Out out = new Out(args[args.length-1]);

        for(int i=0;i<args.length-1;i++){
            In in = new In(args[i]);
            String s = in.readAll();
            out.println(s);
            in.close();
        }
        out.close();
    }

}

printing result: