我做了一个扩展InputStream的新类,它必须@Override read().
我正在尝试使用方法read(int b),但是当我使用它时,它将转到该方法
read(),我不能使用参数,我通过了.

这是我的代码：

public class Run {

    public static void main(String[] args) {

        DFSMaze3dGenerator mg = new DFSMaze3dGenerator();
        try {
            Maze3d maze3d = mg.generate(1, 5, 5);
            maze3d.print3DMaze();
            OutputStream out = new MyCompressorOutputStream(
                    new FileOutputStream("1.maz"));
            out.write(maze3d.toByteArray());
            byte[] arr = maze3d.toByteArray();
            System.out.println("");
            for (int i = 0; i < arr.length; i++) {
                System.out.print(arr[i] + ",");
            }
            out.close();
            InputStream in = new MyDecompressorInputStream(new FileInputStream(
                    "1.maz"));
            byte b[] = new byte[maze3d.toByteArray().length];
            in.read(b);
            in.close();
            Maze3d loaded = new Maze3d(b);
            System.out.println(loaded.equals(maze3d));

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

使用方法时如何使用参数：read(b);
???

public class MyDecompressorInputStream extends InputStream {

    InputStream in;
    int count;
    boolean even = false;

    public MyDecompressorInputStream(InputStream in) {
        super();
        this.in = in;
    }

    @Override
    public int read() throws IOException {

        return 100;

    }



}

解决方法:

您是否有必要将InputStream子类化？主程序中的任何代码都不会利用实现中添加的任何代码.但是,您应该在实现中实现read(byte []).这是适用于我的机器的类似实现.

class MyInputStream extends InputStream {
    InputStream in;
    int count;
    boolean even = false;

    public MyInputStream(InputStream stream){
        this.in = stream;
    }

    @Override
    public int read() throws IOException {
        return this.in.read();
    }

    @Override
    public int read(byte[] toStore) throws IOException {
        return this.in.read(toStore);
    }
}

和我的主要使用类似：

public static void main(String[] args){
    MyInputStream stream = new MyInputStream(new ByteArrayInputStream(new byte[] {0, 0, 1}));
    byte[] storage = new byte[3];
    try {
        stream.read(storage);
        for (int i = 0; i < storage.length; ++i){
            System.out.println(storage[i]); //0 0 1
        }

    } catch (IOException e) {
        e.printStackTrace();
    }
    stream.close()

}